Tuesday, 18 December 2007
Dear Reader,
It is not often that our field receives recognition from the government so it was a pleasure to attend the investiture of Dr Stella Dalton as a Member in the General Division of the Order of Australia. This was undertaken by State Governor Professor Marie Bashir at Government House, Sydney on 21st September 2007.
Along with others who were commended for their bravery, philanthropy, public service or contributions to dentistry, medicine, Egyptology and other disciplines, Dr Dalton was recognised for her pioneering work in treating addictions using methadone when this was still in its infancy in 1969. As a psychiatrist, she recognised that addicts were not morally bereft but that some of them may progress well with prescribed doses of a safe, long acting opioid given under supervision with psychosocial supports.
Research in the meantime has proven her to be completely correct and now this treatment is being introduced into every corner of the globe to stem some of the most serious harms from drug addiction, most notably HIV/AIDS.
The ceremony was delightful and I just regret that I was not able to meet more of the distinguished Australians present. After the ceremony drinks and canapés were served in the beautiful gardens above the Sydney Opera House while a naval band played on. I met Professor Naguib Kanawati who had been honoured for his years of service to the field of Egyptology.
I join in others by saluting all these great Australians, including Dr Stella Dalton OA.
Andrew Byrne ..
12 December 2007
10 December 2007
Withdrawal management and detoxification.
Concord Seminar 25 September 2007
Topic: Withdrawal management and detoxification-with a focus on complicated patients. [Although this was based on a talk given by Dr Ferguson, the summary also includes audience discussion and input from the three authors.]
Dr Ferguson stressed that the McKinnon Unit is not a �detoxification� ward but a medical unit which manages drug and alcohol withdrawals. The term detoxification is commonly used to refer to "chemicals, drugs, and food additives in the processed foods that we eat....", so that the general public, as well as our patients, may conceptualise drug withdrawal as a removal of such toxins: bringing to mind colonic irrigation, detox diets like Lemon Detox, herbal laxatives and high-fibre diets eliminating caffeine, meat and processed food, and associated treatments such as lymphatic drainage and massage.
Dr Ferguson used clinical cases to illustrate principles and pitfalls of withdrawal management. Since this is often undertaken in private with minimal problems and no interventions at all, she chose to deal with the more complicated cases such as those with dual diagnosis, dual or triple dependency and/or chronic illnesses.
The first case was a 47 year old labourer who had relapsed after 3 years opioid abstinence. On presentation he was using MS Contin (slow-release morphine) 100mg to 500mg injected each day, to a maximum of up to 800mg in the 16 hrs before admission, with no withdrawal symptoms. He was also taking 10-15 x 5mg diazepam tabs daily (50-75mg daily). He was agitated and tremulous on arrival at the detox unit.
The early signs of irritability, anxiety and enlarged pupils (possibly due to general sympathomimetic arousal) were attributed to benzodiazepine withdrawal, where onset of symptoms is typically after 16 hours or so. Tremor is unusual as a symptom of opioid withdrawal, and might help point to benzodiazepine withdrawal.
The benzodiazepine withdrawal regime at McKinnon Unit is to give 20mg diazepam 2nd hourly, to a maximum of 80mg in 24 hours, reducing to 60mg daily, then 35mg daily, 20mg daily then nil. Dr Ferguson told us that formal scoring of benzodiazepine withdrawal has not been shown to have any predictive value.
Regarding opiate withdrawal there are usually early signs such as enlarged pupils, sweating, pallor, agitation, goose flesh, lacrimation and runny nose. After that, nausea, melancholia and hyperalgesia can occur. At 36-48 hours, abdominal cramps, nausea, diarrhoea, mild leg aches are seen. By this stage, the enlarged pupils usually settle. Beyond this time, at 48-72 hours, there is more prominent aching of the leg and back muscles, abdominal pain and diarrhoea.
For opiate withdrawals at McKinnon Unit the regimen is to give buprenorphine sub-lingual tablets 4mg +4mg+4mg in the first 24 hours. However, with a poor response to this drug initially, this patient needed a further 4mg making 16mg in the first day off heroin. (four-times daily buprenorphine dosing has more to do with service related issues than evidence base).
In this case the patient suffered a protracted withdrawal syndrome, with the need to reintroduce buprenorphine on day 11. This was probably due to the mixed withdrawal syndrome, and possibly inadequately treatment of the opioid withdrawals early on. It may be that buprenorphine doesn't quite have the "grunt" to provide adequate symptom control in some patients.
The second case was a 24 year old methamphetamine-dependent man with schizophrenia, who lived with his family and was on disability support pension. He was taking quetiapine (Seroquel) 600mg bd, amisolpride (Solian) 800mg daily, citalopram (Cipramil) 40 mg daily, and had also been smoking a gram of �ice� daily for 8 months and taking alprazolam (Xanax) 2mg bd � prescribed by a GP.
Withdrawal symptoms of agitation, hallucinations and religious preoccupation settled with diazepam 60mg in 24 hours. He then slept, was quiet and left against medical advice after 4 days, clearly unhappy with continuing treatment (and diazepam had been reduced significantly by then).
Dr Ferguson posed the question of whether there is a withdrawal period from amphetamine use at all, or whether it is just a �recovery period�. Hence symptomatic treatment for agitation and sleeplessness may be provided with medications such as chlorpromazine, olanzapine and/or diazepam: there is some evidence of amphetamine users accessing olanzapine (Zyprexa), as well as the more commonly available benzodiazepines, for self-medication of the amphetamine "come-down". The only thing known to help profound listlessness would be to extend the stimulant use, something Australian doctors are mostly not yet comfortable doing. However, the period of �come-down� is always self limited if the patient can remain drug free.
The third case was a man aged 45 yrs with hep C, cirrhosis, diabetes and leg ulcers who had been drinking 90 to 120g alcohol daily with up to 15 x 5mg tabs diazepam daily. Single and on a pension, he was still looking after his 13 year old daughter. He was a heavy tobacco smoker as well as using injected heroin every 2 weeks on �pay day�.
The case illustrated how comorbid medical problems can have similar signs to alcohol withdrawal, including elevation of body temperature, and how to discriminate with a proper medical evaluation including blood counts and biochemical measures. Other issues were the need for nicotine replacement for tobacco withdrawal; whether agitation might be due to nicotine replacement or nicotine withdrawal; possible advantages of oxazepam over diazepam for severe liver failure with impaired hepatic drug metabolism (risk of over-sedation from accumulation of diazepam); a lower need for diazepam when unwell or drowsy.
A mild Alcohol Withdrawal Syndrome may not need any medication within the first 24 hours, after 2-3 days symptoms of anxiety, sweaty, headaches, insomnia, tremor, mild hypertension and tachycardia may be present. �Generally symptoms are mild and require little in way of medication� however medication eases withdrawal and improves outcomes - diazepam and thiamine are the mainstay. There is no evidence of benefit from more than 100mg thiamine daily, however at least the first dose should be given intramuscularly, as after heavy alcohol use there may be chronic or acute diarrhoea, and oral absorption is often poor. For severe intoxication / withdrawal, for example for drinkers of methylated spirits, 100mg thiamine should be given intramuscularly for at least 3 days.
More severe symptoms are dehydration, diarrhoea, anorexia, nausea, vomiting and weakness and very severe cases may have hypertension (diastolic of 120mmHg or greater can require antihypertensives) panic attacks, marked tremors, fever (however true fever is rare unless with an infectious cause). Seizures and delirium are a sign of treatment failure and should not occur when proper medical treatment available.
Alcohol withdrawals can occur with relatively high blood alcohol levels in heavy drinkers, including those who have reduced their use, so one needs to assess baseline use and more recent use.
Alcohol Withdrawal Scales (AWS) are subjective, with infection/fever and other illnesses as potential confounders, and need to be used thoughtfully and in context. Further, AWS has poor correlation with BP/pulse. Providing diazepam only when AWS >5 means people can be significantly uncomfortable before can get treatment. A kinder alternative may be to treat as soon as the BP is elevated or at the first sign of tremor.
The issue of using vigabantrin (Sabril) for alcohol withdrawal was raised as it may have fewer side effects but is currently only approved for resistant epilepsy.
A fourth case was then described of recurrent withdrawal episodes in a 47 year old alcohol and opiate dependent man on pension living alone in a rental flat, a history of depression and hypothyroidism, and more than 10 admissions to hospitals in 12 months, usually through casualty distressed and unable to cope, out of medication in withdrawal, anxious, but also with several falls and injuries, complicated by MRSA infection, and recently shortness of breath with a possible myocardial infarction.
After prolonged withdrawals (80mgs diazepam for 3 days then reducing over 10 days) he was unable to go to rehabilitation as he was overwhelmed and unable to organise himself.
Issues raise by this case were: therapeutic nihilism - where feelings of despair, hopelessness in treatment providers augment the client's feelings of guilt, shame and hopelessness; and the �GOMER� (get out of my emergency room) syndrome. The patient had some cognitive impairment but not so much to need involvement of the Guardianship Board to manage his affairs. Under the NSW Inebriates Act there has been a trial at Nepean Hospital of compulsory treatment for 2 weeks, with another 2 weeks following where necessary. Patients can also be sent to gazetted Psychiatric Hospital beds. This is not feasible for the great majority.
In general the patient needs to initiate treatment, and we need to recognise and accept the limits of what we can do, focus on symptom management not demand management and have a clear consensus of treatment aims, an agreed plan of treatment and a opt out phase.
Dr Ferguson described protocols for withdrawal management at Rozelle Hospital.
Opiate dependency: - buprenorphine 8-12 mg sublingual per day for 3-5 days, depending on opiate type and quantity. Reduce to 8/6/4/2/2 for last 2days. Symptomatic relief with metoclopramide (Maxalon), hyosine (Buscopan), diazepam (Valium).
Alcohol: - diazepam (Valium), dose not set, related to dispensing and review issues, maybe 40mg/day and metoclopramide (Maxolon) and antihypertensive.
Cannabis/THC: Symptoms of insomnia, agitation, irritable, appetite change, lasting 1-5 days, for which benzodiazepines - at lower doses than for alcohol withdrawal - , olanzapine (Zyprexa), mirtazapine (Avanza) may be used. There seems to be a consensus not to do inpatient withdrawal for THC, but McKinnon will do it for failed (and well documented) outpatient withdrawal.
In order to access their services, there needs to be a phone assessment of demographics (do they live in the right area?); drug use and co-morbidities; negotiation of a treatment plan (which MAY include withdrawal medication options) and then articulation of the plan: for admission (the person must phone daily at 7am until they can secure a place for admission); and/or outpatient appointments; documentation for MMT/BMT; mental health assessment; and/or other requirements eg plans for subsequent rehabilitation programs.
Some predictors of failure ambulatory treatment (as an outpatient) are (1) poor support of abstinence; (2) poor housing (or no housing); (3) multiple drug use, including withdrawal from one substance and use of others (except nicotine); (4) or severe symptoms of withdrawal.
The question was raised why drug and alcohol practitioners in the community may have difficulty "referring" their patients to "detox" units, and do not receive discharge summaries as from most other hospital services. One answer may lie in the historical development of hospital drug and alcohol services using a psychiatric care model, with a primary client orientation and team based case, as well as possibly some resistance among nursing staff to perceived medical paternalism. Another may be that referring doctors have not acquainted themselves with the protocols of the "detox" unit.
In the second half there were a few case vignettes and selected scenarios:
"I went into hospital to come off alcohol and benzos, and they just gave me Normison and sent me home on the 3rd day ...". This was a 41yo woman with history of alcohol withdrawal fits, alcoholic hepatitis. Some questions raised were:
1. If someone has a history of having fits while taking benzodiazepines, do they need admission for withdrawal management? A. not necessarily
2. Why does anyone need to go into a detox unit to come off benzodiazepines? Surely you can just change them over to diazepam and reduce the dose, in the community. A: supervision issues.
Evidently this patient�s symptoms were assessed as mild in the first 48 hours, predicting little risk of complicated benzodiazepine withdrawal. However it appears to be an early discharge for alcohol withdrawal, depending on the alcohol use history given.
"I get fits when I stop alcohol, but I'm not going back to that detox place - can't you just give me some Valium, Doc?" This was a 54 yo man on methadone, with hepatitis C, cirrhosis and ascites, presenting to a doctor in the community, with blood alcohol 0.06 and withdrawal symptoms of agitation and marked tremor. As alcohol withdrawal is dangerous, Dr Ferguson considered it medically strongly indicated to give some diazepam. However, some doctors may feels apprehensive about medico-legal consequences of giving diazepam to an intoxicated patient outside a supervised setting. It may be safest in small quantities, especially if supervised at the surgery, clinic or pharmacy.
"I need to go somewhere to come off cannabis, but the rehab won't take me because I'm on methadone, and the detox unit say they don't do cannabis withdrawal...." - it was agreed that some people may need to remove themselves from a high exposure environment to stop cannabis use, and this may be difficult when the person in on MMT. Some "detox" units offer this service, while for others it is considered low priority.
Andrew Byrne posed the question of when and why detoxification units started giving opiates to opiate addicts. Previously it was rather unusual, if not unheard of, rather like giving hospital brandy to alcoholics who were drying out. This changed the nature of the treatment from detoxification to �re-toxification� in many or even most opiate admissions. This can even be the case in those intent on short-term abstinence. Especially with a very long acting drug such as buprenorphine, it ensures that detoxification does not even start until a few days after leaving the ward, quite the opposite of the traditional position. The practice does offer patients a �taste� of one maintenance treatment yet this they could just as easily obtain as out-patients, and most opiate addicts have tried such approaches already. This change in treatment policy seems to have happened without any discussion or most importantly, input from drug users themselves. Dr Ferguson explained that compliance and retention are now better after the introduction of buprenorphine. Yet it is hard to understand how this brings patients closer to the goal of opiate abstinence.
Presenter: Dr Joanne Ferguson, FRANZCP, FAChAM, staff specialist psychiatrist, Rozelle Hospital. Medical Director, McKinnon Unit.
Topic: Withdrawal management and detoxification-with a focus on complicated patients. [Although this was based on a talk given by Dr Ferguson, the summary also includes audience discussion and input from the three authors.]
Dr Ferguson stressed that the McKinnon Unit is not a �detoxification� ward but a medical unit which manages drug and alcohol withdrawals. The term detoxification is commonly used to refer to "chemicals, drugs, and food additives in the processed foods that we eat....", so that the general public, as well as our patients, may conceptualise drug withdrawal as a removal of such toxins: bringing to mind colonic irrigation, detox diets like Lemon Detox, herbal laxatives and high-fibre diets eliminating caffeine, meat and processed food, and associated treatments such as lymphatic drainage and massage.
Dr Ferguson used clinical cases to illustrate principles and pitfalls of withdrawal management. Since this is often undertaken in private with minimal problems and no interventions at all, she chose to deal with the more complicated cases such as those with dual diagnosis, dual or triple dependency and/or chronic illnesses.
The first case was a 47 year old labourer who had relapsed after 3 years opioid abstinence. On presentation he was using MS Contin (slow-release morphine) 100mg to 500mg injected each day, to a maximum of up to 800mg in the 16 hrs before admission, with no withdrawal symptoms. He was also taking 10-15 x 5mg diazepam tabs daily (50-75mg daily). He was agitated and tremulous on arrival at the detox unit.
The early signs of irritability, anxiety and enlarged pupils (possibly due to general sympathomimetic arousal) were attributed to benzodiazepine withdrawal, where onset of symptoms is typically after 16 hours or so. Tremor is unusual as a symptom of opioid withdrawal, and might help point to benzodiazepine withdrawal.
The benzodiazepine withdrawal regime at McKinnon Unit is to give 20mg diazepam 2nd hourly, to a maximum of 80mg in 24 hours, reducing to 60mg daily, then 35mg daily, 20mg daily then nil. Dr Ferguson told us that formal scoring of benzodiazepine withdrawal has not been shown to have any predictive value.
Regarding opiate withdrawal there are usually early signs such as enlarged pupils, sweating, pallor, agitation, goose flesh, lacrimation and runny nose. After that, nausea, melancholia and hyperalgesia can occur. At 36-48 hours, abdominal cramps, nausea, diarrhoea, mild leg aches are seen. By this stage, the enlarged pupils usually settle. Beyond this time, at 48-72 hours, there is more prominent aching of the leg and back muscles, abdominal pain and diarrhoea.
For opiate withdrawals at McKinnon Unit the regimen is to give buprenorphine sub-lingual tablets 4mg +4mg+4mg in the first 24 hours. However, with a poor response to this drug initially, this patient needed a further 4mg making 16mg in the first day off heroin. (four-times daily buprenorphine dosing has more to do with service related issues than evidence base).
In this case the patient suffered a protracted withdrawal syndrome, with the need to reintroduce buprenorphine on day 11. This was probably due to the mixed withdrawal syndrome, and possibly inadequately treatment of the opioid withdrawals early on. It may be that buprenorphine doesn't quite have the "grunt" to provide adequate symptom control in some patients.
The second case was a 24 year old methamphetamine-dependent man with schizophrenia, who lived with his family and was on disability support pension. He was taking quetiapine (Seroquel) 600mg bd, amisolpride (Solian) 800mg daily, citalopram (Cipramil) 40 mg daily, and had also been smoking a gram of �ice� daily for 8 months and taking alprazolam (Xanax) 2mg bd � prescribed by a GP.
Withdrawal symptoms of agitation, hallucinations and religious preoccupation settled with diazepam 60mg in 24 hours. He then slept, was quiet and left against medical advice after 4 days, clearly unhappy with continuing treatment (and diazepam had been reduced significantly by then).
Dr Ferguson posed the question of whether there is a withdrawal period from amphetamine use at all, or whether it is just a �recovery period�. Hence symptomatic treatment for agitation and sleeplessness may be provided with medications such as chlorpromazine, olanzapine and/or diazepam: there is some evidence of amphetamine users accessing olanzapine (Zyprexa), as well as the more commonly available benzodiazepines, for self-medication of the amphetamine "come-down". The only thing known to help profound listlessness would be to extend the stimulant use, something Australian doctors are mostly not yet comfortable doing. However, the period of �come-down� is always self limited if the patient can remain drug free.
The third case was a man aged 45 yrs with hep C, cirrhosis, diabetes and leg ulcers who had been drinking 90 to 120g alcohol daily with up to 15 x 5mg tabs diazepam daily. Single and on a pension, he was still looking after his 13 year old daughter. He was a heavy tobacco smoker as well as using injected heroin every 2 weeks on �pay day�.
The case illustrated how comorbid medical problems can have similar signs to alcohol withdrawal, including elevation of body temperature, and how to discriminate with a proper medical evaluation including blood counts and biochemical measures. Other issues were the need for nicotine replacement for tobacco withdrawal; whether agitation might be due to nicotine replacement or nicotine withdrawal; possible advantages of oxazepam over diazepam for severe liver failure with impaired hepatic drug metabolism (risk of over-sedation from accumulation of diazepam); a lower need for diazepam when unwell or drowsy.
A mild Alcohol Withdrawal Syndrome may not need any medication within the first 24 hours, after 2-3 days symptoms of anxiety, sweaty, headaches, insomnia, tremor, mild hypertension and tachycardia may be present. �Generally symptoms are mild and require little in way of medication� however medication eases withdrawal and improves outcomes - diazepam and thiamine are the mainstay. There is no evidence of benefit from more than 100mg thiamine daily, however at least the first dose should be given intramuscularly, as after heavy alcohol use there may be chronic or acute diarrhoea, and oral absorption is often poor. For severe intoxication / withdrawal, for example for drinkers of methylated spirits, 100mg thiamine should be given intramuscularly for at least 3 days.
More severe symptoms are dehydration, diarrhoea, anorexia, nausea, vomiting and weakness and very severe cases may have hypertension (diastolic of 120mmHg or greater can require antihypertensives) panic attacks, marked tremors, fever (however true fever is rare unless with an infectious cause). Seizures and delirium are a sign of treatment failure and should not occur when proper medical treatment available.
Alcohol withdrawals can occur with relatively high blood alcohol levels in heavy drinkers, including those who have reduced their use, so one needs to assess baseline use and more recent use.
Alcohol Withdrawal Scales (AWS) are subjective, with infection/fever and other illnesses as potential confounders, and need to be used thoughtfully and in context. Further, AWS has poor correlation with BP/pulse. Providing diazepam only when AWS >5 means people can be significantly uncomfortable before can get treatment. A kinder alternative may be to treat as soon as the BP is elevated or at the first sign of tremor.
The issue of using vigabantrin (Sabril) for alcohol withdrawal was raised as it may have fewer side effects but is currently only approved for resistant epilepsy.
A fourth case was then described of recurrent withdrawal episodes in a 47 year old alcohol and opiate dependent man on pension living alone in a rental flat, a history of depression and hypothyroidism, and more than 10 admissions to hospitals in 12 months, usually through casualty distressed and unable to cope, out of medication in withdrawal, anxious, but also with several falls and injuries, complicated by MRSA infection, and recently shortness of breath with a possible myocardial infarction.
After prolonged withdrawals (80mgs diazepam for 3 days then reducing over 10 days) he was unable to go to rehabilitation as he was overwhelmed and unable to organise himself.
Issues raise by this case were: therapeutic nihilism - where feelings of despair, hopelessness in treatment providers augment the client's feelings of guilt, shame and hopelessness; and the �GOMER� (get out of my emergency room) syndrome. The patient had some cognitive impairment but not so much to need involvement of the Guardianship Board to manage his affairs. Under the NSW Inebriates Act there has been a trial at Nepean Hospital of compulsory treatment for 2 weeks, with another 2 weeks following where necessary. Patients can also be sent to gazetted Psychiatric Hospital beds. This is not feasible for the great majority.
In general the patient needs to initiate treatment, and we need to recognise and accept the limits of what we can do, focus on symptom management not demand management and have a clear consensus of treatment aims, an agreed plan of treatment and a opt out phase.
Dr Ferguson described protocols for withdrawal management at Rozelle Hospital.
Opiate dependency: - buprenorphine 8-12 mg sublingual per day for 3-5 days, depending on opiate type and quantity. Reduce to 8/6/4/2/2 for last 2days. Symptomatic relief with metoclopramide (Maxalon), hyosine (Buscopan), diazepam (Valium).
Alcohol: - diazepam (Valium), dose not set, related to dispensing and review issues, maybe 40mg/day and metoclopramide (Maxolon) and antihypertensive.
Cannabis/THC: Symptoms of insomnia, agitation, irritable, appetite change, lasting 1-5 days, for which benzodiazepines - at lower doses than for alcohol withdrawal - , olanzapine (Zyprexa), mirtazapine (Avanza) may be used. There seems to be a consensus not to do inpatient withdrawal for THC, but McKinnon will do it for failed (and well documented) outpatient withdrawal.
In order to access their services, there needs to be a phone assessment of demographics (do they live in the right area?); drug use and co-morbidities; negotiation of a treatment plan (which MAY include withdrawal medication options) and then articulation of the plan: for admission (the person must phone daily at 7am until they can secure a place for admission); and/or outpatient appointments; documentation for MMT/BMT; mental health assessment; and/or other requirements eg plans for subsequent rehabilitation programs.
Some predictors of failure ambulatory treatment (as an outpatient) are (1) poor support of abstinence; (2) poor housing (or no housing); (3) multiple drug use, including withdrawal from one substance and use of others (except nicotine); (4) or severe symptoms of withdrawal.
The question was raised why drug and alcohol practitioners in the community may have difficulty "referring" their patients to "detox" units, and do not receive discharge summaries as from most other hospital services. One answer may lie in the historical development of hospital drug and alcohol services using a psychiatric care model, with a primary client orientation and team based case, as well as possibly some resistance among nursing staff to perceived medical paternalism. Another may be that referring doctors have not acquainted themselves with the protocols of the "detox" unit.
In the second half there were a few case vignettes and selected scenarios:
"I went into hospital to come off alcohol and benzos, and they just gave me Normison and sent me home on the 3rd day ...". This was a 41yo woman with history of alcohol withdrawal fits, alcoholic hepatitis. Some questions raised were:
1. If someone has a history of having fits while taking benzodiazepines, do they need admission for withdrawal management? A. not necessarily
2. Why does anyone need to go into a detox unit to come off benzodiazepines? Surely you can just change them over to diazepam and reduce the dose, in the community. A: supervision issues.
Evidently this patient�s symptoms were assessed as mild in the first 48 hours, predicting little risk of complicated benzodiazepine withdrawal. However it appears to be an early discharge for alcohol withdrawal, depending on the alcohol use history given.
"I get fits when I stop alcohol, but I'm not going back to that detox place - can't you just give me some Valium, Doc?" This was a 54 yo man on methadone, with hepatitis C, cirrhosis and ascites, presenting to a doctor in the community, with blood alcohol 0.06 and withdrawal symptoms of agitation and marked tremor. As alcohol withdrawal is dangerous, Dr Ferguson considered it medically strongly indicated to give some diazepam. However, some doctors may feels apprehensive about medico-legal consequences of giving diazepam to an intoxicated patient outside a supervised setting. It may be safest in small quantities, especially if supervised at the surgery, clinic or pharmacy.
"I need to go somewhere to come off cannabis, but the rehab won't take me because I'm on methadone, and the detox unit say they don't do cannabis withdrawal...." - it was agreed that some people may need to remove themselves from a high exposure environment to stop cannabis use, and this may be difficult when the person in on MMT. Some "detox" units offer this service, while for others it is considered low priority.
Andrew Byrne posed the question of when and why detoxification units started giving opiates to opiate addicts. Previously it was rather unusual, if not unheard of, rather like giving hospital brandy to alcoholics who were drying out. This changed the nature of the treatment from detoxification to �re-toxification� in many or even most opiate admissions. This can even be the case in those intent on short-term abstinence. Especially with a very long acting drug such as buprenorphine, it ensures that detoxification does not even start until a few days after leaving the ward, quite the opposite of the traditional position. The practice does offer patients a �taste� of one maintenance treatment yet this they could just as easily obtain as out-patients, and most opiate addicts have tried such approaches already. This change in treatment policy seems to have happened without any discussion or most importantly, input from drug users themselves. Dr Ferguson explained that compliance and retention are now better after the introduction of buprenorphine. Yet it is hard to understand how this brings patients closer to the goal of opiate abstinence.
Summary of the evening written by Richard Hallinan, Andrew Byrne, Judith Meldrum with help from Dr Joanne Ferguson�s power point presentation.
4 December 2007
Advances in assessment and treatments for infection with hepatitis C virus (HCV)
Concord Seminar 20th November 2007
Topics: HCV epidemiology; treatment assessment; HCV treatment among methadone patients and current injecting drug users (IDU); strategies to improve HCV treatment outcomes; advances in HCV treatment and new research.
Although there has been a drop in annual HCV notifications in Australia from 15,000 in the mid 1990s to 13,000 recently, it is unsure how much of this reflects a fall in incidence (new infections) and thus a success for existing harm reduction policies. As most HCV infections in injecting drug users (IDU) occur within the first few years of injecting, some more significant indicators may be reductions in new HCV notifications in the 15-19 year age group, and in HCV prevalence in young male IDUs attending needle syringe programs (NSPs) from 2001-2006. Such figures do indeed show a marked reduction, which is reassuring that overall notifications should decline further.
It is possible that the lack of a fall in HCV prevalence in young female IDUs may reflect their "going second" in shared injecting situations, and/or sometimes having older male partners already at higher risk of having HCV.
IDUs still constituted the majority (62%) of all acute or newly acquired infections in Australia (n = 474 in 2006), however this may be an underestimate as the source of infection is reported as unknown in 15%, and sexual in 5% (sexual transmission may occur where sexual practices involve blood but is unlikely in most "vanilla" sexual encounters / relationships). Tattoos account for about 8% and occupational exposure 2.5% of new cases.
Overall HCV seroprevalence in people attending NSP remains high at 65%, and is somewhat higher again (75%) in MMT/BMT populations: ie about 30,000 of the circa 40,000 people in opioid replacement treatment in Australia. Of these, probably about 20,000 (50%) have chronic HCV (RNA-positive), about 10% of the total in Australia, making this an important point of access for HCV treatment.
Mortality among people with HCV in Australia has a bimodal distribution, in the 5th and 8th decades of life, the former largely related to drug-related deaths among IDUs and the latter liver disease-related deaths in people born overseas, in HCV endemic areas. Liver disease-related deaths have risen since 1999, a trend perhaps "unmasked" by a fall of direct drug-related deaths as a result of the "heroin shortage".
With cases of HCV cirrhosis in Australia predicted to rise to 12,000 by 2010, and twice that number by 2020, an aim is to be treating 6,000 people/year for HCV. Since April 2006, when the liver biopsy requirement for interferon-based treatment was dropped, treatment figures have risen from about 2,000 to 3,000/year. Liver biopsy was a major disincentive for many people.
Sustained viral response SVR (persisting absence of viral RNA 6 months after treatment) is usually considered a cure of the viral infection, although not necessarily of the underlying liver damage. Occasional later relapses of HCV may represent reinfection with HCV in IDU. Over the last decade response rates to interferon-based treatment have improved, from about 10% SVR for interferon monotherapy to overall to over 60% SVR for combined pegylated interferon/ribavirin (PEG-IFN/RBV), ranging from 50 � 80% depending on genotype.
Early studies of PEG-IFN�2a/RBV showed benefit of longer treatment (48 versus 24 weeks) and bodyweight-adjusted ribavirin dosing (up to 1200mg/day) for genotype 1, but not for genotypes 2 and 3. While early viral response (EVR) - defined as RNA undetectable or >99% decline in viral load at 12 weeks - increases the chances of SVR for genotype 1 to 72%, failure to achieve EVR almost inevitably predicts treatment failure.
The bottom line for treatment is: 24 weeks PEG-IFN/RBV for genotypes 2 and 3; 48 weeks for genotype 1 if the person achieves EVR at 12 weeks. There is no evidence of any difference in efficacy between PEG-IFN�2a (Roche) and PEG-IFN�2b (Schering-Plough).
Recent analysis suggests that people with genotype 1 who have a Rapid Viral Response (RVR) - HCV RNA undetectable at 4 weeks - may do just as well with 24 weeks as 48 weeks of PEG-IFN�2a/RBV, achieving SVR rates above 80%.
At St Vincent�s Hospital in Darlinghurst, treatment completion rates rose from 55% 2000-02 to 74% in 2003-04, with drops in treatment discontinuations due to both non-response and to toxicity. This appears a trend to improvements in delivery of treatment.
Results of treatment in current injectors are comparable to results among non injectors, and abstinence from IDU is not a pre-condition for subsidised treatment in Australia: nor are stage of fibrosis (was pre-2006); elevated ALT (was pre-2006); the presence of symptoms; low alcohol intake.
There is some evidence of poorer treatment outcomes in people who continue to drink alcohol, but whether this is related to worsened treatment adherence or effects on viral replication is unclear.
The current conditions for subsidised treatment eligibility in Australia (S100 Criteria) are:
� 18 years or older
� No evidence of de-compensated cirrhosis
� Must have chronic HCV infection (>6 months)
� Use double contraception where the patient is either a woman of child-bearing years or their male partner.
� No prior IFN-based HCV treatment
Subsidised treatment costs the patient about A$30/month, (A$5/month for concession card holders) and this is probably as cheap as anywhere in the world.
To be balanced against the curative potential of PEG-IFN/RBV are its toxicity (flu-like symptoms, depression, anaemia, lethargy) and the requirement for contraception during and 6 months following treatment. Apart from treatment eligibility, the stage of liver disease and prognosis the genotype and viral load, presence of co-morbidities, and work and family obligations have to be considered in treatment decision-making. There needs to be at least some treatment willingness and relative socio-behavioural stability, however with persistence and good support people with relative treatment contraindications can often be successfully brought through treatment.
Greg Dore advocates some targeting of individuals with higher risk of progressive disease:
Higher likelihood of cirrhosis is predicted by:
� older age (> 40 years)
� duration of infection > 20 years
� heavy alcohol intake
� HIV or chronic HBV coinfection
� peripheral stigmata of CLD (spider naevi, palmar erythema)
� impaired hepatic synthetic function (low albumin, prolonged PT)
� AST / ALT ratio > 1.0
� AST / platelet ratio > 1.0 (<0.5 very unlikely to have cirrhosis)
At the Byrne Surgery, about 50% of people with chronic HCV met similar criteria for higher risk of HCV progression, and have been specifically targeted for treatment, with 27 people having been treated since 2003. Of 20 liver biopsies among these higher risk people, 18 had at least moderate liver fibrosis.
Although HIV and HBV co-infection are relatively uncommon in people with HCV infection, they are definite indicators of higher risk, and in many cases HCV treatment should be undertaken before HIV or HBV treatment.
Phase II trials suggest benefit from triple therapies of IFN/RBV with protease inhibitors for chronic HCV and Phase II trials are due to start soon.
Acute HCV can be treated with interferon monotherapy, with SVR rates of 80-90% in 3 months treatment, unless there is HIV co-infection or HCV genotype 1 with a high viral load. However, as about 25% of people spontaneously clear the virus (generally in the first 3 months after infection but up to 6 months and even later in a few cases) treatment of acute infection is usually deferred at least 3 months.
Although sustained viral response rates at the Byrne surgery are high (71% overall, 81% for genotype 2/3) a case was presented to show that things are not always easy. This long-term MMT patient received HCV antiviral treatment in the setting of micronodular cirrhosis, Genotype 1a/1b, viral load 360,000 and pre-treatment alcohol use of 30-60g/day. This patient was overweight 105kg, a smoker (10 cigs/day) with shortness of breath on exertion, chronic airflow limitation (not taking medications), hypertension (Enalapril), probable ischaemic heart disease (chest tightness on stress test but no ECG changes; echocardiogram: LVH with moderate dilatation), osteoarthritis (diclofenac prn), a history of peptic ulcer disease (uses omeprazole prn).
Despite these relative contraindications to treatment, this patient ceased drinking alcohol, and started combination treatment with IFN.2a/RBV, achieving rapid viral response (<600 ie qualitative RNA assay) at 5 weeks. RBV dose started with 1200mg/day and reducing to 800mg/day as haemoglobin dropped under 100, and was stopped for 5 weeks when the patient suffered severe nosebleeds (with normal BP 130/80; prothrombin time 1.1 and platelets acceptable at 81). Diclofenac was ceased, and ENT review showed a large vessel on the septum which was cauterised, packed with Chloromycetin for 3 days, with ongoing Vaseline use.
After the patient had stoically endured 36 weeks of IFN.2a/RBV, and in view of the apparent rapid viral response, treatment was stopped at week 36, sadly with a rapid ALT and viral flare. The patient has since maintained alcohol abstinence and long term low dose interferon treatment is being considered.
Issues arising from this case were the feasibility of treatment of "brittle" patients; drying of the nasal mucosa with the IFN/RBV; the pros and cons of NSAIDS for osteoarthritis in this situation; the possibility of viral escape with the interruption to RBV treatment and the wisdom of the decision to stop treatment early; whether endoscopy might have been done to exclude oesophageal varices before treatment; the benefits of going on the front foot in treating HCV in substance dependent people, who may rise to the challenge by achieving abstinence (in this case alcohol abstinence).
Other questions arising in the second half:
Q. What about treating people with persistently high-normal ALT? A: there is some discussion about whether ALT reference ranges should be lowered, especially for women. A single normal ALT measurement is not helpful, as ALT typically waxes and wanes in chronic HCV, so ongoing monitoring at least is required. Although one would rather have a persistently lowish than a persistently very high ALT, ALT correlates poorly with disease activity, and the duration of HCV is an important consideration in assessing risk of disease progression.
Q. What is the role of abdominal ultrasound in assessing chronic HCV? A: mainly to exclude portal hypertension. Greg Dore often does not order this test. Newer methods for assessing fibrosis/cirrhosis by measuring the stiffness of the liver may make ultrasound more useful.
Presenter: Professor Greg Dore, Viral Hepatitis Clinical Research Program, National Centre in HIV Epidemiology and Clinical Research.
Topics: HCV epidemiology; treatment assessment; HCV treatment among methadone patients and current injecting drug users (IDU); strategies to improve HCV treatment outcomes; advances in HCV treatment and new research.
Although there has been a drop in annual HCV notifications in Australia from 15,000 in the mid 1990s to 13,000 recently, it is unsure how much of this reflects a fall in incidence (new infections) and thus a success for existing harm reduction policies. As most HCV infections in injecting drug users (IDU) occur within the first few years of injecting, some more significant indicators may be reductions in new HCV notifications in the 15-19 year age group, and in HCV prevalence in young male IDUs attending needle syringe programs (NSPs) from 2001-2006. Such figures do indeed show a marked reduction, which is reassuring that overall notifications should decline further.
It is possible that the lack of a fall in HCV prevalence in young female IDUs may reflect their "going second" in shared injecting situations, and/or sometimes having older male partners already at higher risk of having HCV.
IDUs still constituted the majority (62%) of all acute or newly acquired infections in Australia (n = 474 in 2006), however this may be an underestimate as the source of infection is reported as unknown in 15%, and sexual in 5% (sexual transmission may occur where sexual practices involve blood but is unlikely in most "vanilla" sexual encounters / relationships). Tattoos account for about 8% and occupational exposure 2.5% of new cases.
Overall HCV seroprevalence in people attending NSP remains high at 65%, and is somewhat higher again (75%) in MMT/BMT populations: ie about 30,000 of the circa 40,000 people in opioid replacement treatment in Australia. Of these, probably about 20,000 (50%) have chronic HCV (RNA-positive), about 10% of the total in Australia, making this an important point of access for HCV treatment.
Mortality among people with HCV in Australia has a bimodal distribution, in the 5th and 8th decades of life, the former largely related to drug-related deaths among IDUs and the latter liver disease-related deaths in people born overseas, in HCV endemic areas. Liver disease-related deaths have risen since 1999, a trend perhaps "unmasked" by a fall of direct drug-related deaths as a result of the "heroin shortage".
With cases of HCV cirrhosis in Australia predicted to rise to 12,000 by 2010, and twice that number by 2020, an aim is to be treating 6,000 people/year for HCV. Since April 2006, when the liver biopsy requirement for interferon-based treatment was dropped, treatment figures have risen from about 2,000 to 3,000/year. Liver biopsy was a major disincentive for many people.
Sustained viral response SVR (persisting absence of viral RNA 6 months after treatment) is usually considered a cure of the viral infection, although not necessarily of the underlying liver damage. Occasional later relapses of HCV may represent reinfection with HCV in IDU. Over the last decade response rates to interferon-based treatment have improved, from about 10% SVR for interferon monotherapy to overall to over 60% SVR for combined pegylated interferon/ribavirin (PEG-IFN/RBV), ranging from 50 � 80% depending on genotype.
Early studies of PEG-IFN�2a/RBV showed benefit of longer treatment (48 versus 24 weeks) and bodyweight-adjusted ribavirin dosing (up to 1200mg/day) for genotype 1, but not for genotypes 2 and 3. While early viral response (EVR) - defined as RNA undetectable or >99% decline in viral load at 12 weeks - increases the chances of SVR for genotype 1 to 72%, failure to achieve EVR almost inevitably predicts treatment failure.
The bottom line for treatment is: 24 weeks PEG-IFN/RBV for genotypes 2 and 3; 48 weeks for genotype 1 if the person achieves EVR at 12 weeks. There is no evidence of any difference in efficacy between PEG-IFN�2a (Roche) and PEG-IFN�2b (Schering-Plough).
Recent analysis suggests that people with genotype 1 who have a Rapid Viral Response (RVR) - HCV RNA undetectable at 4 weeks - may do just as well with 24 weeks as 48 weeks of PEG-IFN�2a/RBV, achieving SVR rates above 80%.
At St Vincent�s Hospital in Darlinghurst, treatment completion rates rose from 55% 2000-02 to 74% in 2003-04, with drops in treatment discontinuations due to both non-response and to toxicity. This appears a trend to improvements in delivery of treatment.
Results of treatment in current injectors are comparable to results among non injectors, and abstinence from IDU is not a pre-condition for subsidised treatment in Australia: nor are stage of fibrosis (was pre-2006); elevated ALT (was pre-2006); the presence of symptoms; low alcohol intake.
There is some evidence of poorer treatment outcomes in people who continue to drink alcohol, but whether this is related to worsened treatment adherence or effects on viral replication is unclear.
The current conditions for subsidised treatment eligibility in Australia (S100 Criteria) are:
� 18 years or older
� No evidence of de-compensated cirrhosis
� Must have chronic HCV infection (>6 months)
� Use double contraception where the patient is either a woman of child-bearing years or their male partner.
� No prior IFN-based HCV treatment
Subsidised treatment costs the patient about A$30/month, (A$5/month for concession card holders) and this is probably as cheap as anywhere in the world.
To be balanced against the curative potential of PEG-IFN/RBV are its toxicity (flu-like symptoms, depression, anaemia, lethargy) and the requirement for contraception during and 6 months following treatment. Apart from treatment eligibility, the stage of liver disease and prognosis the genotype and viral load, presence of co-morbidities, and work and family obligations have to be considered in treatment decision-making. There needs to be at least some treatment willingness and relative socio-behavioural stability, however with persistence and good support people with relative treatment contraindications can often be successfully brought through treatment.
Greg Dore advocates some targeting of individuals with higher risk of progressive disease:
Higher likelihood of cirrhosis is predicted by:
� older age (> 40 years)
� duration of infection > 20 years
� heavy alcohol intake
� HIV or chronic HBV coinfection
� peripheral stigmata of CLD (spider naevi, palmar erythema)
� impaired hepatic synthetic function (low albumin, prolonged PT)
� AST / ALT ratio > 1.0
� AST / platelet ratio > 1.0 (<0.5 very unlikely to have cirrhosis)
At the Byrne Surgery, about 50% of people with chronic HCV met similar criteria for higher risk of HCV progression, and have been specifically targeted for treatment, with 27 people having been treated since 2003. Of 20 liver biopsies among these higher risk people, 18 had at least moderate liver fibrosis.
Although HIV and HBV co-infection are relatively uncommon in people with HCV infection, they are definite indicators of higher risk, and in many cases HCV treatment should be undertaken before HIV or HBV treatment.
Phase II trials suggest benefit from triple therapies of IFN/RBV with protease inhibitors for chronic HCV and Phase II trials are due to start soon.
Acute HCV can be treated with interferon monotherapy, with SVR rates of 80-90% in 3 months treatment, unless there is HIV co-infection or HCV genotype 1 with a high viral load. However, as about 25% of people spontaneously clear the virus (generally in the first 3 months after infection but up to 6 months and even later in a few cases) treatment of acute infection is usually deferred at least 3 months.
Although sustained viral response rates at the Byrne surgery are high (71% overall, 81% for genotype 2/3) a case was presented to show that things are not always easy. This long-term MMT patient received HCV antiviral treatment in the setting of micronodular cirrhosis, Genotype 1a/1b, viral load 360,000 and pre-treatment alcohol use of 30-60g/day. This patient was overweight 105kg, a smoker (10 cigs/day) with shortness of breath on exertion, chronic airflow limitation (not taking medications), hypertension (Enalapril), probable ischaemic heart disease (chest tightness on stress test but no ECG changes; echocardiogram: LVH with moderate dilatation), osteoarthritis (diclofenac prn), a history of peptic ulcer disease (uses omeprazole prn).
Despite these relative contraindications to treatment, this patient ceased drinking alcohol, and started combination treatment with IFN.2a/RBV, achieving rapid viral response (<600 ie qualitative RNA assay) at 5 weeks. RBV dose started with 1200mg/day and reducing to 800mg/day as haemoglobin dropped under 100, and was stopped for 5 weeks when the patient suffered severe nosebleeds (with normal BP 130/80; prothrombin time 1.1 and platelets acceptable at 81). Diclofenac was ceased, and ENT review showed a large vessel on the septum which was cauterised, packed with Chloromycetin for 3 days, with ongoing Vaseline use.
After the patient had stoically endured 36 weeks of IFN.2a/RBV, and in view of the apparent rapid viral response, treatment was stopped at week 36, sadly with a rapid ALT and viral flare. The patient has since maintained alcohol abstinence and long term low dose interferon treatment is being considered.
Issues arising from this case were the feasibility of treatment of "brittle" patients; drying of the nasal mucosa with the IFN/RBV; the pros and cons of NSAIDS for osteoarthritis in this situation; the possibility of viral escape with the interruption to RBV treatment and the wisdom of the decision to stop treatment early; whether endoscopy might have been done to exclude oesophageal varices before treatment; the benefits of going on the front foot in treating HCV in substance dependent people, who may rise to the challenge by achieving abstinence (in this case alcohol abstinence).
Other questions arising in the second half:
Q. What about treating people with persistently high-normal ALT? A: there is some discussion about whether ALT reference ranges should be lowered, especially for women. A single normal ALT measurement is not helpful, as ALT typically waxes and wanes in chronic HCV, so ongoing monitoring at least is required. Although one would rather have a persistently lowish than a persistently very high ALT, ALT correlates poorly with disease activity, and the duration of HCV is an important consideration in assessing risk of disease progression.
Q. What is the role of abdominal ultrasound in assessing chronic HCV? A: mainly to exclude portal hypertension. Greg Dore often does not order this test. Newer methods for assessing fibrosis/cirrhosis by measuring the stiffness of the liver may make ultrasound more useful.
Summary by Richard Hallinan, Greg Dore and Andrew Byrne.
3 December 2007
Editorial questions the ethics of naltrexone imlants until they are proven and registered
Degenhardt L, Gibson A, Mattick RP, Hall W. Drug and Alcohol Review 2008 27;1:1-3
Depot naltrexone use for opioid dependence in Australia: large-scale use of an unregistered medication in the absence of data on safety and efficacy.
Dear Colleagues,On page one of Drug and Alcohol Review for January 2008 there is an editorial which condemns the current practice of using customized naltrexone implants before safety and effectiveness data have been obtained. Degenhardt and co-authors reflect the sentiments of many in the field questioning the premature use of various doses of non-standardised pellets of naltrexone sub-cutaneously. After quoting the limited research and normal therapeutic safeguards, they write: �Practitioners who do so run the risk of bringing into disrepute a treatment that we think may well prove to play a useful niche role in the treatment of a small group of highly selected opioid-dependent patients.�In my view it is time to call a moratorium on this treatment. The attractive side of the interest in developing naltrexone implants is that this demonstrates the relentless efforts of researchers to develop more effective, safer and more cost effective treatments for heroin dependence. However, it is important that such a quest follow the basic rules of all medical research, always protecting those taking part in the research.Standard doses of supervised methadone in traditional clinics have always suited a substantial proportion of those addicted to street heroin. Now that we have a second variety of methadone and two types of buprenorphine in Australia, as well as better �matching� of drugs, doses, added supports, etc, these success rates have improved further. Trials utilizing both methadone and buprenorphine as appropriate have shown up to 80% retention at 6 months. About 5% will successfully detoxify each year, still leaving a proportion of drug users either unwilling or unable to cope with existing treatments. Thus these may suit other approaches such as supervised naltrexone tablets, depot injections or implants (or even heroin trials). There are still waiting lists for tradition detoxification services, both medicated and otherwise.Now that John Howard is leaving office Australia may yet get its latter-day drug trial. Even beyond a simple �heroin trial�, we may need some new bold new approaches for alcohol, amphetamine use, depression, suicide and the stresses of modern life. Just as there is some indication that naltrexone may help a certain group of addicts, there has also been some promise in the use of tiagabine, ondansetron, modafinil, long-acting morphine and dexamphetamine. A new drug, varenicline (Champix) is to be released next month on the PBS under similar conditions as Zyban. There is some unconfirmed information that this nicotinic receptor drug may reduce alcohol cravings at the same time.On the subject of the stresses of modern life, I learned of an inspiring talk at the APSAD conference in Auckland last month discussing the �search for wisdom� exemplified by Bob Cloninger in his presentation on "Wellness". This was amplified with great clarity in a lecture on the history of theism by an 89 year old retired professor of theology, Lloyd Geering. He allowed the audience to recognise that in this secular age, we are all now �playing God� ourselves and it is understandably quite stressful. My correspondent said that these �higher themes� spilled out into many of the discussions and set the tone for much of the casual interaction with colleagues at the conference, many of whom were �new� to APSAD being part of the large Kiwi contingent.
Comments by Andrew Byrne ..
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