Why were doctors so slow to recognise antidepressant discontinuation problems? D B Double.

Why were doctors so slow to recognise antidepressant

discontinuation problems? D B Double

Defeat depression campaign

Five-year national campaign launched Jan 1992 by Royal College of Psychiatrists in association with Royal College of General Practitioners


Five-year national campaign launched Jan 1992 by Royal College of Psychiatrists in association with Royal College of General Practitioners

To educate health professionals and public and reduce stigma


Door-to-door survey of public opinion before the campaign started


Door-to-door survey of public opinion before the campaign started

Most of the sample (78%) thought that antidepressants were addictive


Patients should be informed clearly when antidepressants are first prescribed that discontinuing treatment in due course will not be a problem

Warning in British National Formulary since 1990

Symptoms may occur if an antidepressant is stopped suddenly after regular administration for 8 weeks or more.

Warning in British National Formulary since 1990

Symptoms may occur if an antidepressant is stopped suddenly after regular administration for 8 weeks or more.

Case reports of discontinuation reactions have appeared since antidepressants were first introduced

Serotonin specific reuptake inhibitors (SSRIs)

New class of antidepressants introduced into the market in 1987

Serotonin specific reuptake inhibitors (SSRIs)

New class of antidepressants introduced into the market in 1987

Discontinuation symptoms only recognised after the SSRIs had been in widespread clinical use for several years

Recognition of antidepressant discontinuation reactions

Consensus meeting sponsored by Eli Lilly in Phoenix, Arizona, at end of 1996


Consensus meeting sponsored by Eli Lilly in Phoenix, Arizona, at end of 1996

Preventable and simple to treat (BMJ editorial 1998)


Discontinuation symptoms are common (Letter to Lancet 2000)


Discontinuation symptoms are common (Letter to Lancet 2000)

GlaxoSmithKline dropped its insistence that paroxetine is not addictive in 2003

NICE guideline for depression 2004

All patients prescribed antidepressants should be informed that discontinuation/withdrawal symptoms may occur on stopping, missing doses or, occasionally, on reducing the dose of the drug.

Nature of antidepressant discontinuation reactions

No accepted definition of an antidepressant discontinuation syndrome

Nature of antidepressant discontinuation reactions

No accepted definition of an antidepressant discontinuation syndrome

Commonly seen as related to re-regulation of receptors and transporters

Psychological dependence

Negative affect experienced in absence of the drug


Negative affect experienced in absence of the drug

People may form attachments to their medications more because of what they mean to them than what they do


Patients often stay on medications, maybe several at once, even though their actual benefit is questionable


Patients often stay on medications, maybe several at once, even though their actual benefit is questionable

Any change threatens an equilibrium related to a complex set of meanings that their medications have acquired

Doctor does not know best A drug which is thought to improve mood is likely to be habit forming, so however much the medical profession may declare that antidepressants are not primarily reinforcing like psychostimulants, the public understands that there may be problems discontinuing antidepressants

Reasons for defensiveness about discontinuation problems

(1) Doctors concentrate on short-term rather than long-term treatment



(2) Doctors focus on neurobiological rather than psychosocial factors



(2) Doctors focus on neurobiological rather than psychosocial factors

(3) Doctors are biased about the effectiveness of medication

(1) Doctors concentrate on short-

term rather than long-term treatment Medication is often prescribed in life crises reinforcing defensive mechanisms against overwhelming anxiety


term rather than long-term treatment Medication is often prescribed in life crises reinforcing defensive mechanisms against overwhelming anxiety

Power of placebo should be recognised


term rather than long-term treatment We all want a simple, quick, cheap, painless, and complete cure.


term rather than long-term treatment We all want a simple, quick, cheap, painless, and complete cure.

People express reluctance to take drugs, but an inability to be free of them


term rather than long-term treatment There is nothing men will not do … to recover their health and save their lives. They have submitted to be half drowned in water, … half choked with gases, … buried up to their chins in earth, … seared with hot irons like galley slaves, … have needles thrust into their flesh, and bonfires kindled on their skin, to swallow all sorts of abominations, and to pay for all this, as if blisters were a blessing and leeches were luxury. What more can be asked to prove their honesty and sincerity? Oliver Wendell Holmes (1842)


term rather than long-term treatment Mean duration of trials in NICE analysis of SSRIs vs placebo = 6.75 weeks


term rather than long-term treatment Mean duration of trials in NICE analysis of SSRIs vs placebo = 6.75 weeks

Episodic nature of depression means that episodes seem easy to treat


term rather than long-term treatment Discontinuation trials of antidepressants have a substantial relapse rate (92% to 36%)


term rather than long-term treatment Discontinuation trials of antidepressants have a substantial relapse rate (92% to 36%)

Long term prognosis in depression is not good – only 1/5

th recovered

after 15 years


term rather than long-term treatment Distinguishing discontinuation reaction from true relapse is not always clear-cut


term rather than long-term treatment Distinguishing discontinuation reaction from true relapse is not always clear-cut

Expectations are as likely to play a role in discontinuing medication, producing a nocebo reaction


term rather than long-term treatment Some evidence that people treated without antidepressants may do better over the long term


term rather than long-term treatment Some evidence that people treated without antidepressants may do better over the long term

Could antidepressants create a vulnerability to relapse?

(2) Doctors focus on neurobiological

rather than psychosocial factors Commonly believed that mental illness is due to chemical imbalance


rather than psychosocial factors Commonly believed that mental illness is due to chemical imbalance

No rigorous corroboration of the serotonin theory of depression, and a significant body of contradictory evidence


rather than psychosocial factors [No] discernible pathological lesions … that in or of themselves serve as reliable or predictive markers of mental disorder


rather than psychosocial factors [No] discernible pathological lesions … that in or of themselves serve as reliable or predictive markers of mental disorder

BUT mental disorders will eventually be proven to represent disorders of intercellular communication or disrupted neural circuitry APA (2003)


rather than psychosocial factors People are able to understand that the “chemical imbalance theory” is only a theory


rather than psychosocial factors People are able to understand that the “chemical imbalance theory” is only a theory

What they may find more difficult to appreciate is why they are told that this theory has been proven, when this is not the case


rather than psychosocial factors Chemical imbalance theory is used as a means of persuading patients to take medication


rather than psychosocial factors Chemical imbalance theory is used as a means of persuading patients to take medication

People require the expertise of doctors to make sense of the information available to them


rather than psychosocial factors Insanity is "a corporeal disease". … I have never been able to conceive … a disease of the mind.


rather than psychosocial factors Insanity is "a corporeal disease". … I have never been able to conceive … a disease of the mind.

[T]he various and discordant opinions, which have prevailed in this department of knowledge, have led me to disentangle myself as quickly as possible from the perplexity of metaphysical mazes. Haslam (1798)


rather than psychosocial factors View that the phenomena of human existence can be understood in exclusively biological terms is obviously attractive


rather than psychosocial factors View that the phenomena of human existence can be understood in exclusively biological terms is obviously attractive

It is legitimate to question whether an understanding of human nature can take the same form as the laws of natural science


rather than psychosocial factors Biomedical hypothesis is so fundamental to the edifice of psychiatry that “chemical imbalance” theory is still believed despite contrary evidence


rather than psychosocial factors Biomedical hypothesis is so fundamental to the edifice of psychiatry that “chemical imbalance” theory is still believed despite contrary evidence

At its most extreme, biomedical psychiatry reduces the person to a brain that needs its biology cured.


rather than psychosocial factors Suggesting mental illness has a physical basis serves as the justification for psychiatric interventions and institutions


rather than psychosocial factors Suggesting mental illness has a physical basis serves as the justification for psychiatric interventions and institutions

In the UK prescriptions for antidepressants almost tripled in the 11 years up to 2002


rather than psychosocial factors Patients may want antidepressant prescription, but doctors do not appreciate how much they may not


rather than psychosocial factors Patients may want antidepressant prescription, but doctors do not appreciate how much they may not

Doctors should not deceive their patients

(3) Doctors are biased about the

effectiveness of medication Results of thousands of studies of antidepressants are not nearly as conclusive as they are often claimed to be


effectiveness of medication Results of thousands of studies of antidepressants are not nearly as conclusive as they are often claimed to be

About a third of published studies show no difference between antidepressants and placebo


effectiveness of medication Negative studies of antidepressants may not be published


effectiveness of medication Negative studies of antidepressants may not be published

Even in the trials that are published, outcomes are not always reported, particularly if the findings are negative


effectiveness of medication Conclusions in trials funded by drug companies tend to be more positive


effectiveness of medication Conclusions in trials funded by drug companies tend to be more positive

Better quality studies are associated with less treatment effect


effectiveness of medication Mean drug–placebo difference in improvement scores of 1.8 points on the Hamilton Rating Scale of Depression


effectiveness of medication Mean drug–placebo difference in improvement scores of 1.8 points on the Hamilton Rating Scale of Depression

Statistically significant, but of marginal clinical significance (National Institute for Health and Clinical Excellence - NICE)


effectiveness of medication Expectation that medication will produce improvement may itself produce apparent benefit


effectiveness of medication Expectation that medication will produce improvement may itself produce apparent benefit

To prevent expectations influencing outcome the trial is conducted “double-blind”


effectiveness of medication Randomised clinical trials are not as "double-blind" as is commonly assumed


effectiveness of medication Randomised clinical trials are not as "double-blind" as is commonly assumed

Subjects and doctors may be cued in to whether subjects are taking active or placebo medication


effectiveness of medication Both doctors and subjects can guess treatment more accurately than would be predicted by chance


effectiveness of medication Both doctors and subjects can guess treatment more accurately than would be predicted by chance

Degree of unblinding correlates with treatment effect


effectiveness of medication Effect size also correlates with proportion of patients having side effects


effectiveness of medication Effect size also correlates with proportion of patients having side effects

Raters' expectations and patients' suggestibility could entirely explain the small effect size


effectiveness of medication Doctors do not generally tell patients about small effect size and substantial non‑response rate of antidepressants for fear of undermining effectiveness


effectiveness of medication Doctors do not generally tell patients about small effect size and substantial non‑response rate of antidepressants for fear of undermining effectiveness

Questioning the effectiveness of antidepressants is legitimate

Conclusion

Perhaps not that surprising that doctors were slow to recognise antidepressant discontinuation reactions, as focus too much on short-term fix, not psychologically minded and too quick to peddle medication

Conclusion

Perhaps not that surprising that doctors were slow to recognise antidepressant discontinuation reactions, as focus too much on short-term fix, not psychologically minded and too quick to peddle medication

Not all doctors fit this stereotype

Conclusion

Psychiatry can be practised without the justification of postulating brain pathology as the basis for mental illness

Conclusion

Psychiatry can be practised without the justification of postulating brain pathology as the basis for mental illness

Mental disorders must show through the brain but not always in the brain

Conclusion

"Psychiatry is naked," the child said.Psychiatry could not admit to that. It thought it better to continue the procession under the illusion that anyone who couldn't see its clothes was either stupid or incompetent

Why were doctors so slow to recognise antidepressant discontinuation problems? D B Double.

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Transcript of Why were doctors so slow to recognise antidepressant discontinuation problems? D B Double.