A controlled trial of dothiepin and placebo in treating benzodiazepine withdrawal symptoms.
BACKGROUND
The possibility that treatment with tricyclic antidepressants, in the form of dothiepin, might attenuate benzodiazepine withdrawal symptoms was investigated in a double-blind trial.


METHODS
Eighty-seven non-depressed psychiatric out-patients with putative normal dose benzodiazepine dependence had their benzodiazepines reduced in stepwise amounts of 20% of the original dose for eight weeks. The patients were randomised to receive dothiepin (with dosage increasing to 150 mg/day) or placebo as an aid to withdrawal before benzodiazepine reduction and these drugs were taken for four further weeks before being stopped.


RESULTS
Fewer patients entered and completed the study than expected and a Type II error was possible in the results. Although there was some evidence of withdrawal symptoms being less marked in those patients allocated to dothiepin this was independent of any antidepressant effect as depression scores were lower in the placebo group in the early phase of withdrawal (P < 0.01). Of those completing the study, greater satisfaction (P = 0.03) was recorded by those who had received dothiepin; no other differences reached statistical significance.


CONCLUSIONS
Dothiepin (and by implication other tricyclic antidepressants) might have some value in reducing benzodiazepine withdrawal symptoms but does not aid drug withdrawal.
Tyrer
P
P
St Charles Hospital, London.
Ferguson
B
B
Hallström
C
C
Michie
M
M
Tyrer
S
S
Cooper
S
S
Caplan
R
R
Barczak
P
P
D000553:Ambulatory Care; D014151:Anti-Anxiety Agents / Q000009:adverse effects*; D000929:Antidepressive Agents, Tricyclic / Q000627:therapeutic use*; D001569:Benzodiazepines; D004305:Dose-Response Relationship, Drug; D004308:Dothiepin / Q000627:therapeutic use*; D004311:Double-Blind Method; D004334:Drug Administration Schedule; D006801:Humans; D009460:Neurologic Examination / Q000187:drug effects; D017060:Patient Satisfaction; D013375:Substance Withdrawal Syndrome / Q000188:drug therapy*; D016896:Treatment Outcome
D014151:Anti-Anxiety Agents; D000929:Antidepressive Agents, Tricyclic; D001569:Benzodiazepines; D004308:Dothiepin