Diazepam and halazepam in anxiety: some prognostic indicators

Area of Science:

• Psychiatry
• Clinical Psychology
• Pharmacology

Background:

• Anxiety disorders are common and require effective pharmacotherapy.
• Diazepam and halazepam are benzodiazepines used for anxiety treatment.
• Predictors of treatment response in anxious outpatients require further elucidation.

Purpose of the Study:

• To identify predictors of treatment outcome in anxious outpatients receiving diazepam or halazepam.
• To compare the efficacy and differential effects of diazepam and halazepam in anxious outpatients.

Main Methods:

• A multiple step-search regression procedure was used.
• Data were collected from 37 diazepam-treated and 42 halazepam-treated anxious outpatients.
• Patient characteristics, treatment history, and clinical outcomes were analyzed.

Main Results:

• Adequate family adjustment, precipitating stress, and prior positive psychotropic response predicted good outcomes.
• Patients with high initial anxiety and low interpersonal problems showed the most improvement with both drugs.
• Halazepam performed poorly in less anxious patients and those with a good doctor prognosis, possibly due to its high dosage and sedating effects.
• Diazepam (20 mg/d) showed more consistent anti-anxiety effects than halazepam (160 mg/d).

Conclusions:

• Treatment success in anxious outpatients is influenced by psychosocial factors and prior treatment history.
• Diazepam (20 mg/d) appears more consistently effective for general anxiety treatment compared to halazepam (160 mg/d) at the dosages studied.
• Halazepam's higher dosage may be necessary for severely anxious patients, suggesting a dose-related effect.