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  • Title: Oral scopolamine augmentation in moderate to severe major depressive disorder: a randomized, double-blind, placebo-controlled study.
    Author: Khajavi D, Farokhnia M, Modabbernia A, Ashrafi M, Abbasi SH, Tabrizi M, Akhondzadeh S.
    Journal: J Clin Psychiatry; 2012 Nov; 73(11):1428-33. PubMed ID: 23146150.
    Abstract:
    OBJECTIVE: To evaluate the antidepressant effect of oral scopolamine as an adjunct to citalopram. METHOD: In this randomized double-blind placebo-controlled study, patients were assessed in the outpatient clinics of 2 large hospitals from November 2011 to January 2012. Forty patients (18-55 years) with major depressive disorder (DSM-IV-TR criteria) and 17-Item Hamilton Depression Rating Scale (HDRS) score ≥ 22 were randomly assigned to scopolamine hydrobromide (1 mg/d) (n = 20) or placebo (n = 20) in addition to citalopram for 6 weeks. HDRS score was measured at baseline and days 4, 7, 14, 28, and 42. The primary outcome measure was HDRS score change from baseline to week 6 in the scopolamine group versus the placebo group. Response was defined as ≥ 50% decrease in HDRS score; remission, as HDRS score ≤ 7. RESULTS: Augmentation with scopolamine was significantly more effective than placebo (F(1,38) = 5.831, P = .021). Patients receiving scopolamine showed higher rates of response (65%, 13/20 at week 4) and remission (65%, 13/20 at week 6) than the placebo group (30%, 6/20 and 20%, 4/20, respectively; P = .027, P = .004, respectively). Patients in the scopolamine group showed higher rates of dry mouth, blurred vision, and dizziness than the placebo group. CONCLUSIONS: Oral scopolamine is a safe and effective adjunct for treatment of patients with moderate to severe major depressive disorder. TRIAL REGISTRATION: Iranian Registry of Clinical Trials identifier: IRCT201201181556N31.
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