An Efficacy and Tolerability Study for Topiramate in Obese Patients With Binge Eating Disorder.

Randomized, Double-blind Placebo Controlled Trial With Topiramate for the Treatment of Obese Patients With Binge Eating Disorder

The purpose of this study is to evaluate the effectiveness and tolerability of topiramate compared to placebo in patients with binge eating disorder receiving Cognitive Behavior Therapy (CBT)

This was a 21-week multicenter, double-blind, parallel-group, randomized controlled trial comparing the efficacy and tolerability of an add-on treatment with 200mg of topiramate versus placebo in obese patients with BED receiving group CBT. The aim of this trial is to investigate the efficacy and tolerability of adjunctive topiramate to CBT in obese patients with BED through improvement in binge eating, related psychopathology, and weight loss. The study hypothesis is that the patients using topiramate + CBT will loose more weight than patients using placebo + CBT.Tolerability will be investigated through reported adverse events and dropouts, with reasons for leaving the study being analyzed. The randomized patients will receive capsules of topiramate (25 mg, 50 mg) or placebo correspondent daily for 21 weeks

Inclusion Criteria:

• Have been meeting the diagnostic criteria for binge eating disorder (according to the Diagnostic and Statistical Manual for Mental Disorders - IV Edition criteria) with at least 2 days of binge eating per week and severity at least moderate defined by binge eating scale (score = 17)
• BMI = > 30 kg/m2 to < 46 kg/m2
• Women must be post menopausal for at least one year or surgically sterilized (hysterectomy, tubal ligation), or practice sexual abstinence or use an acceptable method of birth control (i.e. a hormonal contraceptive, spermicide plus barrier method, intrauterine device and/or vasectomized partner)

Exclusion Criteria:

• Has a history or actual diagnostic of significant psychiatric disorder (schizophrenia, psychosis, major affective disorder, suicide risk, dementia, abuses alcohol or other drugs)
• has a malignancy or a history of malignancy within the past 5 years (except basal cell carcinoma)
• evidence of uncontrolled thyroid disorders
• uncontrolled hypertension (defined as a diastolic blood pressure >110 mm/Hg and/or a systolic blood pressure >180 mm/Hg with or without medication). Hypertensive patients on medications must have been on the same dose of the same antihypertensive medication for at least two months
• history or significant renal failure or glaucoma.