Publications by authors named "Nona Gamel"

Introduction: Two small, double-blind, placebo-controlled, single-dose, crossover studies found dextroamphetamine (d-amphetamine) 30 mg clearly superior to placebo in relieving symptoms of obsessive-compulsive disorder (OCD). We conducted a 5-week, double-blind, caffeine-controlled study to test the hypothesis that d-amphetamine, added after an adequate selective serotonin reuptake inhibitor (SSRI) or serotonin-norepinephrine reuptake inhibitor (SNRI) trial, would be more effective than caffeine in reducing residual OCD symptoms of moderate or greater severity.

Method: Between August 2006 and February 2008, we enrolled adults with DSM-IV OCD and a Yale-Brown Obsessive Compulsive Scale (Y-BOCS) score of >or= 20 after >or= 12 weeks of adequate treatment with an SSRI or SNRI.

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Background: Data from the fields of genetics, neuroimaging, and animal studies, along with case reports and small clinical trials, point to a role for glutamatergic dysfunction in the pathophysiology of obsessive-compulsive disorder (OCD). We report on the first open-label study to test the hypothesis that memantine, a noncompetitive glutamate antagonist, will result in a clinically meaningful reduction in OCD symptoms in adults with treatment-resistant OCD.

Methods: We recruited 15 adult subjects with Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition-defined OCD and a baseline Yale-Brown Obsessive-Compulsive Scale (Y-BOCS) of 18 or higher, who had failed to respond to treatment with a serotonin reuptake inhibitor (SRI), given at an adequate and stable dose for at least 12 weeks.

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Background: Although not as common as major depressive disorder, dysthymia is not rare and is associated with substantial impairment. Antidepressants and some psychotherapies are often effective. We explored the efficacy of the antidepressant duloxetine, a serotonin and norepinephrine reuptake inhibitor.

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Background: Kleptomania has no definitive treatment. Mixed reports of benefit from openly prescribed selective serotonin reuptake inhibitors led us to design a double-blind, placebo-controlled discontinuation trial of escitalopram.

Method: Between December 2002 and March 2005, we recruited 24 subjects aged >or=20 years with DSM-IV kleptomania of >or=1 year's duration.

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Objective: The Internet has positively altered many aspects of life. However, for a subset of users, the medium may have become a consuming problem that exhibits features of impulse control disorders recognized in the Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition.

Method: This is the first large-scale epidemiological study of problematic Internet use through a random-digit-dial telephone survey of 2,513 adults in the United States.

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Introduction: Small studies have suggested that intravenous clomipramine (CMI) may be more effective and induce faster improvement in obsessive-compulsive disorder than do orally administered serotonin reuptake inhibitors.

Objective: To test these hypotheses, we conducted a randomized, double-blind, double-dummy study of pulse-loaded intravenous versus oral CMI, followed by open-label oral CMI for 12 weeks.

Methods: We enrolled a volunteer and referred group of 34 adults with a primary diagnosis of Diagnostic and Statistical Manual of Mental Disorders, Fourth Edition obsessive-compulsive disorder of > or =1-year duration and Yale-Brown Obsessive Scale score of > or =20.

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Background: Many patients with obsessive-compulsive disorder (OCD) experience little response to standard treatment with serotonin reuptake inhibitors. Mirtazapine enhances serotonergic function by a mechanism distinct from reuptake inhibition. Because a pilot study suggested effectiveness of mirtazapine in OCD, we conducted a controlled trial.

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Background: Obsessive-compulsive disorder (OCD) often responds inadequately to serotonin reuptake inhibitors (SRIs). A case series reported substantial response to once-weekly oral morphine. We conducted a placebo-controlled, double-blind trial to investigate whether once-weekly oral morphine is effective in SRI-resistant OCD.

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BACKGROUND: Despite its considerable personal toll and its impact on the economy and the legal system, kleptomania is an understudied psychiatric disorder. METHOD: We review what is known about the epidemiology, course, and treatment of kleptomania and describe 40 patients meeting DSM-IV criteria for the disorder. RESULTS: Our data suggest a female preponderance, with an early age at onset and most often a continuous course.

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Background: Compulsive shopping disorder is increasingly recognized as a treatable impulse-control disorder. We report the first long-term, naturalistic follow-up of patients with compulsive shopping disorder, which examined the course of illness over 1 year in a cohort that had completed up to 3 months of open-label treatment with citalopram, 20 mg/day to 60 mg/day. In that trial, 17 (71%) of 24 subjects who met McElroy and colleagues' diagnostic criteria for compulsive shopping disorder were responders (Clinical Global Impressions-Improvement scale rating of much or very much improved and Yale-Brown Obsessive Compulsive Scale-Shopping Version score decrease of >/= 50%).

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