Sildenafil adjunctive therapy to risperidone in the treatment of the negative symptoms of schizophrenia: a double-blind randomized placebo-controlled trial

The Positive and Negative Syndrome Scale (PANSS) for Schizophrenia

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Adjunctive Therapy, Psychiatry, Psychotic Disorder +10

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Stephen M. Erhart, S.R. Marder, William T. Carpenter · Schizophrenia Bulletin · 2006 · 188 citations · Full text

Neuropsychology, Psychotropic Medication, Neuropsychiatry +18

Correlation between testosterone, gonadotropins and prolactin and severity of negative symptoms in male patients with chronic schizophrenia

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Andrology, Psychiatry, Psychotic Disorder +11

Sildenafil in the Treatment of Antipsychotic-Induced Erectile Dysfunction: A Randomized, Double-Blind, Placebo-Controlled, Flexible-Dose, Two-Way Crossover Trial

Rajesh Gopalakrishnan, K Jacob, Anju Kuruvilla et al. · American Journal of Psychiatry · 2006 · 96 citations