Context Sexual dysfunction is a common adverse effect of antidepressants that frequently results in treatment noncompliance.Objective To assess the efficacy of sildenafil citrate in men with sexual dysfunction associated with the use of selective and nonselective serotonin reuptake inhibitor (SRI) antidepressants.Design, Setting, and Patients Prospective, parallel-group, randomized, doubleblind, placebo-controlled trial conducted between November 1, 2000, and January 1, 2001, at 3 US university medical centers among 90 male outpatients (mean [SD] age, 45 [8] years) with major depression in remission and sexual dysfunction associated with SRI antidepressant treatment.Intervention Patients were randomly assigned to take sildenafil (n=45) or placebo (n = 45) at a flexible dose starting at 50 mg and adjustable to 100 mg before sexual activity for 6 weeks.
Main Outcome MeasuresThe primary outcome measure was score on the Clinical Global Impression-Sexual Function (CGI-SF); secondary measures were scores on the International Index of Erectile Function, Arizona Sexual Experience Scale, Massachusetts General Hospital-Sexual Functioning Questionnaire, and Hamilton Rating Scale for Depression (HAM-D).Results Among the 90 randomized patients, 93% (83/89) of patients treated per protocol took at least 1 dose of study drug and 85% (76/89) completed week 6 endpoint assessments with last observation carried forward analyses. At a CGI-SF score of 2 or lower, 54.5% (24/44) of sildenafil compared with 4.4% (2/45) of placebo patients were much or very much improved (PϽ.001). Erectile function, arousal, ejaculation, orgasm, and overall satisfaction domain measures improved significantly in sildenafil compared with placebo patients. Mean depression scores remained consistent with remission (HAM-D score Յ10) in both groups for the study duration.
ConclusionIn our study, sildenafil effectively improved erectile function and other aspects of sexual function in men with sexual dysfunction associated with the use of SRI antidepressants. These improvements may allow patients to maintain adherence with effective antidepressant treatment.
In an open study, sildenafil (Viagra) was prescribed for nine women outpatients who reported sexual dysfunction induced by antidepressant medication, primarily selective serotonin reuptake inhibitors. A 50 mg dose of sildenafil was prescribed, and patients were instructed to take it approximately one hour before sexual activity. They were told to increase the dose to 100 mg on the next occasion if they experienced a partial response or a lack of response to sildenafil. The nine patients, all of whom had experienced either anorgasmia or delayed orgasm with or without associated disturbances, reported significant reversal of sexual dysfunction, usually with the first dose of 50 mg of sildenafil.
Women experience two to three times the rate of depression that men do. Selective serotonin reuptake inhibitors (SSRIs) are prescribed for many conditions other than depression, such as anxiety disorders, premenstrual dysphoric disorder, pain syndromes, impulse control disorders, and personality disorders, some of which are more common in women. Increasing awareness of sexual side effects has tempered the initial enthusiasm with which SSRIs were greeted. Men taking SSRIs report higher rates of sexual side effects than women taking them, however, women seem to experience more severe sexual dysfunction. In this article, we discuss the epidemiology of sexual dysfunction and describe treatments with sildenafil.
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