title: The role of statins in erectile dysfunction: a systematic review and meta-analysis.
abstract: To evaluate the effect of statins for erectile dysfunction (ED), a systematic review of the literature was conducted in the Cochrane Library, Embase and PubMed from the inception of each database to June 2013. Only randomized controlled trials (RCTs) comparing treatment for ED with statins were identified. Placebo RCTs with the International Index of Erectile Function (IIEF) as the outcome measure were eligible for meta-analysis. A total of seven RCTs including two statins with a total of 586 patients strictly met our criteria for systematic review and five of them qualified for the meta-analysis. A meta-analysis using a random effects model showed that statins were associated with a significant increase in IIEF-5 scores (mean difference (MD): 3.27; 95% confidential interval (CI):1.51 to 5.02; P < 0.01) and an overall improvement of lipid profiles including total cholesterol (MD: -1.08; 95% CI: -1.68 to -0.48; P < 0.01), low-density lipoprotein (LDL) cholesterol (MD: -1.43; 95% CI: -2.07 to -0.79; P < 0.01), high-density lipoprotein (HDL) cholesterol (MD: 0.24; 95% CI: 0.13 to 0.35; P < 0.01) and triglycerides (TGs) (MD: -0.55; 95% CI: -0.61 to -0.48; P < 0.01). In summary, our study revealed positive consequences of these lipid-lowering drugs on erectile function, especially for nonresponders to phosphodiesterase type 5 inhibitors (PDE5Is). However, it has been reported that statin therapy may reduce levels of testosterone and aggravate symptoms of ED. Therefore, larger, well-designed RCTs are needed to investigate the double-edged role of statins in the treatment of ED.
authors.forename: Xiang
authors.initials: X
authors.lastname: Cai
authors.forename: Ye
authors.initials: Y
authors.lastname: Tian
authors.forename: Tao
authors.initials: T
authors.lastname: Wu
authors.forename: Chen-Xi
authors.initials: CX
authors.lastname: Cao
authors.forename: Si-Yuan
authors.initials: SY
authors.lastname: Bu
authors.affiliation: Department of Urology, West China Hospital, Sichuan University, Chengdu, China.
authors.forename: Kun-Jie
authors.initials: KJ
authors.lastname: Wang
mesh_terms: D000069059:Atorvastatin; D050171:Dyslipidemias / Q000150:complications / Q000188:drug therapy / Q000503:physiopathology; D004730:Endothelium, Vascular / Q000187:drug effects / Q000503:physiopathology; D007172:Erectile Dysfunction / Q000150:complications / Q000188:drug therapy* / Q000503:physiopathology; D006538:Heptanoic Acids / Q000009:adverse effects / Q000627:therapeutic use; D006801:Humans; D019161:Hydroxymethylglutaryl-CoA Reductase Inhibitors / Q000009:adverse effects / Q000627:therapeutic use*; D008055:Lipids / Q000097:blood; D008297:Male; D011758:Pyrroles / Q000009:adverse effects / Q000627:therapeutic use; D016032:Randomized Controlled Trials as Topic; D019821:Simvastatin / Q000009:adverse effects / Q000627:therapeutic use
chemical_list: D006538:Heptanoic Acids; D019161:Hydroxymethylglutaryl-CoA Reductase Inhibitors; D008055:Lipids; D011758:Pyrroles; D000069059:Atorvastatin; D019821:Simvastatin