What the Study Found (In Plain English)
Published in The Journal of urology (2003), this randomized controlled trial evaluating human clinical outcomes investigated: We assessed the effects on spermatogenesis of placebo vs 10 or 20 mg tadalafil administered daily for 6 months to healthy men and men with mild erectile dysfunction. Key clinical takeaway: Chronic daily administration of tadalafil at doses of 10 and 20 mg for 6 months had no adverse effects on spermatogenesis or on reproductive hormones in men older than 45 years.
Dr. Lin (AI Evidence Lead): Statistical Endpoints & Numbers
Primary Endpoint & Quantitative Summary (The Journal of urology, 2003-09-15; Randomized Controlled Trial; Rigor 88/100): Chronic daily administration of tadalafil at doses of 10 and 20 mg for 6 months had no adverse effects on spermatogenesis or on reproductive hormones in men older than 45 years.
Study Limitations & Caveats Before You Act
Clinical trials evaluate specific inclusion/exclusion cohorts under protocol-controlled conditions (Randomized Controlled Trial). Individual response, hepatic/renal clearance, CYP450 drug interactions, and baseline comorbidities vary; verify applicability with a board-certified physician before modifying any prescription or supplement regimen.