Praxis Medical Insights

Est. 2024 • Clinical Guidelines Distilled

Made possible by volunteer editors from the University of Calgary & University of Alberta

Last Updated: 10/19/2025

Efficacy of Penile Extenders

Indications and Level of Evidence

  • The European Association of Urology recommends penile extender therapy as an adjunct treatment, showing average length increases of 1 cm 1
  • Penile extender therapy combined with collagenase or other conservative treatments improves outcomes compared to monotherapy 1
  • The use of penile extenders after Peyronie's disease surgery helps prevent length loss 1

Efficacy Data

  • The European Urology guidelines indicate that penile extender therapy requires prolonged use of 2-8 hours a day, appears safe with no serious adverse events reported, and shows average length increases of 1 cm as an adjunct therapy 1

Treatment Protocol

  • The European Urology guidelines suggest that penile extender therapy works better in combination with inhibitors PDE5 (tadalafil 5 mg daily) and collagenase of Clostridium histolyticum (CCH) for curvatures 30-90 degrees 1

Comparison with Other Therapeutic Options

  • Penile extender therapy is favored over vacuum devices for improving curvature and erectile function in Peyronie's disease 1
  • Vacuum devices show initial efficacy of 90% for erectile dysfunction, but decrease to 50-64% after 2 years 1

Safety Profile

  • No serious adverse events have been reported with penile extender therapy, with only transient and mild adverse events (temporary redness, mild discomfort) 1
  • The therapy has excellent overall tolerability 1

Clinical Caveats

  • Realistic expectations are essential, with modest but clinically significant improvements (1-1.5 cm in length, 11-17 degrees in curvature) 1
  • Adherence to daily use for at least 3 months is critical for efficacy 1
  • Surgery should be considered if there is no response to conservative therapy after 3-6 months, curvature is greater than 60 degrees with complex deformities, or severe erectile dysfunction is present 1