| NCT00143221
| Effectiveness and Safety of Viagra in Men With ED and LUTS Due to Benign Prostatic Hyperplasia (BPH) | | treatment | 4 | completed |
| NCT00382161
| Improvement of Erectile Dysfunction by Fluvastatin in Patients With Cardiovascular Risk Factors | | treatment | 3 | withdrawn |
| NCT00422578
| Effect of Tadalafil on the Quality of Life and Sexual Life in Erectile Dysfunction | | treatment | 4 | completed |
| NCT00547352
| Study to Determine a Preference Between Sildenafil or Tadalafil Treatment for Problems Getting an Erection | | Not Available | 4 | completed |
| NCT00343200
| A Study Of The Safety and Efficacy Of Viagra In Men With Erectile Dysfunction Who Do Not Self Identify. | | treatment | 4 | completed |
| NCT00547599
| Determine If the Stress That Comes With Not Developing an Erection Affects Tadalafil Effects | | treatment | 4 | completed |
| NCT01383018
| PROPPER Prospective Registry of Outcomes With Penile Prosthesis | No drug interventions | Not Available | Not Available | completed |
| NCT00547417
| To Determine Effect and Safety of Tadalafil Taken by Men of Different Races and With Different Diseases When Needed for Erections | | treatment | 3 | completed |
| NCT00422734
| Tadalafil Taken Daily Compared to Placebo on Improvement of Getting and Maintaining an Erection and Sexual Quality of Life | | treatment | 3 | completed |
| NCT00882934
| The Management of Erectile Dysfunction With Placebo Only | No drug interventions | treatment | Not Available | completed |
| NCT00245596
| Evaluation of the Index of Sexual Life Questionnaire | | treatment | 4 | completed |
| NCT00150358
| To Yield Further Information On The Efficacy And Safety Of Viagra Among Subjects With Arterial Hypertension . | | treatment | 4 | completed |
| NCT00245258
| Study to Evaluate Viagra's Ability to Provide a Better Sexual Experience Through Quality Erections and Satisfaction | | treatment | 4 | completed |
| NCT00151463
| QEQ Treatment Responsiveness Evaluation Study | | treatment | 4 | completed |
| NCT00199563
| Use of Sildenafil (Viagra) in Diabetic Men With Erectile Dysfunction: the Impact on Blood Vessels | | other | 4 | completed |
| NCT00159848
| Effect Of A Treatment Optimization Program To Improve Satisfaction With Viagra | No drug interventions | Not Available | 4 | completed |
| NCT00654082
| A Study Evaluating the Efficacy and Safety of Sildenafil in Men With Traumatic Spinal Cord Injury and Erectile Dysfunction | | treatment | 4 | completed |
| NCT00547573
| Determine Safety and Effectiveness of Tadalafil in Asian Men When Taken as Needed for Getting and Keeping an Erection | | treatment | 3 | completed |
| NCT00301262
| Impact Of Viagra On Sexual Satisfaction Of Men With Mild Erectile Dysfunction Who Are Sexually Dissatisfied | | treatment | 4 | completed |
| NCT00498680
| Safety and Clinical Effectiveness of 2 Lower Dose Combined PDE5i's vs. Single Maximal Dose PDE5i | | treatment | 4 | unknown_status |
| NCT00547092
| Study For Which Treatment, Tadalafil or Sildenafil, is Preferred For Problems Getting or Maintaining an Erection | | treatment | 4 | completed |
| NCT00137072
| Mild To Moderate Erectile Dysfunction Study | | treatment | 4 | completed |
| NCT00906269
| Can Hyperbaric Oxygen Improve Erectile Function Following Surgery for Prostate Cancer | | treatment | 4 | unknown_status |
| NCT00547495
| Study the Safety and Effectiveness of Tadalafil in Men With Problems Getting or Maintaining an Erection When Taken Prior to Desiring an Erection | | treatment | 3 | completed |
| NCT03830164
| Pentoxifylline, Atorvastatin, and Vitamin E in Treating Patients With Erectile Dysfunction After Radiation Therapy for Prostate Cancer | | treatment | 2 | completed |
| NCT00517179
| Effect of Vardenafil on Blood Pressure in Patients With Erectile Dysfunction Who Received Concomitant Doxazosin GITS | | treatment | Not Available | completed |
| NCT00547287
| Studying the Preference of Tadalafil to Sildenafil in Men With Problems Getting an Erection Across Nations | | treatment | 3 | completed |
| NCT00547183
| Study the Safety and Effectiveness of Tadalafil in Men With Diabetes Who Have Problems Getting and Keeping an Erection | | treatment | 3 | completed |
| NCT00147628
| Assessment Of Sildenafil On Erectile Function And Intercourse Satisfaction And To Validate A New Subject Questionnaire | | treatment | 4 | completed |
| NCT00159809
| Efficacy Study Measuring The Impact Of Treatment With Viagra On The Depressive Symptoms Of Men With Erectile Dysfunction | | treatment | 4 | completed |
| NCT00141349
| Assessment of Onset, Safety & Toleration of UK-369,003 in Male Erectile Dysfunction | | treatment | 2 | completed |
| NCT00273416
| A Randomized Double Blind, Placebo Controlled Balanced 4-Way Crossover Study To Assess The Efficacy Of Single Oral Doses | | treatment | 2 | completed |
| NCT00174486
| Assessment Of Duration Of Action, Safety & Toleration Of UK369,003 and Cialis In Patients With Erectile Dysfunction | | treatment | 2 | completed |
| NCT00249730
| Titration Study to Evaluate Efficacy and Satisfaction of Viagra in Men With Erectile Function. | | treatment | 4 | completed |
| NCT00090376
| Evaluate the Effects of GPI 1485 on Erectile Function Following Bilateral Nerve-Sparing Prostatectomy | | treatment | 2 | completed |
| NCT00143260
| Study Of Men With Mild To Moderate Erectile Dysfunction To Evaluate The Efficacy Of Viagra 8 Hours Post-Dose | | treatment | 4 | completed |
| NCT00297544
| Effect of Sildenafil on Endothelial Function | | educational_counseling_training | Not Available | unknown_status |
| NCT00547508
| To Determine How Different Doses of Tadalafil Work on Getting and Keeping an Erection 26 or 36 Hours After Taking | | treatment | 3 | completed |