{"nct_id":"NCT00644956","title":"A Randomized, Open-Label, Crossover, Multicenter, Single Dose Comparator Study Evaluating Onset Of Penile Rigidity In Men With Erectile Dysfunction Who Are Treated With Sildenafil And Tadalafil","status":"COMPLETED","status_verified_date":"2021-01","start_date":"2003-06","start_date_type":null,"primary_completion_date":null,"primary_completion_date_type":null,"completion_date":"2003-11","completion_date_type":"ACTUAL","phases":["PHASE4"],"tickers":["PFE"]}