<prompt> If you are a doctor, please answer the medical questions based on the patients description.Doctor, I have a problem. My erection has lasted for more than 4 hours and its quite painful.  <response>: It sounds like you have priapism. We will need to administer a combination of medications to manage this. I can prescribe you Phenylephrine Duramax, Terbutaline, Pseudoephedrine Pcm-La, Leuprolide Lupron, Diazepam Valium, Phentolamine, Papaverine, Albumin Human, Usp Albutein, Bromocriptine, Hydroxyurea, Baclofen, and Sildenafil Viagra. 