dear doc,i am gopi,33 yrs ,ht 5ft 6 inches ,wt 75 kg, i am also facing a problem of premature ejaculation and not able to sustain the erection for more than 2-3 minutes,which is causing me and my wife considerable concern and we r also not blessed with a child even after 5 yrs of our marriage.My primary observation finds the above mentioned conditions. i am a smoker and an occasional drinker. please suggest some treatments and prescribe some medicines for the same. loooking forward to your valuable advice and suggestions. regards, gopi