Testosterone and ?

Hello I have been taking testosterone (Cypionate) injections 1 or 2 ml every three weeks, I also have high blood pressure and am on a pain reliever (oxcodone). I am now having difficulties during I do not have any problem gaining a it is keeping the till ejaculation as it is lost after a few minutes into a session. Is there any advice and action someone can recommend that has had the same problem or not so I can have a normal life.