Ejaculation is a reflex phenomenon. One cannot will it to happen. Also when a man has ejaculation the signal for that is sent from the brain via the spinal cord. There are many drugs which cause ejaculation delay and fludac is one of them. Perhaps the drug is long acting and hence you may need longer time off it to regain the ejaculation. Meanwhile don't have sex for few days. This will make your body want sex and when you have sex after an abstinence, have a very exotic fantasy to masturbate or be with your partner. Try not to ejaculate. try to heighten pleasure by doing things to make penis harder. like massaging balls, armpit licking, groin licking etc whatever that makes you very excited. This can bring about the ejaculation. Try. Dont make a habit of using megalis for every act of sex. The action of megalis lasts for a good 2-3 days. Hence try to have sex without megalis on the following day of taking it. If you feel the erections by megalis arent hard, ask your doctor to switch to sildenafil