No sir.

No not every time. You can take occasionally. But only after advice from a local doctor after undergoing a thorough physical check up including ecg. It has certain side effects and you need to be physically fit. Also even if you take that you will anyway have to do certain lifestyle modifications and exercises. For starters, please google for kegels exercises and masters and johnson squeeze technique and masters and johnson stop and start technique and do it regularly. It will help with erection problems and will help you last longer. You can consult me or any other psychiatrist for further details.