I am a 51 year old non smoking, quit 4 years ago, male. I have no underlying medical conditions, hardly drink alcohol and consider myself relatively fit.
My problem is that I find it difficult to maintain an erection, during intercourse alls well for the first 5-10 mins then I lose my erection, this can happen a couple of times then I just lose interest. I have tried viagra but to no avail, just gives me a headache.
Any advice would be greatly appreciated