Viagra works for John but he has to take it 2-3 hours before sex - seems it works rather quicker for ChrisJ
One of the tricks is not to panic when it doesn't work straight away - panic is counter-productive to these meds as you have to be 'up for it' .... they don't work if you are tense or not really in the mood.
Men with ED as a result of prostate cancer or PCa treatment are entitled to 4 tablets per month although some GPs are a little more generous than that, especially with younger men. If the Viagra doesn't work, you could ask to try Levitra next month :-)