Ah! Smurfs over the counter now (small, blue, very helpful). I wonder what club's will say though? All have a 'no drugs' policy and how do they know what you're swallowing?
Good thing they're available without worry. Over the net you're taking a risk so proper controlled and checked is good. But you do need to be careful taking them I guess as headaches are common because of the increased blood-flow.
I've used them a few times, I still get hard, but doesn't last all night, and in the stress of play (yes it can be stressful as you worry a bit at times) it helps to keep it hard like it was when a teenager.