I have always used poppers when I have been out for the night drinking at the Clubs and then play afterwards. Never had any problems with the mix of the two, in fact, always liked the combo. Just make sure the poppers are fresh. If not, they always cause a headache, the sure sign they are getting diluted. Best you toss them, or pass them along to someone you do not like.
I have used poppers and a Viagra, in moderation, and never had an issue. Just do not keep inhaling endlessly (they both drop your blood pressure and I have seen guys pass out from both, or just the poppers).
The only other caution is mixing Gee and alcohol. Again, may make you nauseous or pass out (if on your back you may choke and die on your own vomit). Have done both Gee and Martinis, with a little time in-between, and have not died (Otherwise, I could not write this).
Rambling, but hope that helps.