From wikipedia: Trimix is an injectable three-drug prescribed medication used to treat erectile dysfunction. The active ingredients in the mixture are usually alprostadil, papaverine, and phentolamine. The injection must be compounded by a pharmacy and administered via intracavernosal injection. (That means injected directly into your dick)
Yeah, this stuff can be brutal. I've tried it before and almost ended up having to go to the doc because it wouldn't go down after 4 hours. Luckily, the doc was available via phone, and he told me a simple trick--drink or take some [FONT=arial, sans-serif]caffeine. Downed a coke, and within 10 minutes I had relief, lol. Caffeine restricts blood vessels so you definitely don't want to have any before sex. Damn trimix stuff works, but you better be prepared for the effects.[/FONT]