It's not in heroin dude. Heroin is a single chemical refined from morphine, which is found in opium. There's nothing "in" heroin, because heroin is nothing but heroin.
they didnt do anything because you were using them for pain. you have to take an excess to get fucked up also you can build a tolerance to pills but im sure 2-3 will mess you up for 4-8 hours depending on what they are but if they r hydrocodone i know they will. also id suggest swallowing two and then crushing up a third and put half in each nostril if that kinda stuf doesnt bother you. the one you snort will kick in quick and hard and then the other two will kick in a while after that. you could swallow one and then swallow the second an hour or two later but if it were me id drop em at the same time (i got alot of experience with pills though) 2 should do a good job too 3 might be pushing it oh if they r time release i dont suggest snorting