Well you’re not exactly telling me the mg so I mean, difficult for me to answer this question specifically really.
If your friend snorts it and says that she gets high, then just listen to her. I mean, yes snorting hydromorphone is very wasteful because the BA is so low, but it is possible to get high of course. I don’t know how sensitive you are to opioids or how small/big you are so I mean, I can’t really give you an exact amount of hydro you should do.
I would just listen to your friend really since she knows you and is experienced (I’m assuming she has no tolerance as well). After you do one line, you don’t have to wait an hour. Just wait like 7 minutes to be pretty sure you know and then do more if necessary.