Have a question not regarding me but a friend is in dire straights atm and ive been trying to help him....seriously this isnt swimming its genuinely a friend.....when someone smokes H how long before an OD sets in? What wud i need to look for and what shud i do if it happens? I dont have narcan on hand so juat 911 and cpr? But after each toke how long until he is safe? Ill watch like a hawk until hes safe thats why i need to know how long i gota wait until hes good? Sorry but promise this isnt a swim question.....i dont even get the urge to use when i see him do it although i will cut him out of my life within the week if he doesnt get his shit together.... absolute nightmare ..... need to work on myself and forget other ppls shit