Hello, so its been 30 hours since I last iv 4mg of dilaudid. Ive been using heroin for past 6 months and past 4 months almost everyday between .1-.7 a day. Ive already hit withdrawals though not severe, and took 2mg of suboxone 6 hours ago. My question is how long before I can iv suboxone? Yes I'm aware of the dangers and whatnot, just looking for a direct answer. Thanks everyone.