I actually tried 4mg of hydromorphone iv Wednesday, 1 week after getting 100mg of sublocade in my belly. I felt it forsure but it wasnt much of a rush but my mood definitely improved like it would feeling the whole thing. Will prob do it again with 8mgs but wont go higher than that, dont want anything bad to happen lol. I think the only chance of actually feeling anything while on subs would be to iv it. 100mgs over 5 weeks is just under 3mgs of subs a day