I have too much experience with this, I even tried to convince the doctors after one OD to let me bring home a bunch of Narcan so I wouldn't have to pay a hospital bill or waste my time coming in the next time it happened lol.
3x on DXM, lots of seizures, very out of it, unable to remember much except it was painful. One time I guess I willingly signed myself into a mental hospital I was so out of it. When I woke up the next morning, I was like oh fuck...what did I do last night to land myself in here.
4x on Heroin, all I remember was shooting up and then painfully coming to after a shot of narcan or w/e.
2x on Coke, seizures, crazy fast heart beat, extreme anxiety. My whole body went numb and I couldn't breathe. Good old IV Lorazepam would fix me up in the hospital though.
1x on Crack/PCP...very bad combo/idea. had an actual heart attack, and ended up in the hospital for 4 days. They also found a hole in my heart, but they couldn't tell if it was from that incident or just all the Crack I was smoking in general...
1x on Ecstasy kind of, at a festival I was looking for some molly, but found some g's up hoes down. I took 2 1/2and kept partying. About 30 minutes later we found some molly and we bought a gram between 3 of us. I forgot I had already popped the pills, and stuck a straw in the bag only meaning to take a small bump(BAD IDEA) Instead half the bag went up my nose, which burned like hell, and pissed my friends off for taking so much. About 20 minutes later my heart was pounding and my head was spinning. The only thing I remember is some lady working a fruit/water stand took me in and took care of me for the next 4 or 5 hours until I felt semi-good/normal again.
2x on Valium/Alcohol/Heroin, once was intentional when I was arrested in my home by undercover police...kind of funny actually. I had a script of 10mg Valiums and i had been drinking all day and had been shooting Heroin earlier in the day. When they came I told them I had not taken my medicine yet and started to freak out until they let me take it. I swallowed like 8 or 9 of those things, knowing it would feel good and would buy me time before getting locked up, because they would have to take me to the hospital when I OD'ed on them. It worked, my whole body went numb and I slowly faded out until I woke up handcuffed to a hospital bed.