my first experience with opiates was when i was 15 or 16, i had a horrible panic attack and was hyperventilating and started getting pseudo-tetanus, where your muscles contract in a horribly painful way like getting a charlie horse in every muscle in your body at the same time...
the nurse came in with a tray with two needles and said to me "slow down your breathing and we'll give you a shot of valium to relax your muscles and a shot of morphine for the pain.
i heard that and shut my mouth and held my breath longer than i've ever held my breath for in my life haha, and my arm slowly exteneded out and wasn't curled up and constricted and stuck like that so they could get the needle in the crook of my arm/elbow. i got a 10mg shot of valium which was heavenly was my first benzo experience too now that i think about it, and IV was great, nice calming rush and relaxed all my muscles and then came the 10mg morphine shot. when the plunger went down and that M hit my brain the world turned bright and sunny and everyone was happy and had a smile of their face and i lay there with a huge grin on my face orgasming from the experience. it was absolutely wonderful. valium + morphine/heroin is the best. when i was using H daily (sniffing/smoking/shooting) i was Rx'd valium and the valium was just essential with H, not as much so with oxy as it is with H or M.