pain
"I have had Demerol twice via injection during ER visits and it worked very well. The first time it took 2 x 100 mg shots to knock out the severe pain caused by the neurotoxin in an Atlantic box jelly fish sting - worst pain I've ever felt! The second time it was a 75mg shot that pretty much dulled a uterus spasm I was having - felt like someone was ripping my insides out. I was given a shot of Vistaril shortly after the Demerol and it greatly enhanced the Demerol's effectiveness. "