EM Curious - April 17, 2015 - By Andrew Ketterer & John Sarwark
"Let's say you're sitting in your shop when a sharply dressed fifty-somethingish gentleman shuffles in looking very uncomfortable, and also a bit embarrassed. You take your high quality history, and you reveal that he's been using a product known as "Triple Mix", which is a combination of paparavine, phentolamine, and prostaglandin--formulated for the treatment of erectile dysfunction. Specifically, it's meant to be injected into the penis (and amazingly it's FDA approved!).
You discover that he last used said product eight hours ago, and while the treatment was very effective, his erection hasn't gone away, and he's now experiencing some pretty significant pain. You examine him and discover a gloriously tumescent penis. Diagnosis? Priapism! Better get yer gloves on."
http://www.emcurious.com/blog-1/2015/4/17/priapism