We’ve recently updated our pain management guideline to include Ketamine in addition to IV opioids for severe pain.
Here’s a marvellous post from the Skeptics’ Guide to Emergency Medicine that should give you a better understanding of where the evidence is, and why this is an outstandingly good idea;
Be sure to scroll all the way to the end where you’ll find a couple of ‘paper in a picture’ graphics that summarise the literature !
Good backgrounder from the ALiEM folks;
http://www.aliem.com/migraine-treatment-for-pediatric-em-patients
Infrequently encountered pre-hospital in my experience, handy to have a background and understand that this is a painful presentation;
http://emergencymedicinecases.com/emergency-management-of-sickle-cell-disease
More literature to support this as being an excellent idea;
http://www.emlitofnote.com/2014/11/ketamine-for-you-and-you-and-you-and-you.html