First, don't confuse it with an OTC migraine supplement called Migranol - they are not the same.

Migranal is not a pain medication. It is a migraine medication - a derivative of ergotomine, and while it works similarly to triptans, and has similar efficacy to Imitrex, there are different side effects, warnings, and potential drug interactions associated with it (some as long as 14 days apart):
http://www.healthcare.com/medication...asal-16497.php

You should get/have gotten a drug information sheet with the prescription; read it very carefully, and if you have any questions, consult your doctor or pharmacist.

I'm not finding the usual PubMed page on this medication; instead there is an archived drug label at:
http://dailymed.nlm.nih.gov/dailymed...archiveid=7093

The Wiki page is severely lacking, but I do find a MedLine page:
http://www.nlm.nih.gov/medlineplus/d...s/a603022.html

More can be found on the web; google: dihydroergotamine nasal spray

Doc