migraine
"I've had migraines since I was a teenager (now in my 60s) and this is the best treatment I've ever been prescribed.  My migraine starts with pins and needles in my lips, tongue and occasionally ends of my fingers, followed by flashing lights which seem to be triggered by bright light, sunshine flickering behind trees, sun on snow, etc.  If I take a Relpax within 10 minutes of symptoms the migraine doesn't progress to nausea, violent headache and loss of speech - as used to be the case.  My GP in France prescribes these for me, and 1 packet now seems to last me between 6 and 9 months.   Absolutely brilliant."