migraine
"Tried Imitrex and Relpax first, but had bad heart-squeezing and neck-squeezing side effects.  Tried Maxalt and did not have that problem.  It usually takes away the migraines, but can take 1-2 hours to get relief.  I'm also very fatigued after the pain goes away, which makes daytime onset of migraines a hassle.  Also for the 1-2 hours I am waiting for it to work, the pain actually intensifies until suddenly it lets go and the blood vessels in my head feel cold.  Strange, but true."