migraine
"I get a couple of migraines a month.  Not sure if they are aggravated by hormones, stress or sinus pressure, probably a combination.  Regardless I always have throbbing pain on one side of my head along with tight muscles through the neck and shoulder.   Cyclobenzoprine is all that works.  About 30 min after taking it I can feel the tension in my head and eyes lift.  What a life saver after years of pain.  I always back it up with an ibuprofen too.  The ibuprofen alone barely touches it."