Metoprolol
"I had a neck fusion 10 years ago from an auto accident.  Then hit my head on a cabinet and crushed my surgical site and herniated 2 more discs.  I'm much better now 10 years later but with a high stress day, I get muscle spasms in my neck and horrible headaches.  I've been sick for 3 days with neck pain and headache, with nausea.  I've been on pain pill, Tramadol, muscle relaxer, Skelaxin, and Zofran for nausea, and ice packs and heat to my neck.  Nothing working!   I took my first Metoprolol 50mg this morning and my headache is gone!  No side effects from the metoprolol.   I consider it my miracle drug.

I'm a cardiac nurse and hand out metoprolol all day for cardiac conditions.  Who knew it was for migraine/headaches?!."