cluster headaches
"Began episodic cluster headaches 15 years ago at age 49.  5 years later they became chronic.  Suffered terribly for a few years until I was prescribed verapamil 80MG tabs with dose up to 240MG 3X/day.  I continually self regulate my dosage to the minimum effective dose; increasing (up to the maximum) when clusters try to break through then slowly cutting back to whatever keeps the clusters away.  My normal maintenance dose is about 120MG to 160MG 3X/day.  When I have my dose right I get ZERO indication of headaches, not even a hint.  I have had no side effects with any dosage of verapamil daily for 9  years but wonder if occasional dizziness may be attributable to the verapamil.  Neither slow release verapamil nor Imitrex worked for me."