cluster headaches
"I had regular clusters every August throughout my 20s and 30s. They went away when I had sinus surgery at age 40. Then they restarted in early May this year, at the age of 63. Verapamil 240 milligram has been completely effective in stopping them. (Unfortunately, they may have turned chronic -- whenever I experimentally quit the Verapamil, they resume.) I have one major side-effect: a daily two- or three-hour bout of diarrhea. Imodium and similar meds leave me with a painful case of constipation followed by...diarrhea. I have adopted a low-mass, low-irritant diet, and this mitigates it somewhat, but it does not solve it. My doc has directed me to try a lower dose (120 mg.) in the hope that this will mitigate this side effect."