.....different strokes for different folks.....aint no absolutes in clusterville....
.....for about 7 yrs verapamil was a relatively successful med for me....manageable side effects and knocked out about 70% of hits and seemed to make hits lesser in intensity. 5-6 cycles per yr so a prevent was critical. nothing less than 480 mg/dy worked (had to be IR)....would go to 1000+ in high cycle. heart function monitoring essential, and extra fiber/water to keep things moving along. a serious med for sure....for a serious condition. eventually got tired of the constant fatigue and being med reliant and dialed in OXYGEN/energy drinks, D3, w/Zomig for breakthroughs (rarely) for my ultimate management....w/chemo, age, and other life changes being additional factors i wonder about...
.....i'd do it again if i didn't know now what i didn't know then, or what's a Clusterbusters for? but, the alternative options presented here are not always possible, practical, or suitable for all...as far as i'm concerned, verapamil is an effective prevent for a good number of folk, and remains a valid tool in the ammo belt...
best
jonathan