Well, verapamil is a calcium channel antagonist. I use Cardizem, in low dose for my blood pressure, it has similar actions. And I have erratic burning episodes too.

So I searched this subject-- didn't have much luck, but did find the
verapamil information, scanty as it is. My issues are worse in summer than cooler months. And only 2 toes turn color, not the whole foot.

I bet you were suffering a long time with this!

Thank you for posting... it might just be an answer for someone else who visits here!