I do "pill in a pocket? for afib with heart rates up to 180+. But it happens infrequently. I cannot tolerate beta blockers at all. I go to the ER for a dilitiazem drip so they can watch my blood pressure, but have also popped a pill. I suggest not getting the extended release at first but the lowest dose of the immediate release. I forget it it can be halved but I believe so.

Afib makes me need to pee really badly so cannot tell about diltiazem!