It opens the arteries fighting hbp, angina
, and even raynaud's. 2nd is cardizem/diltiazem which is 1/2 way between Norvasc & verapamil (isoptin). Verapamil is the 3d and good for treating irregular heart
beats, hbp, and angina as well as migraines. It likely slowed his heart &/or lowered the BP too far. Hrs.