(Cardizem – brand is NP) diltiazem ext-release (Cardizem CD, Cardizem LA, Dilacor XR, Tiazac – brands are NP) felodipine ext-release nifedipine ext-release (Adalat CC, Procardia XL – brands are NP) verapamil ext-release (Calan SR, Isoptin SR, Verelan, Verelan PM - brands are NP)...