<prompt> Which is true about calcium channel blockers -Verapamil causes reflex tachycardiaDiltiazam causes reflex tachycardiaNifedipine causes reflex tachycardiaNifedipine has longer t12 than felodipine  <response>: Ans. is c i.e., Nifedipine causes reflex tachycardia o DHPs nifedipine cause reflex tachycardia.o Felodipine - it differs from nifedipine in having greater vascular selectivity, large tissue distribution and longer 02. 