Check Before Substituting Cardizem CD with Taztia XT
Substitution of long-acting calcium channel blockers (diltiazem, nifedipine, etc) will continue to cause confusion.
These heart meds come in multiple formulations and go by many different names. For example, diltiazem extended-release capsules come as Cardizem CD, Cartia XT, Taztia XT, Tiazac, etc.
But some of these are equivalent...and some are not.