Don't Automatically Substitute Cardizem CD with Taztia XT

It can be confusing to sort through the long-acting calcium channel blockers...Adalat CC, Cardizem CD, Taztia XT, etc.

Drug suffixes (CR, LA, XT, etc) don't offer much help...there's no standard meaning to these for dosing, substitution, etc.

Use these rules of thumb to help keep the extended-release formulations of diltiazem and nifedipine straight.

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