Tapering Diltiazem CD 120mg

Clinical Context for Discontinuation

• The American College of Cardiology and American Heart Association guidelines state that the 120mg daily dose represents the minimum effective starting dose for diltiazem extended-release formulations, with the therapeutic range extending from 120-360mg daily 1, 2

Key Considerations Before Stopping

• Unlike beta-blockers, diltiazem does not require gradual tapering to avoid rebound phenomena, as there is no significant withdrawal syndrome described in the literature 1, 2

Practical Discontinuation Approach

• The American College of Cardiology recommends simply stopping the 120mg dose without intermediate steps, and monitoring blood pressure and heart rate for 1-2 weeks after stopping to assess for return of the underlying condition 1, 2
• Monitor for return of symptoms, such as elevated blood pressure, angina, or rapid heart rate, after discontinuation rather than worrying about withdrawal effects 3

Common Pitfalls to Avoid

• The American Heart Association advises against attempting to "half" the 120mg CD capsule, as extended-release formulations cannot be split or crushed 3
• Do not confuse diltiazem discontinuation with beta-blocker discontinuation, as diltiazem does not cause rebound tachycardia or hypertension like beta-blockers do 1