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Cardizem LA Dosage

Generic name: Diltiazem Hydrochloride 120mg
Dosage form: tablet, extended release
Drug classes: Calcium channel blocking agents, Group IV antiarrhythmics

Medically reviewed by Last updated on Apr 24, 2023.

Take CARDIZEM LA once a day at approximately the same time. Do not chew or crush the tablet.


Initiate dosing at 180 to 240 mg once daily, although some patients may respond to lower doses. Titrate according to blood pressure to a maximum of 540 mg daily. Maximum antihypertensive effect is usually observed by 14 days of chronic therapy.


Initiate dosing at 180 mg once daily and increase dose at intervals of 7 to 14 days if adequate response is not obtained, to a maximum of 360 mg.

Switching to CARDIZEM LA Tablets

Patients controlled on diltiazem alone or in combination with other medications may be switched to CARDIZEM LA once a day at the nearest equivalent total daily dose. Higher doses of CARDIZEM LA may be needed in some patients based on clinical response.

Further information

Always consult your healthcare provider to ensure the information displayed on this page applies to your personal circumstances.