Diltiazemdosage

24 HR diltiazem hydrochloride 120 MG Extended Release Oral Tablet [Cardizem]

Dosage and administration

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

Tablet should be swallowed whole and not chewed or crushed.

Hypertension: Initial adult dose is 180 to 240 mg once daily. Adjust dose according to blood pressure response to a maximum of 540 mg daily.

Angina: Initial adult dose is 180 mg once daily. Adjust dose according to response to a maximum of 360 mg.

Switching to CARDIZEM LA: Patients may be switched to the nearest equivalent total daily diltiazem dose.

2.1 Hypertension

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. 2.2 Angina 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.

2.3 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.

Text above is quoted in full from the FDA-approved drug label published by openFDA, effective November 11, 2025. Matched to this product by RxNorm code. Cross-references to other sections of the full prescribing information have been removed, since they point to a document not shown here. Nothing else is changed: no sentence is shortened, reworded or summarised.

This page reproduces regulatory text for reference. It is not medical advice, and KenyRx is not a pharmacy or a prescriber. Talk to a doctor or pharmacist about whether a medicine is right for you.

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