Tiazac

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What is Tiazac?

Tiazac is an extended-release formulation of Tiazac, a calcium channel blocker used to treat high blood pressure, chronic stable angina, and certain heart rhythm disorders including atrial fibrillation and atrial flutter. It works by blocking calcium channels in both vascular smooth muscle and cardiac muscle cells—relaxing blood vessels to lower blood pressure and slowing the electrical conduction through the heart to control rate. Unlike dihydropyridine calcium channel blockers like amlodipine, Tiazac acts on both the heart and blood vessels, making it effective for both blood pressure and heart rate management. It's taken once daily.

Dual cardiac and vascular calcium blockade

Blocks calcium channels in both blood vessel walls and cardiac conduction tissue—relaxing peripheral blood vessels to reduce blood pressure while also slowing AV node conduction to control ventricular rate in atrial fibrillation.

Heart rate and rhythm control

By slowing electrical conduction through the AV node, Tiazac controls the rapid ventricular rate associated with atrial fibrillation and flutter—reducing palpitations, improving cardiac efficiency, and protecting the heart from rate-related damage.

Extended-release once-daily control

Tiazac's extended-release formulation delivers Tiazac consistently over 24 hours, providing smooth blood pressure and heart rate control without the variability of shorter-acting formulations and with a simplified once-daily dosing schedule.

Ongoing support, always available.

Your care doesn’t end after your visit. Message your care team anytime to discuss side effects, ask questions about your medication, or request a refill.

We stay proactive so your care stays steady — adjusting your plan as needed and keeping you informed every step of the way.

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