Tiazac (Diltiazem Hcl) Drug Information: Description, User Reviews, Drug Side Effects, Interactions

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May 26, 2012

Tiazac

Mitral Valve Prolapse (MVP) »

What is mitral valve prolapse?

Mitral valve prolapse (also known as "click murmur syndrome" and "Barlow's syndrome") is the most common heart valve abnormality, affecting five to ten percent of the world population. A normal mitral valve consists of two thin leaflets, located between the left atrium and the left ventricle of the heart. Mitral valve leaflets, shaped like parachutes, are attached to the inner wall of the left ventricle by a series of strings called "chordae." When the ventricles contract, the mitral valve leaflets close snugly and prevent the backflow of blood from the left ventricle into the left atrium. When the ventricles relax, the valves open to allow oxygenated blood from the lungs to fill the left ventricle.

In patients with mitral valve prolapse, the mitral apparatus (valve leaflets and chordae) becomes affected by a process called myxomatous degeneration. In myxomatous degeneration, the structural protein collagen forms abnormally and caus...

Read the Mitral Valve Prolapse (MVP) article »

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Tiazac

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Tiazac®
(diltiazem hydrochloride) Extended-Release Capsules

DRUG DESCRIPTION

Tiazac® (diltiazem hydrochloride) is a calcium ion cellular influx inhibitor (slow channel blocker). Chemically, diltiazem hydrochloride is 1,5-Benzothiazepin-4(5H)-one, 3-(acetyloxy)-5-[2(dimethylamino)ethyl]-2, 3-dihydro-2-(4-methoxyphenyl)-, monohydrochloride, (+)-cis-. The chemical structure is:

Tiazac®
(diltiazem hydrochloride) Structural Formula Illustration

Diltiazem hydrochloride is a white to off-white crystalline powder with a bitter taste. It is soluble in water, methanol and chloroform and has a molecular weight of 450.98. Tiazac capsules contain diltiazem hydrochloride in extended-release beads at doses of 120, 180, 240, 300, 360 and 420 mg.

Tiazac (diltiazem hcl) also contains: black iron oxide, D&C Red No. 28, ethyl acrylate and methyl methacrylate copolymer dispersion, FD&C Blue No. 1, FD&C Green No. 3, FD&C Red No. 40, gelatin, hypromellose, magnesium stearate, microcrystalline cellulose, polysorbate, povidone, simethicone, sucrose stearate, talc, and titanium Dioxide.

For oral administration.

What are the possible side effects of diltiazem?

Get emergency medical help if you have any of these signs of an allergic reaction: hives; difficulty breathing; swelling of your face, lips, tongue, or throat.

Call your doctor at once if you have any of these serious side effects:

fast or slow heartbeats;
feeling light-headed, fainting;
fever, sore throat, and headache with a severe blistering, peeling, and red skin rash;
feeling short of breath, even with mild exertion;
swelling, rapid weight gain; or
nausea, stomach pain, low...

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What are the precautions when taking diltiazem hcl (Tiazac)?

Before taking diltiazem, tell your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

This medication should not be used if you have certain medical conditions. Before using this medicine, consult your doctor or pharmacist if you have: certain types of heart rhythm problems (such as sick sinus syndrome/atrioventricular block unless you have a pacemaker).

Before using this medication, tell your doctor or pharmacist your medical history, especially of: liver disease, kidney disease, heart failure.

This drug may make you dizzy. Do not drive, use machinery, or do any activity that requires...

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Last reviewed on RxList: 1/3/2011
This monograph has been modified to include the generic and brand name in many instances.