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Tiazac (diltiazem HCl ER) is used to manage atrial fibrillation by slowing the ventricular rate, to treat hypertension, and to reduce symptoms of chronic stable angina. It belongs to the calcium channel blocker drug class.

Tiazac blocks L-type calcium channels in cardiac and vascular smooth muscle. In the heart, this slows conduction through the AV node, reducing ventricular rate in atrial fibrillation. In blood vessels, it causes relaxation of arterial walls, lowering blood pressure.

Tiazac is an extended-release capsule taken once daily, with or without food. The capsules should be swallowed whole or may be opened and the beads sprinkled on applesauce, but should never be chewed or crushed.

Common side effects include dizziness, headache, flushing, swelling of the ankles or feet (peripheral edema), slow heart rate (bradycardia), and fatigue. Tell your doctor right away if you develop an unusually slow pulse or signs of heart failure.

Yes. Tiazac can interact with beta-blockers, digoxin, statins (especially simvastatin), cyclosporine, and certain antibiotics or antifungals that affect liver enzymes. Always provide your physician with a complete medication list before starting Tiazac.

Tiazac is not appropriate for patients with severe left ventricular dysfunction, second- or third-degree AV block without a functioning pacemaker, sick sinus syndrome, or known hypersensitivity to diltiazem. Your physician will screen for these contraindications.

Doctronic uses an AI-guided evaluation to gather your symptoms, medical history, and medication list. A licensed physician then reviews your information, makes a clinical determination, and provides a personalized treatment plan including a prescription if appropriate.

Yes. Doctronic connects you with licensed physicians who are board-certified and practicing in your state. All visits are doctor-reviewed and audited, and the platform is fully HIPAA-compliant to protect your health information.