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Calan (verapamil) is primarily used for heart rate control in atrial fibrillation and paroxysmal supraventricular tachycardia (SVT). It is also prescribed for chronic stable angina and hypertension.

Verapamil blocks L-type calcium channels in the heart, which slows conduction through the AV node. This reduces the number of electrical impulses that reach the ventricles, bringing the ventricular rate down to a safer range.

Common side effects include constipation, dizziness, low blood pressure, headache, and fatigue. More serious but less common effects include significant bradycardia (slow heart rate) and worsening heart failure in susceptible patients.

Verapamil has important interactions with several drugs, including digoxin, beta-blockers, and certain statins such as simvastatin. Your physician will review your full medication list before prescribing to check for dangerous combinations.

Verapamil is generally contraindicated in patients with heart failure with reduced ejection fraction because it can further depress cardiac function. Your doctor will evaluate your specific type of heart failure before considering this medication.

Dosing varies based on the formulation and individual patient factors. Immediate-release verapamil is typically started at 40 to 80 mg two to three times daily, while sustained-release forms are taken once or twice daily. Your physician will determine the appropriate starting dose and titration schedule.

Doctronic uses an AI-powered evaluation to gather detailed information about your symptoms and medical history. A licensed physician then reviews your case and, if appropriate, develops a personalized treatment plan that may include a prescription.

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