Common use

Calan SR (verapamil sustained release) is a trusted calcium channel blocker widely prescribed to manage high blood pressure (hypertension) and related cardiovascular conditions. When you buy Calan SR online, you receive a proven medication that works by relaxing blood vessels and reducing the workload on the heart. Verapamil sustained release is used to treat hypertension, hypertensive crisis, primary pulmonary hypertension, stable and unstable angina (chest pain), supraventricular tachycardia, sinus tachycardia, atrial tachyarrhythmia, atrial flutter, atrial arrhythmia, and other heart rhythm disorders. As a calcium channel blocker, Calan SR prevents calcium from entering smooth muscle cells of the heart and blood vessels, which leads to relaxation of the arteries, improved blood flow, and a healthier heart rate. Calan SR generic is available at competitive prices, making effective blood pressure management accessible to more patients who need reliable arrhythmia and angina treatment.



Dosage and direction

Patients diagnosed with angina (chest pain) or supraventricular tachycardia should take Calan SR three times a day as directed by their physician. Those being treated for arterial hypertension typically take verapamil sustained release twice daily. Dosage is carefully individualized based on the specific condition being treated, patient age, overall health status, and the severity of symptoms. Standard doses for adults generally range from 120 mg to 480 mg per day, divided into appropriate intervals. It is essential to swallow the sustained release tablet whole with a full glass of water — do not crush, chew, or break the tablet, as this may release the medication too quickly. Always consult your doctor before starting or adjusting your Calan SR dosage. Your physician may need to monitor your blood pressure and heart rate regularly to ensure optimal therapeutic results.



Precautions

Calan SR can influence your thinking, alertness, and reaction time. Special carefulness is necessary while driving, operating heavy machinery, or performing any activities requiring concentration and fast reflexes. Rise slowly from sitting or lying positions, as verapamil may cause dizziness or lightheadedness due to a temporary drop in blood pressure. Avoid consuming alcohol while taking this calcium channel blocker, since alcohol can intensify drowsiness and lower your blood pressure further. Consult your doctor regarding grapefruit juice consumption, as its interaction with Calan SR may lead to elevated drug levels in the blood and potentially dangerous cardiovascular effects. Inform all healthcare providers treating you that you are taking verapamil sustained release, especially before any surgical procedures or dental work.



Contraindications

Calan SR is contraindicated in patients with hypersensitivity to verapamil or any component of the formulation. Do not use this medication if you have severe arterial hypotension, are pregnant or breastfeeding, or have been diagnosed with second- or third-degree atrioventricular block, sinoatrial blockade, or sick sinus syndrome (unless a functioning pacemaker is in place). Patients with Wolff-Parkinson-White (WPW) syndrome or Lown-Ganong-Levine syndrome combined with atrial fibrillation or flutter must not take this calcium channel blocker. Additionally, conditions such as severe heart failure, cardiogenic shock, and severe left ventricular dysfunction require extreme caution. Never take Calan SR unless it has been specifically prescribed for you by a qualified physician, and always follow the prescribed dosage instructions exactly.



Possible side effects

Common side effects associated with Calan SR include constipation, dizziness, nausea, low blood pressure (hypotension), and headaches. While many patients tolerate verapamil sustained release well, more serious side effects require immediate medical attention. Contact your healthcare provider or seek emergency care if you experience chest pain, an irregular heart rhythm (arrhythmia), a noticeably slow heart rate (bradycardia), signs of heart attack or stroke, significant fluid retention or swelling — particularly if accompanied by difficulty breathing — symptoms of very low blood pressure such as severe dizziness, lightheadedness, or fainting, hallucinations or other mental health changes, or any signs of an allergic reaction including unexplained rash, hives, itching, swelling of the face or throat, wheezing, or difficulty breathing or swallowing. Report any unusual symptoms to your doctor promptly.



Drug interaction

Dangerous slowing of the heart may occur if Calan SR is taken concurrently with a beta-blocker. This calcium channel blocker is known to increase blood concentrations of digoxin, theophylline, carbamazepine, and certain muscle relaxants, so these drug levels should be monitored closely to avoid toxicity. In some patients, blood levels of lithium may be reduced when taken with verapamil. Additionally, Calan SR may interact with other antihypertensive medications, statins (such as simvastatin), certain antibiotics, antifungal agents, and HIV protease inhibitors. Always inform your doctor about all prescription medications, over-the-counter drugs, vitamins, and herbal supplements you are currently taking before starting Calan SR generic or brand-name verapamil sustained release.



Missed dose

If you missed a dose of Calan SR, take it as soon as you remember. However, if it is almost time for your next scheduled dose, skip the missed dose and continue with your regular dosing schedule. Do not take a double dose or an extra tablet to compensate for the one you missed. Maintaining a consistent dosing schedule is important for optimal blood pressure control and heart rhythm management.



Overdose

If you suspect that you have taken too much Calan SR and experience symptoms such as an unusually slow heartbeat, severe dizziness, fainting, difficulty breathing, or loss of consciousness, seek immediate emergency medical attention. Verapamil overdose can be life-threatening and requires prompt professional treatment. Call your local poison control center or emergency services right away.



Storage

Store Calan SR at room temperature between 15-30 C (59-86 F) in a light-resistant container. Keep the medication in its original packaging away from excessive moisture and heat. Store out of reach of children and pets. Do not use the medication past its expiration date.



Disclaimer

We provide only general information about medications which does not cover all directions, possible drug integrations, or precautions. Information at the site cannot be used for self-treatment and self-diagnosis. Any specific instructions for a particular patient should be agreed with your health care adviser or doctor in charge of the case. We disclaim reliability of this information and mistakes it could contain. We are not responsible for any direct, indirect, special or other indirect damage as a result of any use of the information on this site and also for consequences of self-treatment.