Pfizer | Calan SR (Medication)
Calan SR/verapamil is indicated for the management of essential hypertension. Lowering high blood pressure helps prevent strokes, heart attacks, and kidney problems. Verapamil is called a calcium channel blocker. It works by relaxing blood vessels so blood can flow more easily. It may also lower the heart rate.
This drug may also be used to treat other heart diseases (such as hypertrophic cardiomyopathy, fast/irregular heartbeats) and to prevent chest pain (angina). ...
Tell your doctor immediately if any of these rare but very serious side effects occur:severe stomach/abdominal pain, dark urine, yellowing eyes/skin, persistent nausea/vomiting.
Tell your doctor immediately if any of these unlikely but serious side effects occur:swelling ankles/feet, shortness of breath, unusual tiredness, unexplained/sudden weight gain, severe dizziness, fainting, very slow heartbeat.
Dizziness, slow heartbeat, constipation, nausea, headache, and tiredness may occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly.
Seek immediate medical attention if you experience any symptoms of a serious allergic reaction may include:rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing. ...
Prior to taking this medicine, tell your healthcare provider if you are allergic to verapamil or if you have any other allergies. Before using this medication, tell your healthcare provider your medical history, especially of:liver disease, kidney disease, heart failure, certain muscle/nerve disorders (muscular dystrophy, myasthenia gravis).
Consult your doctor or pharmacist if you have:certain types of heart rhythm problems (such as second- or third-degree atrioventricular block, sick sinus syndrome unless you have a pacemaker, Wolff-Parkinson-White syndrome, Lown-Ganong-Levine syndrome).
Before having surgery, tell your doctor or dentist that you are taking this medication.
This drug may make you dizzy. Do not drive, use machinery, or do any activity that requires alertness until you are sure you can perform such activities safely. Limit alcoholic beverages.
During pregnancy and breastfeeding is not recommended to use this medicine without your doctor's advice. ...