Verapamil
Verapamil is a non-dihydropyridine calcium-channel blocker used for selected cardiovascular conditions. Immediate- and modified-release products have different instructions. Listed uses include hypertension, angina pectoris and arrhythmia.
Isoptin SR
Hypertension, Angina Pectoris, Arrhythmia
120 · 240mg
Isoptin SR is verapamil 120mg and 240mg in a modified-release tablet for hypertension, angina and arrhythmia, blocking calcium influx across the day.
Key points
- Verapamil can slow the heart and worsen selected heart-failure or conduction problems.
- Combining it with other pulse-slowing medicines requires careful review.
- Constipation is common and can become clinically important.
Select a listed product and pack to order online. Whether it suits you depends on cardiac assessment and formulation; ask your doctor or pharmacist.
Important safety checks
Review slow pulse, conduction block, heart failure, low blood pressure, liver disease, bowel problems and all heart, statin or enzyme-interacting medicines.
When to seek urgent care
Seek urgent help for fainting, chest pain, severe breathlessness, an unusually slow or irregular heartbeat, severe abdominal swelling, facial swelling or breathing difficulty.
Further reading
What is verapamil used for?
Verapamil is a calcium channel blocker used for high blood pressure (hypertension), angina and heart rhythm problems (arrhythmia).
How does verapamil work?
Verapamil reduces the flow of calcium into the muscle cells of the heart and blood vessels. This widens the coronary and peripheral arteries and slows the heart rate.
Which products contain verapamil?
Products containing verapamil on SGMeds include Isoptin, Calan and Verampil, with more on this page. Compare their forms, strengths and pack sizes.
How long does verapamil take to work?
Verapamil typically begins to act within 1 to 2 hours, and the effect lasts about 6 to 8 hours.
What are the side effects of verapamil?
Common side effects include constipation, dizziness and headache. Some people also get a slow heartbeat or swollen ankles and feet, and heart failure is a serious effect that needs immediate medical attention.
Can verapamil be taken with other medicines?
Verapamil interacts with beta-blockers and grapefruit juice. If you take a beta-blocker or another medicine that slows the pulse, check with a doctor or pharmacist first.
What brand names is verapamil sold under?
In other countries, verapamil is also sold as Cordilox and Securon. Brand names vary between countries, so compare products by their active ingredient.
How much does verapamil cost in Singapore?
Each product on this page shows a price for each strength and pack size in Singapore dollars, converted from US dollars, so the exchange rate can change the final amount. Larger packs usually cost less per tablet.
Payment and prices →Do I need a prescription for verapamil in Singapore?
No. SGMeds does not ask for a prescription to order verapamil: we place the order with our pharmacy partner, which prepares it and arranges delivery on your behalf.
Ordering without a prescription →Where can I buy verapamil in Singapore?
You can order verapamil here on SGMeds: choose the product, strength and pack, then check out. We deliver to Singapore and Malaysia. Express shipping is tracked and takes up to 1 week, and Regular shipping takes up to 3 weeks.
How ordering works →