Verapamil is a calcium channel blocker commonly used to treat high blood pressure, chest pain (angina), and certain heart rhythm problems. It relaxes blood vessels and slows the heart rate, which lowers blood pressure and reduces workload on the heart. Patients often feel fewer chest pain episodes and better blood pressure control after a few weeks, though effects on heart rhythm can be noticed sooner.
it reduces calcium entry into heart and vessel muscle cells, which lowers contractility and narrows the signal speed in the heart’s electrical system. Because of this effect, verapamil helps control fast heart rates like supraventricular tachycardia and can reduce spasms in coronary arteries. Different forms exist: immediate-release tablets, extended-release tablets, and capsules for once-daily dosing. Your doctor will pick the form that fits your condition and lifestyle.
Before you start verapamil, check your pulse and blood pressure. Common starting doses vary, but doctors often begin low and increase as needed. Don’t stop the drug suddenly—stopping abruptly can cause a rebound rise in blood pressure or worsen angina. If you miss a dose, take it when you remember unless it’s almost time for the next one; do not double up.
Watch for key side effects: low heart rate (bradycardia), dizziness, constipation, headache, and swelling in the legs. Serious but less common issues include heart block and worsening heart failure. If you are short of breath, faint, or notice very slow pulse, seek medical care. Grapefruit juice can raise verapamil levels and increase side effects, so avoid regular consumption.
Drug interactions matter. Verapamil can increase blood levels of drugs like beta blockers, digoxin, certain statins, and some anti-arrhythmics. Combining verapamil with other medicines that slow the heart may cause dangerous bradycardia. Always tell every provider and your pharmacist what you take, including supplements and over-the-counter drugs.
Pregnancy and breastfeeding call for discussion with your doctor—verapamil may be used if benefits outweigh risks, but your clinician will advise safe choices. For older adults, doctors often choose lower doses and monitor kidney and liver function.
Simple monitoring keeps you safe: check blood pressure and pulse at home, report symptoms, and attend follow-up visits for dose checks and occasional ECGs or blood tests. If you notice worsening swelling, persistent cough, or weight gain, mention it—those can signal fluid retention or heart changes.
take extended-release verapamil at the same time daily, swallow whole, avoid grapefruit, never mix with similar heart-rate slowing drugs unless guided, and carry a list of your medications. If unsure, call your healthcare team before changing anything.
Brands and cost: Verapamil is sold as Calan, Isoptin, Verelan, and Covera-HS, but generic verapamil is available and cheaper. If cost is an issue, ask your doctor about assistance programs, alternative formulations, or pharmacy discount cards. Extended-release versions often cost more but improve convenience and steady blood levels. Always check prescription labels for the formulation and dose so you don't take the wrong version.
Learn all about Calan (Verapamil)—its uses, side effects, safe usage tips, and real-world info for Australians. Stay informed for smarter health choices.
