Category- Allopathy
Medicine Highlights
| Uses | 1. To treat high blood pressure 2. To treat severe chest pain. 3. To treat irregular heartbeats (arrhythmias) |
| Common Side Effects | 1. Headache 2. Dizziness 3. Constipation 4. Skin rash 5. Decreased blood pressure 6. Nausea |
| Additional Information | 1. Take medicine every day at the same time to maintain the drug well in the blood. 2. Do not stop the medicine usage suddenly. |
| Storage | 1. The medicine should be stored at room temperature. 2. Keep away from sunlight and moisture. 3. Keep away from the reach of children |
| How to Take This Medicine | Take this medication orally with a sip of water. |
Verapamil Uses
Verapamil 80 mg is an oral medicine belonging to the category of calcium channel blockers used to treat high blood pressure and chest pain
Directions for use
- Take Verapamil exactly as prescribed by your doctor, consistently at the same time each day.
- Do not stop taking Verapamil without your doctor’s approval, even if you feel better.
- If you miss a dose, take it as soon as you remember, unless it’s close to your next dose; then skip the missed one.
Verapamil side effects
More Common
- Headache
- Dizziness
- Constipation
- Skin rash
- Decreased blood pressure
- Nausea
Less common
- Lightheadedness
- Palpitations
- Oedema (accumulation of water in the tissues)
How Verapamil works
Verapamil 80 mg works by blocking the entry of calcium into the blood vessels and heart. This inhibition relaxes the vessels and lowers the strain on the heart. This makes the heartbeat more steady, lowers blood pressure, and improves blood flow. In short, it calms the heart and eases strain on the circulation.
Safety Measures and Warning
Kidney and Liver Problems
Kidney and liver patients should avoid taking verapamil because it may cause toxicity to the organs, so consult a doctor before using it.
Pregnancy
Pregnant women should only use verapamil unless prescribed by a doctor. Because its safety in pregnancy is unproven, and there are potential risks to the baby. So always consult a doctor before using it.
Breastfeeding
Breastfeeding women should only take verapamil if advised by a doctor. Although the drug passes into breast milk in very small amounts, its safety for infants is not fully established, so mothers should always consult a doctor before using it.
Verapamil Interaction with other Medicines
Avoid taking Verapamil 80 mg with the following medicines, as it may increase or decrease the desired effect, or in worse cases, it could be fatal:
Verapamil Interaction with Food Products
Verapamil is generally safe with food, and it is recommended to avoid alcohol and smoking with verapamil, as they can alter the drug’s effect and may cause severe drowsiness and sedation because of their direct action on the brain.
Storage
- The medicine should be stored at room temperature.
- Keep away from sunlight and moisture.
- Keep away from the reach of children.
Verapamil Chemical Structure
IUPAC (International Union of Pure and Applied Chemistry)/ Chemical name
2-(3,4-dimethoxyphenyl) -5-[2-(3,4-dimethoxyphenyl) ethyl-methylamino]-2-propan-2-ylpentanenitrile
Intake routine/cycle
Daily Dose
Take Verapamil exactly as your doctor recommends. The dose may change based on your condition and how well you respond. Do not take more than prescribed without consulting your doctor.
Missed Dose
If you forget to take your medicine, take the medication as soon as you remember. If it’s nearly time for your next dose, skip the missed one and continue with your regular schedule. Always consult the doctor before making any changes to your dosage.
Overdose
It is not recommended to take more than 30 mg of Verapamil per day, as it may cause severe adverse effects like extreme drowsiness, confusion, low blood pressure, unconsciousness, high fever, severe diarrhea, and heart weakness.
Verapamil Summary
Verapamil 80 mg is a calcium channel blocker that is approved for high blood pressure, chest pain (angina), and abnormal heart rhythms (arrhythmias). Its off label uses include migraine prevention and cluster headache management. It functions by blocking calcium into the blood vessels and heart. This inhibition relaxes the vessels and lowers the strain on the heart. Common side effects include constipation, dizziness, headache, low blood pressure, and swelling in the ankles. Verapamil’s effects intensify when it interacts with grapefruit juice and alcohol, resulting in severe side effects. People with severe heart failure, very low blood pressure, and certain heart conduction problems should inform the doctor before using it. Taking more than 2,000 mg in a day can cause dangerously low blood pressure, a slow heart rate, fainting, shock, or even death.
FAQ’s
What is the mechanism of action of verapamil?
Verapamil 20 mg relaxes and widens blood vessels, making blood flow easier and lowering blood pressure. It blocks three types of calcium channels L-type, T-type, and N-type that normally tighten blood vessels and make the heart work harder. By easing these signals, verapamil opens the pathways and lightens the heart’s load.
What are the uses of verapamil tablets?
Verapamil is a medicine used to treat high blood pressure and chest pain due to poor blood flow to the heart. It helps by relaxing blood vessels and improving circulation, which eases the heart’s workload.
What are the side effects of verapamil 20 mg tablets?
Common side effects of verapamil use include headaches, dizziness, swollen ankles, and sometimes tummy discomfort or skin rashes.
Reference
- Fahie S, Cassagnol M. Verapamil. [Updated 2023 Feb 6]. In: StatPearls [Internet]. Treasure Island (FL): StatPearls Publishing; 2025 Jan–. Available from.
- PubChem [Internet]. Bethesda (MD): National Library of Medicine (US), National Center for Biotechnology Information; 2004-. PubChem Compound Summary for CID 2520, Verapamil; [cited 2026 Feb. 10]. Available from.
- Mayo Clinic. Verapamil (oral route) – Side effects & dosage [Internet]. Rochester (MN): Mayo Foundation for Medical Education and Research; updated 2026 Feb 1 [cited 2026 Feb 10]. Available from.
- Drugs.com. Verapamil: Uses, Dosage, Side Effects [Internet]. Drugs.com; updated 2025 Dec 15 [cited 2026 Feb 10]. Available from.
Authors
Siva Krishna Adithya Bhumireddy completed a Bachelor of Pharmacy from GIET School of Pharmacy, affiliated with Andhra University, and from his 3rd year of graduation, he was working as a freelance medical and publication writer. Having expertise in systematic reviews and clinical research. With his keen interest and skills in research and documentation practices, he also reviewed more than 150 manuscripts from international journals like Elsevier, Springer Nature, and Sage Journals, and all the manuscripts were indexed and appeared in PubMed, Scopus, and Web of Science databases, and he received honorary recognition letters and certificates from all of them. Siva Krishna Adithya also published a few systematic, narrative reviews and a few chapters of international expertise.