Propranolol ER 80mg capsule is a widely prescribed medication in the field of cardiology. It's a beta-blocker that helps to reduce blood pressure, heart rate, and stress on the heart. This article will delve into the various aspects of this medication, including its uses, side effects, interactions, and precautions.

Uses of Propranolol ER 80mg Capsule

Propranolol ER 80mg capsule is primarily used to treat high blood pressure, a condition that affects millions of people worldwide. By lowering blood pressure, it helps to prevent strokes, heart attacks, and kidney problems.

Additionally, this medication is used to prevent chest pain (angina), reduce the risk of more heart problems after a heart attack (myocardial infarction), and to reduce migraine headaches. It works by blocking the action of certain natural chemicals in your body, such as epinephrine, on the heart and blood vessels.

Side Effects of Propranolol ER 80mg Capsule

Like any medication, Propranolol ER 80mg capsule can cause side effects. Some common side effects include tiredness, slow heart rate, and sleep disturbances. Most people using this medication do not experience serious side effects.

However, if you experience symptoms of a serious allergic reaction, such as rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, or trouble breathing, it's crucial to seek medical help immediately. Always remember that your doctor has prescribed this medication because he or she has judged that the benefit to you is greater than the risk of side effects.

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Interactions of Propranolol ER 80mg Capsule

Drug interactions can change how your medications work or increase your risk for serious side effects. Some products that may interact with Propranolol ER 80mg capsule include alpha blockers (such as prazosin), calcium channel blockers (such as diltiazem, verapamil), and MAO inhibitors (Isocarboxazid, linezolid, methylene blue, moclobemide, phenelzine, procarbazine, rasagiline, safinamide, selegiline, tranylcypromine).

It's important to keep a list of all the products you use (including prescription/nonprescription drugs and herbal products) and share it with your doctor and pharmacist. Do not start, stop, or change the dosage of any medicines without your doctor's approval.

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Precautions with Propranolol ER 80mg Capsule

Before taking Propranolol ER 80mg capsule, inform your doctor or pharmacist if you are allergic to it; or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems.

Also, before using this medication, tell your doctor or pharmacist your medical history, especially of: certain types of heart rhythm problems (such as slow heartbeat, second- or third-degree atrioventricular block), breathing problems (such as asthma, chronic bronchitis, emphysema), liver disease, serious allergic reactions, including those needing treatment with epinephrine, blood circulation problems (such as Raynaud's disease, peripheral vascular disease), mental/mood disorders (such as depression), a certain muscle disease (myasthenia gravis).

Propranolol ER 80mg capsule may make you dizzy. Alcohol or marijuana (cannabis) can make you more dizzy. Do not drive, use machinery, or do anything that needs alertness until you can do it safely. Limit alcoholic beverages. Talk to your doctor if you are using marijuana (cannabis).


Propranolol ER 80mg capsule is a widely used medication with a range of uses from treating high blood pressure to preventing migraines. However, like all medicines, it comes with potential side effects and interactions. It's crucial to discuss all your medical history and current medications with your doctor before starting this medication.

Remember, your doctor has prescribed Propranolol ER 80mg capsule because they believe the benefits outweigh the risks. Always follow your doctor's instructions and consult them if you experience any side effects or have any concerns about your medication.

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