Carvedilol (Coreg): Uses, Side Effects, Warnings, Precautions, and Patient Information

What Is Carvedilol (Coreg)?

Carvedilol is a prescription beta-blocker used to treat high blood pressure (hypertension), heart failure, and left ventricular dysfunction following a heart attack. It belongs to a class of medicines known as non-selective beta-blockers with alpha1-blocking activity. By slowing the heart rate and relaxing blood vessels, carvedilol helps the heart pump blood more efficiently while lowering blood pressure.

Carvedilol reduces the risk of hospitalization and death in many people with chronic heart failure when used as part of a comprehensive treatment plan. It is often prescribed alongside other cardiovascular medications such as ACE inhibitors, ARBs, or diuretics.

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Drug Information

• Generic Name: Carvedilol
• Common Brand Names (USA): Coreg, Coreg CR
• Common Brand Names (India): Carca, Cardivas, Carvil, Dilatrend, Carloc, Carca CR, Carvedilol Tablets IP
• Drug Class: Non-selective Beta-Blocker with Alpha1-Blocking Activity
• Prescription Required: Yes
• Controlled Substance: No
• Dosage Forms: Immediate-Release Tablets, Extended-Release Capsules
• Route of Administration: Oral
• Original Manufacturer (Coreg): GlaxoSmithKline (GSK)

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Active Ingredient

Each tablet or capsule contains:

• Carvedilol

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Available Strengths

Immediate-Release Tablets

• 3.125 mg
• 6.25 mg
• 12.5 mg
• 25 mg

Extended-Release Capsules (Coreg CR)

• 10 mg
• 20 mg
• 40 mg
• 80 mg

Availability may vary depending on the manufacturer and country.

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Brand Names

United States

• Coreg
• Coreg CR
• Generic Carvedilol

India

• Cardivas
• Carca
• Carvil
• Dilatrend
• Carloc
• Carca CR
• Carvedilol Tablets IP

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Uses of Carvedilol

Carvedilol is prescribed for:

High Blood Pressure (Hypertension)

• Lowers blood pressure
• Reduces the risk of stroke, heart attack, and kidney disease associated with uncontrolled hypertension

Heart Failure

• Chronic heart failure with reduced ejection fraction
• Improves heart function
• Reduces hospitalizations
• Lowers the risk of death related to heart failure

Left Ventricular Dysfunction After Heart Attack

• Improves survival in patients with reduced heart function following a myocardial infarction (heart attack)

Other Uses

Healthcare providers may prescribe carvedilol for certain cardiovascular conditions when clinically appropriate.

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How Carvedilol Works

Carvedilol blocks beta1, beta2, and alpha1 receptors in the body.

• Beta1 blockade slows the heart rate and decreases the force of heart contractions.
• Beta2 blockade reduces the effects of stress hormones on the cardiovascular system.
• Alpha1 blockade relaxes blood vessels, allowing blood to flow more easily.

Together, these actions lower blood pressure, reduce the heart's workload, and improve overall heart function.

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General Dosage

The appropriate dose depends on:

• Age
• Medical condition
• Blood pressure
• Heart rate
• Liver function
• Other medications
• Response to treatment

Treatment is usually started at a low dose and gradually increased by the healthcare provider to reduce the risk of dizziness or low blood pressure.

Do not stop taking carvedilol suddenly without medical advice.

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How to Take Carvedilol

• Take exactly as prescribed.
• Take carvedilol with food to reduce the risk of dizziness and sudden drops in blood pressure.
• Swallow tablets with water.
• Extended-release capsules should be swallowed whole. If needed, some formulations may be opened and sprinkled on soft food according to the product instructions.
• Take the medication at the same time each day.
• Continue taking carvedilol even if you feel well unless your healthcare provider advises otherwise.

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Common Side Effects

Common side effects may include:

• Dizziness
• Fatigue
• Low blood pressure
• Slow heart rate
• Weight gain
• Diarrhea
• High blood sugar
• Weakness
• Cold hands or feet

These side effects are generally more common when treatment is started or the dose is increased.

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Serious Side Effects

Seek immediate medical attention if you experience:

• Severe allergic reaction
• Difficulty breathing
• Swelling of the face, lips, tongue, or throat
• Fainting
• Very slow heartbeat
• Chest pain
• Worsening heart failure
• Severe shortness of breath
• Severe swelling of the legs or ankles
• Confusion
• Yellowing of the skin or eyes

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Boxed Warning

Do not stop carvedilol abruptly.

Sudden discontinuation may worsen chest pain (angina), trigger a heart attack, or cause serious heart rhythm problems, especially in patients with coronary artery disease. If treatment needs to be discontinued, the dose should generally be reduced gradually under the supervision of a healthcare provider.

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Warnings and Precautions

Tell your healthcare provider before taking carvedilol if you have:

• Asthma or chronic lung disease
• Diabetes
• Liver disease
• Kidney disease
• Heart block
• Very slow heart rate
• Peripheral vascular disease
• Thyroid disorders
• Pheochromocytoma
• Severe allergic reactions

Carvedilol may mask symptoms of low blood sugar and hyperthyroidism.

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Contraindications

Do not take carvedilol if you:

• Are allergic to carvedilol or any ingredient in the medication.
• Have severe bronchial asthma.
• Have severe liver impairment.
• Have second- or third-degree atrioventricular (AV) block without a functioning pacemaker.
• Have severe bradycardia.
• Have cardiogenic shock or decompensated heart failure requiring intravenous medications.

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Drug Interactions

Carvedilol may interact with:

• Digoxin
• Insulin and oral diabetes medications
• Calcium channel blockers (such as verapamil or diltiazem)
• Clonidine
• Amiodarone
• Certain antiarrhythmic medications
• Rifampin
• Fluoxetine
• Cimetidine
• Cyclosporine
• Other blood pressure medications

Always tell your healthcare provider about all prescription medicines, over-the-counter medicines, vitamins, and herbal supplements you are taking.

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Food and Alcohol

Take carvedilol with food.

Alcohol may increase dizziness, drowsiness, and the blood pressure-lowering effects of carvedilol. Limit or avoid alcohol unless your healthcare provider advises otherwise.

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Pregnancy

Carvedilol should be used during pregnancy only if the potential benefits outweigh the potential risks to the developing fetus. Discuss treatment options with your healthcare provider if you are pregnant or planning to become pregnant.

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Breastfeeding

It is not fully known whether carvedilol passes into human breast milk in significant amounts. Discuss the risks and benefits with your healthcare provider before breastfeeding.

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Missed Dose

If you miss a dose:

• Take it as soon as you remember.
• Skip the missed dose if it is almost time for your next scheduled dose.
• Do not take two doses at the same time.

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Overdose

Symptoms of overdose may include:

• Severe dizziness
• Very low blood pressure
• Slow heartbeat
• Difficulty breathing
• Fainting
• Seizures
• Heart failure
• Cardiac arrest (in severe cases)

Seek emergency medical attention immediately if an overdose is suspected.

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Storage

Store carvedilol:

• At room temperature between 20°C and 25°C (68°F to 77°F).
• Keep the medication in its original container.
• Protect from moisture, excessive heat, and direct sunlight.
• Keep out of reach of children and pets.

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Disclaimer

This information is intended for educational purposes only and should not replace professional medical advice, diagnosis, or treatment. Always consult a qualified healthcare provider before starting, stopping, or changing any medication. Take carvedilol exactly as prescribed and do not discontinue therapy without consulting your healthcare provider.