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Medical Disclaimer: This information is for educational purposes only and is not a substitute for professional medical advice.
Brand Name
Carvedilol Phosphate
Generic Name
Carvedilol Phosphate
Active Ingredient
CarvedilolCategory
alpha-Adrenergic Blocker [EPC]
Variants
29
References used for this content
This page is for informational purposes only and does not replace medical advice. Before using any prescription or over-the-counter medication for Carvedilol Phosphate, you must consult a qualified healthcare professional.
| 80 mg/1 | CAPSULE, EXTENDED RELEASE | ORAL | 16714-230 |
| 20 mg/1 | CAPSULE, EXTENDED RELEASE | ORAL | 0115-1249 |
| 80 mg/1 | CAPSULE, EXTENDED RELEASE | ORAL | 57664-666 |
| 10 mg/1 | CAPSULE, EXTENDED RELEASE | ORAL | 67046-1551 |
| 10 mg/1 | CAPSULE, EXTENDED RELEASE | ORAL | 69238-2577 |
| 20 mg/1 | CAPSULE, EXTENDED RELEASE | ORAL | 71335-9707 |
| 40 mg/1 | CAPSULE, EXTENDED RELEASE | ORAL | 0115-1250 |
| 40 mg/1 | CAPSULE, EXTENDED RELEASE | ORAL | 42291-481 |
| 80 mg/1 | CAPSULE, EXTENDED RELEASE | ORAL | 42291-482 |
+ 17 more variants
Detailed information about Carvedilol Phosphate
Carvedilol is a third-generation, non-selective beta-adrenoceptor antagonist with alpha-1 blocking activity, primarily used to manage heart failure, hypertension, and left ventricular dysfunction following a myocardial infarction.
Dosage of carvedilol must be highly individualized and closely monitored by a healthcare professional, as the 'start low and go slow' approach is vital to prevent adverse reactions.
Carvedilol is not currently FDA-approved for use in pediatric patients (under 18 years of age). While pediatric cardiologists may occasionally prescribe it off-label for children with congenital heart defects or pediatric heart failure, the safety and effectiveness have not been established in large-scale clinical trials for this population. Dosing in these rare cases is strictly weight-based and managed by specialists.
No initial dosage adjustment is typically required for patients with renal (kidney) impairment, as carvedilol is primarily cleared through the liver. However, plasma levels may be slightly higher in patients with severe renal failure, necessitating careful monitoring of blood pressure and heart rate.
Carvedilol is contraindicated in patients with severe hepatic (liver) impairment. Because the drug is extensively metabolized by the liver, patients with cirrhosis or significant liver dysfunction can experience up to a 4-fold to 7-fold increase in drug levels, leading to dangerous toxicity.
Older adults may be more sensitive to the effects of carvedilol, particularly the risk of dizziness and falls due to orthostatic hypotension. Healthcare providers often start at the lowest possible dose and monitor more frequently during titration.
If you miss a dose, take it as soon as you remember. However, if it is almost time for your next scheduled dose, skip the missed dose and resume your regular schedule. Never double the dose to catch up, as this can lead to severe bradycardia (slow heart rate) or hypotension.
Signs of a carvedilol overdose include extreme hypotension (low blood pressure), severe bradycardia, cardiogenic shock, cardiac arrest, and respiratory problems such as bronchospasm. In some cases, seizures or vomiting may occur.
Emergency Measures: If an overdose is suspected, call 911 or your local emergency services immediately. Treatment in a hospital setting may involve intravenous fluids, glucagon, or vasopressors (medications to raise blood pressure) to support heart function.
> Important: Follow your healthcare provider's dosing instructions exactly. Do not adjust your dose or stop taking this medication without medical guidance, as abrupt discontinuation can lead to serious heart complications.
Because carvedilol affects the cardiovascular and nervous systems, side effects are relatively common, especially during the initial titration phase when the body is adjusting to the medication.
Carvedilol is a high-alert medication that requires careful management. Patients must be aware that while it is highly effective for heart health, it can interact with various underlying conditions. It is essential to maintain all follow-up appointments so your doctor can monitor your heart's response and adjust the dose safely.
According to the FDA-approved labeling, patients taking carvedilol (especially those with known coronary artery disease) must not suddenly stop taking the medication. Abruptly stopping can cause severe chest pain, heart attack, or dangerous heart rhythms. Your healthcare provider will provide a tapering schedule to safely reduce the dose over 7 to 14 days if the medication needs to be stopped.
Certain medications should never be combined with carvedilol due to the risk of life-threatening complications:
Carvedilol must NEVER be used in patients with the following conditions, as the risks far outweigh any potential benefits:
Carvedilol is classified as Pregnancy Category C. There are no adequate and well-controlled studies in pregnant women. Animal studies have shown some evidence of increased post-implantation loss and delays in physical development at high doses.
Trimester-Specific Risks:
Studies in animals indicate that carvedilol and its metabolites are excreted in breast milk. It is not known if it is excreted in human milk. Because of the potential for serious adverse reactions in nursing infants (such as bradycardia), a decision should be made whether to discontinue nursing or discontinue the drug, taking into account the importance of the drug to the mother.
Carvedilol is a racemic mixture in which the (S) enantiomer exhibits non-selective beta-adrenoceptor blocking activity (Beta-1 and Beta-2), while both the (R) and (S) enantiomers exhibit alpha-1 adrenoceptor blocking activity.
Common questions about Carvedilol Phosphate
Carvedilol is primarily used to treat chronic heart failure, high blood pressure (hypertension), and to improve survival after a heart attack in patients with a weakened left ventricle. By blocking specific receptors in the heart and blood vessels, it helps the heart beat more slowly and with less force while widening the blood vessels. This dual action reduces the overall workload on the heart muscle and helps prevent further damage. It is often prescribed as part of a comprehensive treatment plan that includes other medications like ACE inhibitors and diuretics. Your doctor may also use it to reduce the risk of hospitalization related to heart conditions.
The most common side effects include dizziness, fatigue, a slow heart rate (bradycardia), and weight gain. Many patients also report feeling lightheaded when standing up quickly, a condition known as orthostatic hypotension, which is why taking the drug with food is so important. Some people may also experience diarrhea, dry eyes (especially bothersome for contact lens wearers), or slightly elevated blood sugar levels. Most of these side effects are mild and occur more frequently during the first few weeks of treatment or when the dose is being increased. If these symptoms become severe or persistent, you should contact your healthcare provider for a dosage evaluation.
It is generally advised to avoid or strictly limit alcohol consumption while taking carvedilol. Alcohol can significantly increase the blood-pressure-lowering effects of the medication, which may lead to dangerous levels of dizziness, lightheadedness, or fainting. Furthermore, for those taking the extended-release (ER) version of carvedilol, alcohol can interfere with the capsule's coating, causing the entire dose to be released into the body at once. This 'dose dumping' can lead to an accidental overdose and severe side effects. Always discuss your alcohol intake habits with your doctor before starting this medication.
Carvedilol is classified as a Category C medication, meaning its safety during pregnancy has not been fully established in humans. Animal studies have suggested potential risks to the fetus, and beta-blockers, in general, can cause complications like slow heart rate and low blood sugar in a newborn if taken late in pregnancy. It is typically only used during pregnancy if the potential benefit to the mother's heart health outweighs the potential risks to the baby. If you are pregnant or planning to become pregnant, it is vital to discuss alternative treatments or a close monitoring plan with your cardiologist and obstetrician. Breastfeeding is also generally discouraged while taking this medication as it may pass into breast milk.
The time it takes for carvedilol to work depends on the condition being treated. For high blood pressure, you may see a reduction in your readings within a few days, but it often takes 1 to 2 weeks of consistent use to reach the full antihypertensive effect. In patients with heart failure, the benefits—such as improved exercise tolerance and reduced symptoms—may take weeks or even months to become apparent. It is important to continue taking the medication even if you do not 'feel' a difference immediately, as much of its work is happening at the cellular level to protect your heart. Never stop the medication because you feel it isn't working without consulting your doctor.
No, you should never stop taking carvedilol suddenly. Doing so can lead to a dangerous 'rebound' effect, where your blood pressure and heart rate spike, potentially causing severe chest pain (angina), a heart attack, or dangerous heart rhythms. This is particularly critical for patients with underlying coronary artery disease. If the medication needs to be discontinued, your doctor will provide a specific schedule to gradually reduce your dose over a period of one to two weeks. Always ensure you have enough refills so you do not accidentally run out of your medication.
If you miss a dose of carvedilol, take it as soon as you remember, provided it is not almost time for your next scheduled dose. If you are within a few hours of your next dose, skip the missed one and return to your regular dosing schedule. You should never take two doses at once to make up for a missed one, as this can cause your heart rate or blood pressure to drop to unsafe levels. If you miss several doses in a row, contact your healthcare provider for instructions on how to safely restart the medication. Consistency is key to the effectiveness of this treatment.
Weight gain is a documented side effect of carvedilol, occurring in about 10-12% of patients in clinical trials. This weight gain can sometimes be due to the medication's effect on metabolism, but in heart failure patients, it is often a sign of fluid retention. It is important to monitor your weight daily and report any sudden increase—such as 2 to 3 pounds in a single day—to your doctor immediately. Sudden weight gain in heart failure patients may require an adjustment of your diuretic (water pill) medication rather than a change in carvedilol. Your doctor will help determine the cause of any weight changes.
Carvedilol can interact with many other medications, including both prescription and over-the-counter drugs. It frequently interacts with other heart medications like digoxin, diltiazem, and verapamil, which can further slow the heart rate. It can also interact with certain antidepressants, diabetes medications, and even common NSAIDs like ibuprofen, which can reduce carvedilol's effectiveness. Because of these potential interactions, it is essential to provide your healthcare provider with a complete list of all supplements, vitamins, and drugs you are taking. They will monitor you closely for any signs of adverse interactions during your treatment.
Yes, carvedilol is widely available as a generic medication in both its immediate-release and extended-release forms. Generic versions are required by the FDA to have the same active ingredient, strength, dosage form, and route of administration as the brand-name versions (Coreg and Coreg CR). Choosing the generic version can significantly lower your out-of-pocket costs while providing the same clinical benefits. Most insurance plans cover the generic version of carvedilol. If you have concerns about switching between brand and generic, discuss them with your pharmacist or healthcare provider.
Other drugs with the same active ingredient (Carvedilol)
> Warning: Stop taking Carvedilol and call your doctor immediately if you experience any of these serious symptoms.
With prolonged use, carvedilol is generally well-tolerated. However, long-term monitoring is required for:
Abrupt Cessation of Therapy: The FDA has issued a warning regarding the sudden discontinuation of beta-blockers like carvedilol. If the medication is stopped abruptly, patients with coronary artery disease may experience an exacerbation of angina pectoris (chest pain), myocardial infarction (heart attack), or ventricular arrhythmias. If discontinuation is necessary, the dose should be gradually tapered over 1 to 2 weeks under strict medical supervision.
Report any unusual symptoms or persistent side effects to your healthcare provider immediately to ensure your treatment plan remains safe and effective.
To ensure safety, your healthcare provider will likely require the following:
Carvedilol can cause dizziness, drowsiness, or blurred vision, particularly when you first start taking it or when your dose is increased. Avoid driving, operating heavy machinery, or performing dangerous tasks until you know how the medication affects you. If you feel lightheaded, sit or lie down immediately.
Alcohol should be avoided or strictly limited while taking carvedilol. Alcohol can enhance the blood-pressure-lowering effects of the drug, leading to severe dizziness, fainting, or even falls. Furthermore, alcohol can interfere with the extended-release mechanism of some carvedilol formulations, causing the medication to be released too quickly into the bloodstream (a phenomenon known as 'dose dumping').
As noted in the black box warning, discontinuation must be a gradual process. If you experience side effects that make you want to stop the drug, contact your doctor first. They may be able to adjust the dose or switch you to a different medication rather than stopping treatment entirely.
> Important: Discuss all your medical conditions, including any history of lung disease, liver disease, or diabetes, with your healthcare provider before starting Carvedilol.
Carvedilol does not typically interfere with most common laboratory tests. However, it may cause slight elevations in liver function tests (ALT, AST) or blood urea nitrogen (BUN) in rare cases. Always inform the lab technician that you are taking a beta-blocker.
> Important: Tell your doctor about ALL medications, supplements, and herbal products you are taking. A complete list helps prevent dangerous interactions and ensures your treatment is as effective as possible.
In these cases, the healthcare provider will perform a careful risk-benefit analysis:
Patients who have had a severe allergic reaction to other beta-blockers (such as metoprolol, atenolol, or propranolol) should use carvedilol with extreme caution, as there is a theoretical risk of cross-sensitivity, although the chemical structures differ.
> Important: Your healthcare provider will evaluate your complete medical history, including any history of lung or liver issues, before prescribing Carvedilol.
Safety and effectiveness in patients younger than 18 years of age have not been established. While some specialists use it for pediatric heart failure, this is considered off-label and requires highly specialized monitoring. Growth and development effects in children have not been long-term studied.
In clinical trials, no overall differences in safety or effectiveness were observed between elderly patients (65 and older) and younger patients. However, the elderly are more prone to:
Since carvedilol is primarily metabolized by the liver, it is often a preferred beta-blocker for patients with kidney disease. No initial dose adjustment is required for patients with a low GFR (Glomerular Filtration Rate). It is not significantly removed by hemodialysis due to its high protein binding.
Carvedilol is contraindicated in patients with clinically manifest liver dysfunction. In patients with cirrhosis, the drug concentrations can be 4 to 7 times higher than normal. For patients with mild hepatic impairment, extreme caution and very low doses are mandatory.
> Important: Special populations require individualized medical assessment and frequent follow-up to ensure the medication is working safely.
| Parameter | Value |
|---|---|
| Bioavailability | 25% to 35% (Significant first-pass metabolism) |
| Protein Binding | >98% (Primarily to albumin) |
| Half-life | 7 to 10 hours |
| Tmax | 1 to 2 hours (IR); 5 hours (ER) |
| Metabolism | Hepatic (CYP2D6, CYP2C9) |
| Excretion | Fecal (>60%), Renal (<2% unchanged) |
Carvedilol is classified as a Third-Generation Beta-Blocker. It differs from first-generation (non-selective, e.g., propranolol) and second-generation (beta-1 selective, e.g., metoprolol) drugs by its additional vasodilatory and antioxidant properties.