Macitentan Medication: Uses, Dosage, Side Effects, and Cost

Summary of Key Points

Macitentan is a prescription medication used to treat various forms of pulmonary hypertension, a condition characterized by high blood pressure in the arteries of the lungs. It works by relaxing blood vessels, improving blood flow, and reducing the strain on the heart. Typically, Macitentan is taken once daily, and it’s important to follow your doctor’s instructions closely. If you have any questions, feel free to consult one of our telemedicine providers today.

Names of Medication

US Brand Name: Opsumit (Macitentan)

The generic name refers to the active ingredient, while the brand name is assigned by the manufacturer. In this case, Macitentan is the generic name.

Pharmacologic Category

Endothelin Receptor Antagonists (ERAs)

Macitentan Dosage Guidelines

Macitentan is prescribed for various types of pulmonary hypertension and related conditions in adults. Below are the dosing guidelines for each condition. Always consult your doctor before adjusting your dose or starting any new medication. You can also schedule a telemedicine appointment with one of our providers for personalized advice.

1. Pulmonary Arterial Hypertension (PAH): 10 mg once daily. Continue treatment as prescribed by your doctor.
2. Chronic Thromboembolic Pulmonary Hypertension (CTEPH): 10 mg once daily. Treatment duration may vary based on individual response.
3. Heart Failure: 10 mg once daily. Your doctor will determine the appropriate treatment duration.
4. Eisenmenger Syndrome: 10 mg once daily. Duration depends on your condition and response to the medication.
5. Pulmonary Hypertension Associated with Connective Tissue Disease: 10 mg once daily. Continue treatment as directed by your healthcare provider.
6. Pulmonary Hypertension Associated with HIV: 10 mg once daily. Your doctor will advise on the treatment duration.
7. Pulmonary Hypertension Associated with Congenital Heart Disease: 10 mg once daily. Continue treatment as recommended by your healthcare provider.
8. Pulmonary Hypertension Due to Left Heart Disease: 10 mg once daily. Your doctor will determine the treatment duration.
9. Idiopathic Pulmonary Arterial Hypertension: 10 mg once daily. Continue treatment as recommended by your healthcare provider.

Dosage Forms and Strengths

Tablet, Oral: 10 mg

How to Take Macitentan

Macitentan is taken orally, usually once daily, with or without food. It’s important to take the medication at the same time each day to maintain consistent levels in your body. Do not crush or chew the tablet; swallow it whole with water. If you miss a dose, take it as soon as you remember. However, if it’s almost time for your next dose, skip the missed dose and continue with your regular schedule. Do not double the dose to make up for a missed one. Always follow your doctor’s instructions, and if you have concerns, reach out to one of our telemedicine providers for guidance.

Contraindications for Macitentan

A contraindication is a specific condition where a medication should not be used because it may be harmful. For Macitentan, several contraindications should be noted:

1. Pregnancy: Macitentan can cause serious harm to an unborn baby. It is classified as a Category X medication, meaning it should never be used during pregnancy. Women of childbearing age must use reliable contraception while taking Macitentan.
2. Severe liver disease: Macitentan is processed by the liver. If you have severe liver disease, your body may not break down the medication properly, leading to increased side effects or toxicity.
3. Allergy to Macitentan: If you have had an allergic reaction to Macitentan or any of its ingredients, you should not take this medication, as it could lead to severe allergic reactions, including anaphylaxis.

Macitentan Drug Interactions

Macitentan can interact with other medications, which may increase the risk of side effects or reduce the effectiveness of one or both drugs. Some of the most important interactions include:

1. Rifampin (Rifadin): This antibiotic can reduce the effectiveness of Macitentan by speeding up how quickly it is broken down in the body.
2. Ketoconazole (Nizoral): This antifungal medication can increase Macitentan levels in your blood, raising the risk of side effects.
3. Cyclosporine (Neoral, Sandimmune): This immunosuppressant can increase Macitentan concentration in your system, leading to a higher risk of side effects.
4. Warfarin (Coumadin): This blood thinner may interact with Macitentan, potentially increasing the risk of bleeding.

Always inform your healthcare provider about all medications, supplements, and herbal products you are taking before starting Macitentan. If you are unsure about potential interactions, schedule a telemedicine appointment with one of our providers to discuss your medication profile.

Macitentan in Pregnancy

Is it safe to take Macitentan when pregnant? No, Macitentan is not safe during pregnancy. It is classified as a Category X medication, meaning it can cause birth defects or harm to an unborn baby. Women who are pregnant or planning to become pregnant should avoid taking Macitentan. If you are of childbearing age and using Macitentan, it is essential to use effective contraception. If you become pregnant while taking Macitentan, contact your healthcare provider immediately.

Macitentan While Breastfeeding

Is it safe to take Macitentan while breastfeeding? It is not recommended to take Macitentan while breastfeeding. Although there is limited information on whether Macitentan passes into breast milk, the potential for serious side effects in a nursing infant suggests avoiding breastfeeding while on this medication. Speak with your healthcare provider about alternative treatments if you are breastfeeding or planning to breastfeed.

Estimated Cost of Macitentan Medication

The estimated cost of a 30-day supply of Macitentan without insurance ranges from $7,000 to $9,000. However, using a GoodRx coupon, the cost may be reduced to approximately $6,500 to $7,500. Prices can vary depending on the pharmacy and location. Be sure to explore available discounts or patient assistance programs to help manage the cost of Macitentan.

Possible Alternatives to Macitentan

If Macitentan is not suitable for you, or if you are exploring alternative treatments, other medications and lifestyle changes may help manage pulmonary hypertension and related conditions. Always discuss these alternatives with your healthcare provider before making any changes to your treatment plan. You can also schedule a telemedicine appointment with one of our providers to explore your options.

Alternative Treatments for Pulmonary Arterial Hypertension (PAH)

Alternatives to Macitentan for PAH include other endothelin receptor antagonists like bosentan (Tracleer) or ambrisentan (Letairis), phosphodiesterase-5 inhibitors such as sildenafil (Revatio), and lifestyle changes like regular exercise and a low-sodium diet.

Chronic Thromboembolic Pulmonary Hypertension (CTEPH) Alternatives

For CTEPH, Riociguat (Adempas) is another medication option. Surgical treatments, such as pulmonary endarterectomy, may also be considered.

Heart Failure Treatment Options

For heart failure, medications like ACE inhibitors, beta-blockers, and diuretics may be beneficial. Lifestyle changes, including reducing salt intake, engaging in regular physical activity, and managing stress, are also important.

Eisenmenger Syndrome Treatment Options

Treatment options for Eisenmenger syndrome include oxygen therapy, blood thinners, and medications like sildenafil (Revatio) or bosentan (Tracleer).

Pulmonary Hypertension Associated with Connective Tissue Disease

For pulmonary hypertension associated with connective tissue disease, medications like prostacyclin analogs (e.g., epoprostenol) or phosphodiesterase-5 inhibitors (e.g., sildenafil) may be used.

Pulmonary Hypertension Associated with HIV

Treatment for pulmonary hypertension associated with HIV focuses on managing HIV with antiretroviral therapy, along with medications for pulmonary hypertension like sildenafil (Revatio) or bosentan (Tracleer).

Pulmonary Hypertension Associated with Congenital Heart Disease

Treatment for pulmonary hypertension associated with congenital heart disease may include medications like sildenafil (Revatio) or surgical interventions to correct the underlying heart defect.

Pulmonary Hypertension Due to Left Heart Disease

Managing pulmonary hypertension due to left heart disease involves treating the underlying heart condition with medications like ACE inhibitors or beta-blockers. Lifestyle changes, such as reducing sodium intake and regular exercise, may also help.

Idiopathic Pulmonary Arterial Hypertension (IPAH) Treatment Options

Treatment options for IPAH include prostacyclin analogs, phosphodiesterase-5 inhibitors, and endothelin receptor antagonists like bosentan (Tracleer) or ambrisentan (Letairis).

Recent Updates on Macitentan Research

Recent studies have focused on the long-term effects of Macitentan in treating pulmonary arterial hypertension (PAH). The SERAPHIN trial, a landmark study, demonstrated that Macitentan significantly reduces the risk of disease progression and hospitalization in PAH patients. Ongoing research is exploring the use of Macitentan in combination with other therapies to further improve outcomes. Additionally, studies are investigating its potential benefits in treating other forms of pulmonary hypertension, such as chronic thromboembolic pulmonary hypertension (CTEPH) and pulmonary hypertension associated with connective tissue diseases.

As research continues, new findings may lead to expanded uses for Macitentan or improved treatment strategies. Stay in touch with your healthcare provider to discuss any new developments that may affect your treatment plan. You can also schedule a telemedicine appointment with one of our providers to stay updated on the latest research and treatment options.

James Kingsley

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