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Drugs & Medications

macitentan

WARNINGS:

Macitentan must not be used during pregnancy. It may harm an unborn baby. It is important to prevent pregnancy while taking this medication and for 1 month after treatment. Therefore, female patients must use reliable birth control during treatment and for 1 month after the end of treatment. Ask your doctor which forms of birth control to use while taking this medication. Female patients must take a pregnancy test before starting treatment and take a monthly pregnancy test during treatment. If you become pregnant or think you may be pregnant, tell your doctor immediately.

To receive this medication, all doctors, pharmacists, and female patients must understand, agree to, and carefully follow the requirements of the Opsumit REMS program developed by the FDA. These requirements apply to female patients in the United States only. If you live in Canada or any other country, consult your doctor and pharmacist for your country's regulations.

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Uses

Macitentan is used to treat high blood pressure in the lungs (pulmonary arterial hypertension). This condition is thought to be caused by increased levels of a certain natural substance (endothelin-1). This medication blocks the effects of endothelin-1, which helps decrease the blood pressure in the lungs, slow the worsening of symptoms from the disease, and improve your ability to exercise.

How to use macitentan

Read the Medication Guide and, if available, the Patient Information Leaflet provided by your pharmacist before you start taking macitentan and each time you get a refill. If you have any questions, ask your doctor or pharmacist.

Take this medication by mouth with or without food as directed by your doctor, usually once daily. Swallow the tablet whole. Do not split, crush, or chew the tablet.

Use this medication regularly to get the most benefit from it. To help you remember, take it at the same time each day.

Do not increase your dose or use this drug more often or for longer than prescribed. Your condition will not improve any faster, and your risk of side effects will increase.

Since this drug can be absorbed through the skin and lungs and may harm an unborn baby, women who are pregnant or who may become pregnant should not handle this medication or breathe the dust from the tablets.

Tell your doctor if your condition does not improve or if it worsens.

Side Effects

Runny nose, sore throat, cough, headache, chills, or body aches may occur. If any of these effects persist or worsen, tell your doctor or pharmacist promptly.

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. Many people using this medication do not have serious side effects.

Tell your doctor right away if you have any serious side effects, including: signs of low red blood cell count (such as unusual tiredness, rapid breathing, pale skin, shortness of breath, fast heartbeat).

Macitentan may rarely cause serious liver disease. Tell your doctor right away if you have any symptoms of liver disease, including: dark urine, persistent nausea/vomiting/loss of appetite, stomach/abdominal pain, yellowing eyes/skin.

Macitentan may decrease sperm production, an effect that may lower male fertility. Consult your doctor for more details.

A very serious allergic reaction to this drug is rare. However, get medical help right away if you notice any symptoms of a serious allergic reaction, including: rash, itching/swelling (especially of the face/tongue/throat), severe dizziness, trouble breathing.

This is not a complete list of possible side effects. If you notice other effects not listed above, contact your doctor or pharmacist.

In the US -

Call your doctor for medical advice about side effects. You may report side effects to FDA at 1-800-FDA-1088.

In Canada - Call your doctor for medical advice about side effects. You may report side effects to Health Canada at 1-866-234-2345.

Precautions

Before taking macitentan, tell your doctor or pharmacist if you are allergic to it; or to other endothelin receptor blockers (such as bosentan); or if you have any other allergies. This product may contain inactive ingredients, which can cause allergic reactions or other problems. Talk to your pharmacist for more details.

Before using this medication, tell your doctor or pharmacist your medical history, especially of: anemia, other lung conditions (such as pulmonary veno-occlusive disease).

Before having surgery, tell your doctor or dentist about all the products you use (including prescription drugs, nonprescription drugs, and herbal products).

This medication must not be used during pregnancy. It may harm an unborn baby. See also Warning section.

Since this drug can be absorbed through the skin and lungs and may harm an unborn baby, women who are pregnant or who may become pregnant should not handle this medication or breathe the dust from the tablets.

It is unknown if this medication passes into breast milk. Because of the possible risk to the infant, breast-feeding while using this drug is not recommended. Consult your doctor before breast-feeding.

Interactions

Drug interactions may change how your medications work or increase your risk for serious side effects. This document does not contain all possible drug interactions. 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.

Other medications can affect the removal of macitentan from your body, which may affect how macitentan works. Examples include azole antifungals (such as ketoconazole), cobicistat, macrolide antibiotics (such as clarithromycin), HIV protease inhibitors (such as ritonavir), rifamycins (such as rifampin), among others.

Overdose

If overdose is suspected, contact a poison control center or emergency room immediately. US residents can call their local poison control center at 1-800-222-1222. Canada residents can call a provincial poison control center.

Notes

Do not share this medication with others.

Laboratory tests (such as liver function tests, pregnancy tests, hemoglobin) should be performed before you start treatment, periodically to monitor your progress, or to check for side effects. Consult your doctor for more details.

Missed Dose

If you miss a dose, take it as soon as you remember. If it is near the time of the next dose, skip the missed dose and resume your usual dosing schedule. Do not double the dose to catch up.

Storage

Store at room temperature away from light and moisture. Do not store in the bathroom. Keep all medications away from children and pets.

Do not flush medications down the toilet or pour them into a drain unless instructed to do so. Properly discard this product when it is expired or no longer needed. Consult your pharmacist or local waste disposal company.

Information last revised November 2014. Copyright(c) 2014 First Databank, Inc.

Images

OPSUMIT 10 MG TABLET
OPSUMIT 10 MG TABLET
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OPSUMIT 10 MG TABLET
OPSUMIT 10 MG TABLET

Identification

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This medicine is a white, round, film-coated tablet imprinted with "10".

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Selected from data included with permission and copyrighted by First Databank, Inc. This copyrighted material has been downloaded from a licensed data provider and is not for distribution, expect as may be authorized by the applicable terms of use.

CONDITIONS OF USE: The information in this database is intended to supplement, not substitute for, the expertise and judgment of healthcare professionals. The information is not intended to cover all possible uses, directions, precautions, drug interactions or adverse effects, nor should it be construed to indicate that use of a particular drug is safe, appropriate or effective for you or anyone else. A healthcare professional should be consulted before taking any drug, changing any diet or commencing or discontinuing any course of treatment.

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