Macitentan tablets

What is this medicine?

MACITENTAN (ma si ten tan) is used to treat pulmonary hypertension. This medicine may help make exercise and breathing easier.

How should I use this medicine?

Take this medicine by mouth with a glass of water. Follow the directions on the prescription label. Do not cut, crush or chew this medicine. You can take this medicine with or without food. Take your doses at regular intervals. Do not take more often than directed. Do not stop taking except on your doctor's advice.

A special MedGuide will be given to you by the pharmacist with each prescription and refill. Be sure to read this information carefully each time.

Talk to your pediatrician regarding the use of this medicine in children. Special care may be needed.

What side effects may I notice from receiving this medicine?

Side effects that you should report to your doctor or health care professional as soon as possible:

• allergic reactions like skin rash, itching or hives, swelling of the face, lips, or tongue

• breathing problems

• dark urine

• dizziness

• general ill feeling or flu-like symptoms

• light-colored stools

• loss of appetite, nausea

• right upper belly pain

• unusually weak or tired

• yellowing of the eyes or skin

Side effects that usually do not require medical attention (report to your doctor or health care professional if they continue or are bothersome):

• headache

• pain when urinating

• stuffy nose or sore throat

What may interact with this medicine?

• antiviral medicines for HIV or AIDS

• certain medicines for fungal infections like ketoconazole and itraconazole

• rifampin

What if I miss a dose?

If you miss a dose, take it as soon as you can. If it is almost time for your next dose, take only that dose. Do not take double or extra doses.

Where should I keep my medicine?

Keep out of the reach of children.

Store at room temperature between 15 and 30 degrees C (59 and 86 degrees F). Throw away any unused medicine after the expiration date.

What should I tell my health care provider before I take this medicine?

They need to know if you have any of these conditions:

• anemia

• liver disease

• an unusual or allergic reaction to macitentan, other medicines, foods, dyes, or preservatives

• pregnant or trying to get pregnant

• breast-feeding

What should I watch for while using this medicine?

Visit your doctor for regular check ups. Tell your doctor or healthcare professional if your symptoms do not start to get better or if they get worse.

This medicine can cause birth defects. Do not get pregnant while taking this drug. Females with child-bearing potential will need to have a negative pregnancy test before starting this medicine and every month while taking this medicine. Use 2 reliable forms of birth control together while you are taking this medicine and for 1 month after you stop taking this medicine. If you think that you might be pregnant talk to your doctor right away.

This medicine has caused reduced sperm counts in some men. This may interfere with the ability to father a child. You should talk to your doctor or health care professional if you are concerned about your fertility.