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All about: Bosentan

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Some commonly used brand names are:

In the U.S.—

  • Tracleer

In Canada—

  • Tracleer

Category

  • Antihypertensive, (pulmonary)
  • Endothelin receptor antagonist

Description

Bosentan (BOH-sen-tan) is used to treat the symptoms of pulmonary arterial hypertension. This is the high blood pressure that occurs in the main artery that carries blood from the right side of the heart (the ventricle) to the lungs. When the smaller blood vessels in the lungs become more resistant to blood flow, the right ventricle must work harder to pump enough blood through the lungs. Bosentan works by blocking a hormone (a naturally occurring substance), that is found in the blood and lungs in large quantities of the people with pulmonary arterial hypertension. Bosentan helps by increasing the supply of blood to the lungs and reducing the workload of the heart.

This medicine is available only with your doctor's prescription, in the following dosage forms:

  • Oral
  • Tablets (U.S. and Canada)

Before Using This Medicine

In deciding to use a medicine, the risks of using the medicine must be weighed against the good it will do. This is a decision you and your doctor will make. For bosentan, the following should be considered:

Allergies—Tell your doctor if you have ever had any unusual or allergic reaction to bosentan. Also tell your doctor and pharmacist if you are allergic to any other substances, such as foods, preservatives, or dyes.

Pregnancy—Bosentan is not recommended during pregnancy. It has been shown to cause serious birth defects or other problems in animals. Be sure you have discussed this with your doctor.

Monthly pregnancy tests are needed, and a gynecologist should help to decide what contraceptives should be used. Your doctor should be notified immediately if there is any delay in the start of your menstrual cycle, and any other reason to think that you may be pregnant.

Breast-feeding—It is not known whether bosentan passes into breast milk. Although most medicines pass into breast milk in small amounts, many of them may be used safely while breast-feeding. Mothers who are using this medicine and who wish to breast-feed should discuss this with their doctor.

Children—Studies on this medicine have been done only in adult patients, and there is no specific information comparing use of bosentan in children with use in other age groups.

Older adults—Many medicines have not been studied specifically in older people. Therefore, it may not be known whether they work exactly the same way they do in younger adults or if they cause different side effects or problems in older people. There is no specific information comparing use of bosentan in the elderly with use in other age groups.

Other medicines—Although certain medicines should not be used together at all, in other cases two different medicines may be used together even if an interaction might occur. In these cases, your doctor may want to change the dose, or other precautions may be necessary. Tell your health care professional if you are taking any other prescription or nonprescription (over-the-counter [OTC]) medicine. When you are taking bosentan, it is especially important that your doctor and pharmacist know if you are taking any of the following:

  • CYP2C9 inhibitors (amiodarone [e.g., Cordarone], fluconazole [e.g., Diflucan]) together with
  • CYP3A4 inhibitors (itraconazole [e.g., Sporanox], ketoconazole [e.g., Nizoral], ritonavir [e.g., Norvir]—These two kinds of medicine taken together with bosentan can cause the amount of bosentan in your body to increase. Taking a combination of these medicines with bosentan is not recommended.
  • Cyclosporin A (e.g., Neoral)—Use of this medicine with bosentan can cause both medicines to not work properly
  • Hormonal contraceptives that are implantable (e.g., Norplant), injectable (e.g., Lunelle), oral (e.g., Triphasil), or transdermal (“the patch” [e.g., Ortho-Evra]—Bosentan may prevent contraceptives from working properly and may result in an unplanned pregnancy. Do not use these as your only form of birth control.
  • Hypoglycemic agents, oral (e.g., Glyburide) —Use of this medicine with bosentan can cause both medicines to not work properly
  • Ketoconazole (e.g., Nizoral)—This medicine may increase the effects of bosentan.
  • Statins, such as:
    Atorvastatin (e.g. Lipitor) or
    Lovastatin (e.g., Mevacor) or
    Simvastatin (e.g. Zocor)—Bosentan may decrease the effects of these medicines

Other medical problems—The presence of other medical problems may affect the use of bosentan. Make sure you tell your doctor if you have any other medical problems, especially:

  • Liver disease—Bosentan may make these conditions worse in patients who have moderate or severe liver disease. Use of bosentan should generally be avoided in patients with liver disease, if possible.

Proper Use of This Medicine

Dosing—The dose of bosentan will be different for different patients. Follow your doctor's orders or the directions on the label . The following information includes only the average doses of bosentan. If your dose is different, do not change it unless your doctor tells you to do so.

The number of tablets that you take depends on the strength of the medicine. Also,

  • For oral dosage form (tablets):
    • For high blood pressure
      • Adults—62.5 milligrams twice daily for 4 weeks, then increased to 125 milligrams twice a day. For patients who weigh less than 40 kilograms (88 pounds) and who are over 12 years of age, the dose is 62.5 milligrams twice a day.

Missed dose—If you miss a dose of this medicine, take it as soon as possible. However, if it is almost time for your next dose, skip the missed dose and go back to your regular dosing schedule. Do not double doses.

Storage—To store this medicine:

  • Keep out of the reach of children.
  • Do not store in the bathroom, near the kitchen sink, or in other damp places. Heat or moisture may cause the medicine to break down.
  • Do not keep outdated medicine or medicine no longer needed. Ask your health care professional how you should dispose of any medicine you do not use. Be sure that any discarded medicine is out of the reach of children.

Precautions While Using This Medicine

It is very important that your doctor check your progress at regular visits to make sure this medicine is working properly and to check for unwanted effects.

It is also important that your doctor does a blood test to check your liver function before you start bosentan and each month after that.

Do not use hormone-based birth control (pills, injections, patches, and implants) as your only method of birth control while you are taking this medicine.

In addition, check with your doctor immediately if you experience dark urine, light colored stools, loss of appetite, nausea and vomiting, unusual tiredness, yellow eyes or skin, fever with or without chills, or stomach pain.

Side Effects of This Medicine

Along with its needed effects, a medicine may cause some unwanted effects. Although not all of these side effects may occur, if they do occur they may need medical attention.

Check with your doctor immediately if any of the following side effects occur:

More common

Blurred vision; confusion; dizziness; dark urine; faintness or lightheadedness when getting up from a lying or sitting position; fever with or without chills ; light-colored stools; loss of appetite; nausea and vomiting; stomach pain; sudden sweating; unusual tiredness or weakness; yellow eyes or skin

Less common

Swelling

Frequency not known

Blue lips and fingernails; chest pain; coughing that sometimes produces a pink frothy sputum; coughing up blood; decrease in amount of urine; difficult, fast, noisy breathing, sometimes with wheezing; fainting; fast heartbeat; fatigue on exertion; fever; hives; increased sweating; itching; irritation; hoarseness; joint pain, stiffness, or swelling; noisy, rattling, breathing; pale skin; rash; redness of skin; shortness of breath; swelling of eyelids, face, lips, hands, fingers, legs, ankles, or feet; tightness in chest; troubled breathing at rest; troubled breathing or swallowing; weight gain; wheezing

Symptoms of overdose

Get emergency help immediately if any of the following symptoms of overdose occur

Blurred vision; confusion; dizziness ; faintness or lightheadedness when getting up from a lying or sitting position ; headache; increased heart rate ; nausea; sudden sweating; unusual tiredness or weakness; vomiting

Other side effects may occur that usually do not need medical attention. These side effects may go away during treatment as your body adjusts to the medicine. However, check with your doctor if any of the following side effects continue or are bothersome.

More common

Fast, irregular, pounding, or racing heartbeat or pulse; feeling of warmth; muscle aches; redness of the face, neck, arms, and occasionally upper chest; stuffy or runny nose; swelling of the legs; sore throat; unusual tiredness or weakness

Less common

Acid or sour stomach; belching ; heartburn; indigestion; itching skin; stomach discomfort, upset or pain

Other side effects not listed above may also occur in some patients. If you notice any other effects, check with your doctor.

Developed: 11/13/2002
Revised: 02/15/2006

The information contained in the Thomson Healthcare (Micromedex) products as delivered by Drugs.com is intended as an educational aid only. It is not intended as medical advice for individual conditions or treatment. It is not a substitute for a medical exam, nor does it replace the need for services provided by medical professionals. Talk to your doctor, nurse or pharmacist before taking any prescription or over the counter drugs (including any herbal medicines or supplements) or following any treatment or regimen. Only your doctor, nurse, or pharmacist can provide you with advice on what is safe and effective for you.

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