What is Bosentan?
Bosentan prevents thickening of the blood vessels, especially those in the lungs and heart. Bosentan also lowers blood pressure in your lungs, helping your heart pump blood more efficiently.
Bosentan is used to treat pulmonary arterial hypertension (PAH). It improves your ability to exercise and prevents your condition from getting worse.
Bosentan may also be used for other purposes not listed in this medication guide.
What is the most important information I should know about bosentan?
This medication can cause birth defects in an unborn baby. Do not use if you are pregnant. Tell your doctor right away if you become pregnant during treatment. Use an effective barrier form of birth control (such as a condom or diaphragm with spermicide gel or inserts). Hormonal forms of contraception (such as birth control pills, injections, implants, skin patches, and vaginal rings) may not be effective enough to prevent pregnancy during your treatment.
Your doctor may have you take a pregnancy test before you start using this medicine, to make sure you are not pregnant. You may also be re-tested each month during your treatment.
Do not use this medication if you are allergic to bosentan, or if you are also taking cyclosporine (Sandimmune, Neoral, Gengraf), glyburide (Micronase, DiaBeta, Glynase Pres Tab), or HIV/AIDS medication that contains lopinavir or ritonavir (Kaletra, Norvir).
Bosentan can cause severe liver problems. Symptoms include nausea, stomach pain, low fever, loss of appetite, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes). Call your doctor at once if you have any of these symptoms. Your liver function will need to be tested before you start taking bosentan, and again each month during your treatment.
Do not stop taking bosentan without first talking to your doctor. You may need to use less and less before you stop the medication completely.
What should I discuss with my healthcare provider before taking bosentan?
Do not use this medication if you are allergic to bosentan, or if you:
are also taking HIV/AIDS medication that contains lopinavir or ritonavir (Kaletra, Norvir);
are also taking using glyburide (Micronase, DiaBeta, Glynase Pres Tab);
are pregnant or might become pregnant during treatment; or
are also using cyclosporine (Sandimmune, Neoral, Gengraf).
Bosentan can cause severe liver problems. Symptoms include nausea, stomach pain, low fever, loss of appetite, dark urine, clay-colored stools, jaundice (yellowing of the skin or eyes). Call your doctor at once if you have any of these symptoms. Your liver function will need to be tested before you start taking bosentan, and again each month during your treatment.
FDA pregnancy category X. This medication can cause birth defects. Do not use bosentan if you are pregnant. Tell your doctor right away if you become pregnant during treatment. Use an effective barrier form of birth control (such as a condom or diaphragm with spermicide gel or inserts). Hormonal forms of contraception (such as birth control pills, injections, implants, skin patches, and vaginal rings) may not be effective enough to prevent pregnancy during your treatment.
Your doctor may have you take a pregnancy test before you start using this medicine, to make sure you are not pregnant. You may also be re-tested each month during your treatment.
It is not known whether bosentan passes into breast milk or if it could harm a nursing baby. Do not take this medication without telling your doctor if you are breast-feeding a baby.