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.
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 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 should I discuss with my healthcare provider before taking bosentan?
Do not use this medication if you are allergic to bosentan, or if you:
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.
How should I take bosentan?
Take bosentan exactly as it was prescribed for you. Do not take the medication in larger
or smaller amounts, or take it for longer than recommended by your doctor.
Take each dose with a full glass (8 ounces) of water.
Bosentan can be taken with or without food.
Bosentan is usually taken twice a day, morning and evening.
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.
Store bosentan at room temperature away from moisture and heat.
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