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Researchers say the early changes seen with higher blood pressure may set the stage for problems with thinking, memor"...
Bosentan has been given as a single dose of up to 2400 mg in normal volunteers, or up to 2000 mg/day for 2 months in patients, without any major clinical consequences. The most common side effect was headache of mild to moderate intensity. In the cyclosporine A interaction study, in which doses of 500 and 1000 mg twice daily of bosentan were given concomitantly with cyclosporine A, trough plasma concentrations of bosentan increased 30-fold, resulting in severe headache, nausea, and vomiting, but no serious adverse events. Mild decreases in blood pressure and increases in heart rate were observed.
In the postmarketing period, there was one reported overdose of 10,000 mg of Tracleer taken by an adolescent male patient. He had symptoms of nausea, vomiting, hypotension, dizziness, sweating, and blurred vision. He recovered within 24 hours with blood pressure support.
Bosentan is unlikely to be effectively removed by dialysis due to the high molecular weight and extensive plasma protein binding.
Use of Tracleer is contraindicated in females who are or may become pregnant. To prevent pregnancy, females of childbearing potential must use two reliable forms of contraception during treatment and for one month after stopping Tracleer . [see BOXED WARNING, WARNINGS AND PRECAUTIONS , DRUG INTERACTIONS, Use In Specific Populations].
Use with Cyclosporine A
Coadministration of cyclosporine A and bosentan resulted in markedly increased plasma concentrations of bosentan. Therefore, concomitant use of Tracleer and cyclosporine A is contraindicated [see DRUG INTERACTIONS].
Use with Glyburide
An increased risk of liver enzyme elevations was observed in patients receiving glyburide concomitantly with bosentan. Therefore coadministration of glyburide and Tracleer is contraindicated [see DRUG INTERACTIONS].
Last reviewed on RxList: 7/12/2013
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