
rifampin-isoniazid oral brand names and other generic formulations include:
IsonaRif Oral, Rifamate Oral
macitentan oral brand names and other generic formulations include:
Opsumit Oral
rifampin-isoniazid oral and macitentan oral
rifampin-isoniazid oral will decrease the level or effect of macitentan oral by altering drug metabolism. Combination may increase blood levels of macitentan.
rifampin-isoniazid oral and macitentan oral
rifampin-isoniazid oral will decrease the level or effect of macitentan oral by affecting hepatic/intestinal enzyme CYP3A4 metabolism. Avoid coadministering macitentan with strong CYP3A4 inducers
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Drug Interaction Categories
Contraindicated
Never use this combination of drugs because of high risk for dangerous interaction
Serious
Potential for serious interaction; regular monitoring by your doctor required or alternate medication may be needed
Significant
Potential for significant interaction (monitoring by your doctor is likely required)
Minor
Interaction is unlikely, minor, or nonsignificant