Samtidig brug af carbamazepin 200 mg to gange daglig medførte et fald i koncentrationen af tipranavir (Cmin faldt med 61% sammenlignet med historiske kontroller), hvilket kan resultere i en forringelse af virkningen.
Concomitant use of carbamazepine at a dose of 200mg BID resulted in decreased concentrations of tipranavir (Cmin decreased by 61% compared to historical controls), which may result in decreased effectiveness.