Drug Interaction Report

GENERALLY AVOID: Coadministration of chloramphenicol with other agents that can cause bone marrow depression, aplastic anemia, or agranulocytosis may increase the risk and/or severity of hematologic toxicity. Serious and fatal blood dyscrasias (aplastic anemia, hypoplastic anemia, thrombocytopenia, granulocytopenia, and bone marrow depression) have been reported after short-term and long-term systemic therapy with chloramphenicol.

MANAGEMENT: Concurrent use of chloramphenicol with other agents that can cause bone marrow depression, aplastic anemia, or agranulocytosis, such as sulfonamides, nucleoside reverse transcriptase inhibitors, procainamide, phenylbutazone, clozapine, and depot formulations of antipsychotic drugs, should be avoided.

ADJUST DOSING INTERVAL: Food enhances the oral bioavailability of umbralisib. When a single oral dose of umbralisib was administered with a high-fat, high-calorie meal (approximately 917 calories; 171 calories from protein, 232 calories from carbohydrate, 502 calories from fat) in healthy subjects, umbralisib peak plasma concentration (Cmax) and systemic exposure (AUC) increased by 115% and 61%, respectively, compared to administration under fasted conditions.

MANAGEMENT: Umbralisib should be administered with food at approximately the same time each day.