Interaction between Fosaprepitant and Acalabrutinib
Major
Metabolism
| ID | DDInter778 and DDInter9 |
| Interaction | Coadministration with moderate inhibitors of CYP450 3A4 may significantly increase the plasma concentrations of acalabrutinib, which is primarily metabolized by the isoenzyme. Increased acalabrutinib exposure may potentiate the risk of toxicities such as hemorrhage, infection, cytopenias, malignancies, and atrial fibrillation or flutter. |
| Management | The dosage of acalabrutinib should be reduced to 100 mg once daily when coadministered with moderate CYP450 3A4 inhibitors. |
| References | |
| Alternative for Fosaprepitant | - |
| Alternative for Acalabrutinib |
L01X
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Potential Metabolism Interactions
Substrate-Substrate Interaction：If more than one drug is metabolized by the same CYP, it is possible that its metabolism is inhibited because of the competition between the drugs. That means, it can be useful to lower the dosage of the drugs in the drug-cocktail because they remain longer in the organism than in monotherapy.
Inhibitor-Inhibitor Interaction：Combining two or more inhibitors of one CYP, should be compensated by lowering the dosage of these drugs because the metabolism is reduced and the drugs remain longer in the organism than in monotherapy. Not adapting the dosage bears the risk of even more side effects.
Inhibitor-Substrate Interaction：Combining drugs that have inhibitory effect and are substrates of one particular CYP, should be compensated by lowering the dosage. They rest longer in the organism than in monotherapy. Not adapting the dosage bears the risk of even more side effects.