alavert and Dalfopristin Interactions

Interactions between alavert(loratadine) and Dalfopristin (dalfopristin)

loratadine and dalfopristin (Moderate Drug-Drug)

MONITOR: Based on in vitro inhibition data, coadministration with dalfopristin-quinupristin may increase the plasma concentrations of drugs that are substrates of the CYP450 3A4 isoenzyme. The mechanism is decreased clearance due to inhibition of CYP450 3A4 activity by dalfopristin-quinupristin.

MANAGEMENT: Caution is advised if dalfopristin-quinupristin must be used concurrently with medications that undergo metabolism by CYP450 3A4, particularly those with a narrow therapeutic range. Dosage adjustments as well as clinical and laboratory monitoring may be appropriate for some drugs whenever dalfopristin-quinupristin is added to or withdrawn from therapy.