Dasatinib and Diltiazem interaction
Dasatinib and Diltiazem: the Dasatinib prescribing label flags this combination with the strongest language, such as a contraindication, a boxed warning, or an instruction to avoid it.
Do not combine without a prescriber's guidance. The label language below is the strongest FDA uses.
What the FDA labels say
From the Dasatinib (PHYRAGO) label · effective 2025-08-23
Avoid concomitant use of strong CYP3A4 inhibitors.
If concomitant administration of a strong CYP3A4 inhibitor cannot be avoided, consider a dose reduction [see Dosage and Administration ( 2.3 )] .
QT Prolongation PHYRAGO may increase the risk of prolongation of QTc in patients including those with hypokalemia or hypomagnesemia, patients with congenital long QT syndrome, patients taking antiarrhythmic medicines or other medicinal products that lead to QT prolongation, and cumulative high-dose anthracycline therapy [see Adverse Reactions ( 6.1 )] .
DRUG INTERACTIONS Strong CYP3A4 Inhibitors: Dose reduction may be necessary.
Effect of Other Drugs on Dasatinib Strong CYP3A4 Inhibitors The coadministration with strong CYP3A inhibitors may increase dasatinib concentrations [see Clinical Pharmacology ( 12.3 )] .
Taking more than these two? Interactions stack. Check your whole list at once; it stays in your browser.
Open in the checkerNot medical advice. Interaction Checker quotes FDA label text and NIH fact sheets. Whether an interaction matters for you depends on doses, timing, kidney and liver function, and other conditions. Confirm with a pharmacist or prescriber.