Pharmacology Mechanism of action of imatinib mesylate is : A Increase in metabolism of P glycoprotein B Blocking the action of P glycoprotein C Blocks the action of chimeric fusion protein of bcr–abl D Non–competitive inhibition of ATP binding site 💡 Explanation Mechanism of action of imatinib mesylate is : ✓ Correct Answer: C. Blocks the action of chimeric fusion protein of bcr–abl