Epilepsy is often treated with a combination of drugs such as carbamazepine and phenytoin (polytherapy). CYP3A4 is induced by phenytoin and carbamazepine. Carbamzeipine is cleared by CYP3A4, but phenytoin is not cleared by CYP3A4. What problems might you expect if (a) carbamazepine is removed or (b) phenytoin is removed from this two-drug regimen.

Curren'S Math For Meds: Dosages & Sol
11th Edition
ISBN:9781305143531
Author:CURREN
Publisher:CURREN
Chapter10: Reconstitution Of Powdered Drugs
Section: Chapter Questions
Problem 4.7P
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Epilepsy is often treated with a combination of drugs such as carbamazepine and phenytoin (polytherapy). CYP3A4 is induced by phenytoin and carbamazepine. Carbamzeipine is cleared by CYP3A4, but phenytoin is not cleared by CYP3A4.

What problems might you expect if (a) carbamazepine is removed or (b) phenytoin is removed from this two-drug regimen. 

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