Which enzyme is most commonly induced by carbamazepine that can affect many drugs including antipsychotics?

Which enzyme is most commonly induced by carbamazepine that can affect many drugs including antipsychotics?

• A. CYP3A4
• B. CYP2C9
• C. CYP1A2
• D. CYP7A1

Answer: (A)

Carbamazepine strongly induces CYP3A4, the enzyme that handles the metabolism of a large number of drugs, including many antipsychotics. When CYP3A4 is induced, it speeds up the breakdown of these drugs, lowering their plasma concentrations and potentially reducing efficacy. This is why CYP3A4 is the enzyme most commonly affected by carbamazepine. While other enzymes like CYP2C9 or CYP1A2 can be influenced in various situations, they are not the primary pathway for carbamazepine’s broad drug interactions. CYP7A1 is not a drug-metabolizing enzyme, so it doesn’t explain these interactions.

Carbamazepine strongly induces CYP3A4, the enzyme that handles the metabolism of a large number of drugs, including many antipsychotics. When CYP3A4 is induced, it speeds up the breakdown of these drugs, lowering their plasma concentrations and potentially reducing efficacy. This is why CYP3A4 is the enzyme most commonly affected by carbamazepine. While other enzymes like CYP2C9 or CYP1A2 can be influenced in various situations, they are not the primary pathway for carbamazepine’s broad drug interactions. CYP7A1 is not a drug-metabolizing enzyme, so it doesn’t explain these interactions.