Friday, 28 March 2014

FCPS part 1 Medicine solved mcqs with explanation Q7



Q7: Which of the followings is P450 inducer?
a) Isoniazid
b) Phenobarbitone
c) Ketoconazole
d) Cimetidine

Correct Answer: b


Explanation:
Phenobarbitone is one of the anticonvulsant. Anticonvulsants in general are inducers of Cytochrome P450 system. Others inducers of P450 are: Rifampin, Griseofulvin, Carbamazepine, Phenytoin.
For inhibitors of P450 remember the Mnemonic: SICK EGgs inhibit your appetite.


S: Sulfonamides
I: Isoniazid
C: Cimetidine
K: Ketoconazole
E: Erythromycin
G: Grapefruit juice.

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