A 40 year old woman taking the oral contraceptive pill was prescribed phenytom following a...

RCEM FRCEM Question Answer

A 40 year old woman taking the oral contraceptive pill was prescribed phenytom following a seizure Some months later she becomes pregnant

What is the most likely mechanism by which this treatment has led to tailure of her contraception?

Alteration of intestinal flora

Increased renal clearance of the contraceptive pill

Inhibition of oestrogen receptors

Interference with protein binding of the contraceptive pill

Liver enzyme induction

RCEM FRCEM Summary

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