Within how many hours must a woman have a negative pregnancy test before beginning treatment with thalidomide?
24 hours
48 hours
72 hours
96 hours
24 hours
Rationale: A woman must have a negative pregnancy test within 24 hours before beginning treatment with thalidomide. This drug is mainly used as a treatment of certain cancers and for complications of leprosy. Thalidomide has been linked to severe malformations of the limbs of children born to women who took it during pregnancy.
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