Stories about: drug toxicity

Predicting the probability of a tragedy: A model for teratogenicity

Congenital malformation of the feet caused by thalidomide.

The question comes up when a pregnant woman has a serious medical condition: should she or shouldn’t she be treated? Are the indicated drugs safe for the baby?

Drugs are assigned pregnancy risk classes. Thalidomide, whose reputation for causing fetal malformations was chillingly established in the 1960s, is solidly in Class X (the most risky), as are the cholesterol-lowering drug lovastatin and the anti-coagulant warfarin. At the other extreme are Class A drugs that are widely recognized as safe in pregnancy.

But between these extremes is a huge group of drugs for which little is known.

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