Experts are questioning the value of the A,B,C,D,X pregnancy rating system for meds

Experts are questioning the value of the A,B,C,D,X pregnancy rating system for meds.

Clinicians commonly refer to current categories A,B,C,D,X to make decisions about using a drug in pregnancy. But these categories are often oversimplified and can be misleading.

For example, omeprazole is category C whereas the other PPIs are "B." But omeprazole is often the PPI of choice because it has the most data for use during pregnancy.

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