What category of drugs in the five-category system is reported to have fetal risks but can be used in a pregnant woman if the potential benefit outweighs the risk?

Category D drugs

Explanation:

There are five categories of drugs, they include: categories A, B, C, D and X. Research shows that category D drugs have possible fetal risks, however, the potential benefits on the mothers still outweighs the risk. An example of a category D drug is Losartan.

Category A drugs have no evidence of risk on fetus, an example is folic acid.

Category B drugs also show no adequate evidence of risk on the fetus. An example is metformin.

Evidences shows Category X drugs have an adverse effect on the fetus, hence the risk outweighs the potential effect. An example is Methotrexate.