According to the American College of Obstetricians and Gynecologists, many commonly prescribed immunomodulating drugs can be used safely during pregnancy or breastfeeding under the supervision of a doctor.
Some immunomodulating drugs, such as methotrexate and leflunomide, can be harmful to a developing fetus and shouldn't be taken during pregnancy or breastfeeding.
It’s important to discuss your medications with a doctor if you’re pregnant, planning to become pregnant, or are breastfeeding.