infections
Tetracyclines
Use of Tetracyclines During Pregnancy and Breastfeeding
Pregnant women should not take tetracyclines. These drugs can affect tooth and bone development in the fetus and, if taken late in pregnancy, can cause permanent staining of the fetus's teeth. (See also Safety of Medications During Pregnancy .) Use of tetracyclines during breastfeeding is usually discouraged. (See also Medication and Substance Use During Breastfeeding .) 