Oral infections commonly require treatment during pregnancy. The antibiotics listed below are all generally safe to take during pregnancy with the caveats listed below.
Sheehy O, Santos F, Ferreira E, Berard A. The use of metronidazole during pregnancy: a review of evidence. Curr Drug Saf. 2015;10(2):170-9. doi: 10.2174/157488631002150515124548. PMID: 25986038.
Motherisk. Toronto, Ontario, Canada at www.motherisk.org (which included referencing National Collaborative Perinatal Project, 1959-1974, Record Group 443, National Institutes of Health.)
Hilgers KK, Douglass JM, Mathieu GP. Adolescent Pregnancy: A Review of Dental Treatment Guidelines. Pediatr Dent 2003;25:459-467.
Oral Health Care During Pregnancy Expert Workgroup. 2012. Oral Health Care During Pregnancy: A National Consensus Statement-Summary of an Expert Workgroup Meeting. Washington, DC: National Maternal and Child Oral Health Resource Center.
Briggs GC, Freeman RK, Yaffe SJ. Drugs in Pregnancy and Lactation, Ninth Edition. Lippincott Williams and Wilkins, Philadelphia, PA 2011.