See NPR: Study Clears Most Antibiotic Use In Pregnant Women
A study this month from the Centers for Disease Control and Prevention finds that most common antibiotics — penicillins — appear to be safe. But the study raises a red flag with two types of antibiotics, sulfa drugs (brand names include Bactrim and Thiosulfil Forte) and urinary germicides (brand names Macrobid and Furadantin). These medications are typically used to treat urinary tract infections.