FDA Pregnancy Category B: Safety for use in pregnancy has not been established

Amoxicillin

Amoxicillin/clavulanate (Augmentin)

Ampicillin

Cefuroxime (Ceftin)

Cephalexin (Keflex)

Nitrofurantoin (Furadantin)

Pregnancy Category C: No adequate well-controlled studies have been performed in women; should be used during pregnancy only if the potential benefit justifies the potential risk to the fetus

Ciprofloxacin (Cipro)

Gatifloxacin (Tequin)

Levofloxacin (Levaquin)

Norfloxacin (Noroxin)

Trimethoprim/sulfamethoxazole (Bactrim, Septra)