Pregnancy toxicity grade B: penicillin, amoxicillin, acyclovir, ampicillin-sulbactam, piperacillin-tazobactam, benzathine penicillin, polymyxin B, cefuroxime, cefaclor, cefradine, cefoperazone sodium-sulbactam sodium, ceftriaxone sodium, erythromycin, clindamycin, mezlocillin, meropenem and other antibacterial drugs, and hypoglycemic agents acarbose and metformin.