Hello Thank you for your query, Cefixime has been assigned to pregnancy category B by the FDA. This means that animal studies have failed to reveal evidence of harm in the fetes. No human studies exist to prove potential harm. It is given during pregnancy only when the risk outweighs the benefits. As you do not know yet whether you are pregnant, you should inform your Dentist about the possibility so that safer antibiotics maybe substituted. Also, tooth extraction is inevitable if required as stated by your dentist. Take care.