Propecia Risks And Benefits. Free Shipping. Worldwide Shipping, No Prescription Required, FDA Approved Drugs, Fast Delivery. Canadian Health Inc. DESCRIPTION. Oral, first-generation cephalosporin used primarily for otitis media and infections of the respiratory tract due to susceptible staphylococci, Streptococcus pneumoniae, and group A beta-hemolytic streptococci. It depends. Some antibiotics are safe to take throughout pregnancy, some pose known risks to a developing baby, and a host of others fall in between. Keflex and Pregnancy Category B The FDA uses a category system to classify the possible risks to a fetus when a specific medicine is taken during pregnancy. The U.S. Food and Drug Administration (FDA) uses a category system to classify the possible risks to a fetus when a specific medicine is taken during pregnancy. Cephalexin (Keflex, Keftabs) is an an antibiotic used to treat bacterial infections of the sinuses, tooth, urinary tract, and throat. Common side effects of Keflex include diarrhea, nausea, abdominal pain, headaches, and vaginitis. Dosage of cephalexin depends on the type of infection. Cephalexin is used to treat a wide variety of bacterial infections. Learn about side effects, drug interactions, dosages, warnings, and more. Antibiotics During Pregnancy. The pregnant woman can take only antibiotics prescribed by the doctor if there is a serious reason for it. It is permissible in cases when the potential damage from antibiotics is smaller than the benefit for both the women and the fetus. Easy-to-read patient leaflet for Cephalexin Suspension. Includes indications, proper use, special instructions, precautions, and possible side effects. Find patient medical information for Cephalexin Oral on WebMD including its uses, side effects and safety, interactions, pictures, warnings and user ratings.