Cefaclor is a second-generation cephalosporin antibiotic which is used in the treatment of ear, lung, skin, throat, and urinary tract infections as well as pneumonia. Allergic reactions may arise as side effects, for example, rashes, itching, urticaria, serum sickness-like reactions with rashes, fever and arthralgia, and anaphylaxis.
Cefaclor is a semisynthetic antibiotic for oral administration. It is chemically designated as 3-chloro-7-D-(2-phenylglycinamido)-3-cephem-4-carboxylic acid monohydrate. The chemical formula for cefaclor is C15H14ClN304S•H2O and the molecular weight is 385.82.