Ampicillin is the trade name for ampicillin capsules, which are used to treat infectious diseases caused by sensitive bacteria. The drug has strong antibacterial effect on Gram-positive cocci, bacilli, Gram-negative bacteria, etc. Its mechanism of action is to inhibit the synthesis of the bacterial cell wall, so that the bacteria quickly rupture and dissolve. Therefore, the drug is clinically used for the treatment of respiratory tract infections, urinary system infections, digestive tract infections, ear, nose and throat infections, skin, soft tissue infections and other diseases caused by sensitive bacteria. There are adverse reactions such as nausea, vomiting, diarrhea and mild abdominal pain after using the drug. It is forbidden for those who are allergic to penicillins, cephalosporins or patients with positive penicillin skin test; forbidden for patients with uric acid kidney stones and acute attack of gout; forbidden for patients with active peptic ulcer. Before use, patients should be asked in detail about the history of drug allergy and penicillin skin test; hepatic and renal insufficiency, pregnant and lactating women should be cautious. If you need to use the drug, should be used under the guidance of a physician.