Amoxicillin, is a semi-synthetic penicillin. It has a strong antibacterial effect and is also widely used in clinical practice as an oral penicillin drug. The main indications: infections of the respiratory system, infections of the urinary tract, skin as well as soft tissues, etc., are all effective. Amoxicillin can also be used against H. pylori infections. When applying amoxicillin, it is important to pay attention to any allergic reactions. If there is a history of previous allergy to penicillin, amoxicillin is not recommended for application. With a history of weakly positive allergy, a penicillin sensitivity test is recommended before oral administration of amoxicillin, and if it is negative it can be applied.