Leucomycin is also known as guitaromycin, the role and efficacy of guitaromycin is mainly antibacterial and anti-inflammatory, guitaromycin medication may have adverse reactions, there are also contraindications, should be guided by a doctor to use the drug. Guithromycin is an antibiotic with antibacterial and anti-inflammatory effects, and is mainly used for the treatment of respiratory tract infections caused by sensitive Gram-positive bacteria, skin and soft-tissue infections, streptococcal pharyngitis, diphtheria, scarlet fever, whooping cough, gonorrhea, legionnaires’ disease, nongonorrheal urethritis, acne and other diseases. Adverse reactions such as skin itching and rash may occur after the administration of Guithromycin. It is contraindicated for those who are allergic to Guithromycin and macrolide antibiotics, and should be used with caution for those with hepatic insufficiency, pregnant women and lactating women. Guitamin should be taken under the guidance of a professional doctor and should not be abused.