Erythromycin is not a hormone and does not contain hormones, it is a broad-spectrum antibiotic. The antimicrobial spectrum is closer to that of penicillin, with strong inhibitory effects on Gram-positive bacteria, Gram-negative bacteria, Mycoplasma, Chlamydia and Legionella. It is often used clinically for soft tissue skin infections and respiratory tract infections caused by sensitive bacteria, and is also used for gonorrhea, syphilis and acne. Oral or injectable preparations of erythromycin may cause significant gastrointestinal reactions, mainly in the form of nausea, vomiting, gastrointestinal cramps, and in some cases, diarrhea. Glucocorticosteroids are also widely used in clinical practice and have unusual names, usually with the last word being pine or soxhlet, such as dexamethasone, hydrocortisone, mometasone furoate, clobetasol propionate, and so on.