It is mainly used for the treatment of infections in patients who are allergic or resistant to penicillin, such as acute tonsillitis, acute pharyngitis, sinusitis, scarlet fever, cellulitis, diphtheria, syphilis and other infections. It is also used for mycoplasma pneumonia, chlamydia pneumonia, chlamydia trachomatis conjunctivitis, oral infections caused by anaerobic bacteria, legionellosis, and also for the prophylactic treatment of rheumatic fever recurrence or infective endocarditis. Rituxan granules belong to macrolide antibiotics, which is also a kind of antibacterial agent.