Different antibiotics correspond to the treatment of different conditions, so the preferred antibiotic needs to be discussed in the context of a certain disease. Common antibiotics include amoxicillin capsules, cefixime dispersible tablets, and roxithromycin capsules. The symptoms for which they are indicated may also vary. 1. Amoxicillin capsule: it can be applied to infections caused by Streptococcus hemolyticus, Streptococcus pneumoniae, Escherichia coli and other germs. For example, otitis media, sinusitis, genitourinary tract infections. Common side effects include diarrhea, nausea, etc. 2. Cefixime Dispersible Tablets: It can be applied to infections caused by pneumococcus, gonococcus, Escherichia coli and other bacteria, such as bronchitis, pneumonia, cholecystitis and so on. Common side effects include diarrhea and skin rash. 3. Roxithromycin Capsule: It can be applied to infections caused by Streptococcus pyogenes, Mycoplasma, Chlamydia, such as tonsillitis, sinusitis, urethritis and cervicitis. Common adverse reactions manifest as nausea, vomiting and so on. Therefore, before using any antibiotic, it is necessary to consult a doctor for diagnosis and use under the guidance of a doctor, and people who are allergic to a certain antibiotic are prohibited from taking that antibiotic.