Different kinds of antibiotics produce different side effects, the main antibiotics are cephalosporin antibiotics, macrolide antibiotics, tetracyclic antibiotics, quinolone antibiotics, etc., producing side effects such as gastrointestinal reactions, central nervous system reactions, allergic reactions and so on. 1. Cephalosporin antibiotics: the more common side effects are allergic reactions, including various rashes such as urticaria, leukopenia, interstitial nephritis and so on. Less common side effects include toxic reactions, secondary infections, Hirschsprung’s reaction and so on. 2. Macrolide antibiotics: the main side effects include liver toxicity, effects on the vestibular system, allergic reactions, gastrointestinal reactions and so on. 3. Tetracyclic antibiotics: the side effects of these antibiotics are gastrointestinal reaction, liver damage, kidney damage, allergic reaction, local irritation, etc. They should not be injected intramuscularly. 4. Quinolone antibiotics: the main side effects are gastrointestinal reactions, central nervous system reactions, and general allergic reactions. In addition to the above drug classes, aminoglycosides have side effects such as neuromuscular blockade, ototoxicity, and nephrotoxicity. Side effects vary from person to person and not necessarily for everyone, but one needs to be alert to the occurrence of side effects of medications. Drugs need to be used under the guidance of a medical professional and not at your own discretion.