Common adverse drug reactions in the elderly include the following: 1. Gastrointestinal symptoms, such as nausea, vomiting, abdominal distension, diarrhea, such adverse reactions are mostly seen in antibiotics and chemotherapy drugs. 2. General swelling, obesity, hair growth, osteoporosis and other symptoms are common side effects of glucocorticoids. 3. The majority of drugs are metabolized by the liver and kidneys, so the elderly are more likely to cause liver and kidney function damage. 4, hearing loss is a common adverse drug reaction to streptomycin. 5, epilepsy, the elderly are prone to induce seizures when using quinolones. 6, rash is also a relatively common adverse drug reaction, including penicillin, cephalosporin, aminoglutethimide hydrochloride and other drugs can cause rash in the elderly. 7, cognitive impairment, the elderly in the use of benzedrine hydrochloride tablets and topiramate Cognitive impairment can be caused by the use of drugs such as Benzedrine tablets and topiramate.