The symptoms of adverse drug reactions are usually gastrointestinal reactions, allergic reactions, other adverse reactions and so on. 1. Gastrointestinal reaction: If you take anti-inflammatory drugs, the more common adverse reactions are gastrointestinal reactions, such as nausea, vomiting, epigastric discomfort, stomach pain or diarrhea, and possibly constipation. 2. Allergic reaction: some patients may have allergic reactions, such as skin rash, itching, redness and swelling, and in severe cases, even anaphylactic shock. 3. Other adverse reactions: other adverse reactions may also have teratogenic effects, drug dependence, toxic reactions, etc., may cause harm to the body. Therefore, the medication must be taken under the guidance of a doctor, not unauthorized use of drugs, to avoid causing adverse reactions to the body.