Diclofenac sodium tablets may cause special pain in the stomach and intestines, which is an adverse drug reaction. 1. Diclofenac sodium tablets belong to non-steroidal anti-inflammatory and analgesic drugs, not only for the treatment of acute gout, acute and chronic rheumatoid arthritis, osteoarthritis, spondyloarthropathies and other joints caused by swelling and pain and other symptoms; but also for the treatment of toothache, menstrual cramps or postoperative pain and so on. 2. Taking diclofenac sodium tablets may cause adverse reactions such as abdominal pain, diarrhea, constipation, heartburn, urinary tract infection, headache, and may also increase the risk of peptic ulcer or gastrointestinal bleeding. It is contraindicated in patients with allergic reactions, urticaria, asthma or other allergic reactions to this product and aspirin or other non-steroidal anti-inflammatory drugs, and in patients with peptic ulcers. 3. In addition, patients with a history of vertigo or other central nervous system disorders should be prohibited from driving or operating machinery while taking the drug. It is recommended to use the drug under the guidance of a doctor, not blindly self-medication, if the occurrence of obvious symptoms of discomfort, should promptly go to a regular hospital.