Aminosaccharide is a cartilage nutritional drug, mainly used for the treatment of bone and joint degeneration or cartilage damage in middle-aged and elderly people. Its main side effects are as follows: 1. Gastrointestinal side effects will occur, some people will have constipation, diarrhea, and others will have abdominal distension, abdominal pain, etc. 2. Some patients will have mild drowsiness after taking aminosaccharide. 3. Some patients will have allergic symptoms after taking aminosaccharide orally, and will have skin rashes, localized red spots on the body, etc. 4. It is best not to take it for a long time for patients with liver and kidney insufficiency and patients with low liver and kidney function, and it is also best not to take it for more than two months. If the above adverse reactions occur, you should immediately stop the drug, go to a regular hospital for examination, under the guidance of a doctor for regular treatment.