Aminoglycan chondroitin is recommended to be taken by patients after breakfast or dinner, that is, twice a day in the morning and evening after meals. There are different brands of chondroitin that may have special requirements, such as taking it once a day or three times a day, and it is recommended that patients try to keep it after meals to avoid the gastrointestinal tract-related irritation that may be caused by taking such medications. If a patient is taking such a drug once a day, it is recommended that the patient take it in the morning after a meal. The main ingredient of chondroitin is glucosamine sulfate or glucosamine hydrochloride, together with chondroitin sulfate. The main function of this drug is to promote the formation of cartilage matrix inside the articular cartilage, which in turn can be used as an adjunct to the treatment of diseases caused by cartilage damage or destruction, such as cartilage damage or osteoarthritis.