Dextran is not recommended for lifelong use, this drug is an anti-anxiety, antidepressant, with dual effect, can be very good to improve mood and somatization symptoms. However, the disadvantage of this drug is that it has a certain degree of dependence, patients often have difficulty withdrawing the drug, and symptoms often rebound and relapse after the drug is discontinued, resulting in the need for long-term medication, the longer the drug is used the more effort it takes to withdraw the drug, so the recommended duration of medication is about 3-6 months. Patients who have been on the medication for more than 6 months should try to reduce the dosage, stop the medication, or switch to other medications. If this drug has become dependent and needs to be taken for life, it is also important to regularly monitor liver function and kidney function, etc., and have blood drawn and rechecked once every 2-3 months to prevent liver and kidney function damage due to side effects brought about by the drug, etc. If there are other irreversible side effects or serious damage to health, the drug must be stopped immediately.