Dextran, a combination of haloperidol and melitrexin, is a commonly used antidepressant with a more significant effect on mild and moderate depression. Its effect in treating depression is to turn a depressed state of mind into a normal one, and the pharmacological effect has a tendency to excite the nervous system. Therefore, the following side effects can occur at therapeutic doses, such as insomnia, sleep disturbance, restlessness, tremor, and fatigue easily, etc. Overdose of the drug can cause excitement, agitation, hallucinations, dilated pupils, tachycardia, convulsions, fever, etc. In view of this situation, it is necessary to take Dextran in the morning as well as at noon to avoid insomnia and restlessness in the evening.