The purpose of this clinical trial is to explore the efficacy of drug therapy under the guidance of pharmacogenomics test in the treatment of patients with depression. The main questions to be answered in this study are:

1. Whether the drug treatment regimen under the guidance of pharmacogenomics test is beneficial to the rehabilitation of patients with depression.
2. Pharmacogenomics tests whether it can reduce adverse drug reactions during treatment, and be evaluated by the scale before and after treatment.

The researchers will compare the pharmacogenomics test group with the healthy control group to see the effect of drug therapy under the guidance of pharmacogenomics test on the efficacy of patients with depression.

Drug treatment of mental disorders is often seriously hindered by huge differences in individual drug responses or drug side effects, which are closely related to genetic factors. Pharmacogenomics testing can help clinicians to provide better drug choices for patients. In this study, a single center randomized controlled design was used, including 300 cases in the drug gene detection group and 300 cases in the healthy control group. Hamilton Depression scale (HAMD) and side effects scale (TESS) were used to evaluate the efficacy of pharmacogenomics test in the treatment of depression before and after treatment.

Inclusion Criteria:

1) Diagnosis of depressive disorder based on DSM-V criteria by two or more senior psychiatrists; 2) Hamilton Depression Scale (HAMD) score more than 14; 3) Age between 14 and 75 years; 4) Completed at least middle school education or higher and capable of completing the assessment scales; 5) Good compliance with medication treatment.

Exclusion Criteria:

1) Presence of mental retardation or significant medical history of other major physical illnesses (including a history of cranial trauma or infection, intracranial tumors, cerebrovascular diseases, epilepsy, etc.); 2) History of benzodiazepine sedative-hypnotic drug, alcohol, or other substance abuse; 3) History of electroconvulsive therapy; 4) Pregnancy or lactation.