Clinical Research Directory

Inclusion Criteria: * Voluntarily provide written informed consent by the participant and his/her legal representative; * Aged 18-65 years, weight ≥ 45 kg, body mass index 19-35 kg/m², male or female; * Diagnosed with stable schizophrenia, with 1 antipsychotic agent at a stable dose for ≥ 4 weeks before screening; * Positive and Negative Syndrome Scale (PANSS) total score ≤ 80, with each positive sub-scale item score \< 5. Exclusion Criteria: * history of allergies to ≥3 different substances, or active allergic disease; * Past history of neuroleptic malignant syndrome or with current medical conditions including heart failure, acute coronary syndrome, stroke, orthostatic hypotension, dementia, Parkinson's disease, epilepsy, tardive dyskinesia, etc; * Received any investigational product within 12 weeks before screening; * Received strong/moderate inhibitors or inducers of CYP3A4 or CYP2D6 enzymes, or traditional Chinese medicines within 1 week before dosing; * Pregnant or lactating, or with a positive pregnancy test; * With plan for pregnancy, sperm/ovum cryopreservation or donation, and refuse to use effective contraception from screening through 6 months after last dosing; * With white blood cell ≤ 3 × 10⁹/L; neutrophil ≤ 1 × 10⁹/L; platelet ≤ 80 × 10⁹/L; hemoglobin ≤ 80 g/L; ALT ≥ 2 × ULN; AST ≥ 2 × ULN; total bilirubin ≥ 1.5 × ULN; CK ≥ 3 × ULN; serum creatinine ≥ 1.5 × ULN; triglycerides ≥ 3.0 mmol/L; glycated hemoglobin (HbA1c) ≥ 7.5 %; systolic blood pressure ≥ 160 mmHg or ≤ 90 mmHg; diastolic blood pressure ≥ 100 mmHg or ≤ 60 mmHg; heart rate ≤ 50 bpm or ≥ 110 bpm; QTcF \> 470 ms (female) / \> 450 ms (male); FT4 outside reference range; positive hepatitis B surface antigen; positive hepatitis C antibody; positive HIV antibody; positive syphilis serology test; * Other conditions unsuitable for the trial judged by the investigator.