Study	Reason for exclusion
Meng 1998	Allocation: quote: "randomised according to sequence of coming for treatment" ‐ quasi‐randomised. Participants: people with schizophrenia. N = 63. Interventions: WDD + sulpiride (100 mg/d, twice daily) vs sulpiride (200 mg/d, three times daily).
Shi 2010	Allocation: quote: "randomised according to sequence of coming for treatment" ‐ quasi‐randomised. Participants: people with schizophrenia. N = 78. Interventions: WDD + sulpiride (start with 0.4 g/d, add 0.2 g/d every 2 days, until 0.8 g/d to 1.2 g/d in 2 weeks) vs haloperidol (start with 6 mg/d, add 4 mg/d every 2 days, until 20 mg/d to 40 mg/d in 2 weeks).

WDD: Wendan decoction