Angus 1969.

Methods	Allocation: randomly assigned (according to a code prepared in advance and held by the pharmacist). Blindness: double. Design: 2 parallel group, single centre. Duration: 6 months (results in 6 weeks). Analysis: intention‐to‐treat. Country: USA.
Participants	Diagnosis: Scheneider criteria. N=42. Age: range 17‐57 years, mean 38.5 years. Sex: M 14, F 28. Setting: hospital.
Interventions	1.Trifluoperazine: range 7.5‐45 mg/day. N=22. 2.SK&F 14,336: range 100‐600 mg/day. N=20.
Outcomes	Global state: (global ratings of improvement). Side‐effects. Use of antiparkinson agents. Unable to use ‐ Mental state: (BPRS ‐ no data). Behaviour: (NOSIE ‐ no data). Leaving the study early ‐ no usable data. Global state: (degree of severity of the illness scale ‐ no data).
Notes
Risk of bias
Bias	Authors' judgement	Support for judgement
Allocation concealment?	Low risk	A ‐ Adequate