Study	Reason for exclusion
Adler 1987	Allocation: not randomised.
Adler 1988	Allocation: not randomised.
Adler 1993	Allocation: randomised. Participants: people with chronic schizophrenia, schizoaffective disorder, major depression with psychosis. Interventions: propanolol versus benztropine versus placebo. Outcomes: no usable data, 9 of 28 participants were given concomitant benzodiazepines, no seperate data available.
Friss 1983	Allocation: randomised, cross‐over design. Participants: people whose diagnosis was not specified, suffering from neuroleptic‐induced akathisia. Interventions: valproate versus biperiden versus placebo. Outcomes: no data about allocation in first period. Dr Gerlach (author) contacted and replied promptly; data were destroyed and no more information is available.
Gagrat 1978	Allocation: randomised. Participants: people with psychotic disorders, suffering from neuroleptic‐induced akathisia. Interventions: benzodiazepine versus diphenhydramine, none versus placebo.
Hermesh 1988	Allocation: not randomised, not controlled clinical trial.
Hirose 2000	Allocation: unclear. Participants: people with psychotic disorders, suffering from neuroleptic‐induced akathisia. Interventions: biperiden at different dosages.
Horiguchi 1992	Allocation: randomised. Participants: people with schizophrenia, suffering from neuroleptic‐induced akathisia. Interventions: benzodiazepine versus anticholinergic, none versus placebo.
Neu 1972	Allocation: randomised. Participants: people with psychotic disorders, suffering from neuroleptic‐induced akathisia. Interventions: anticholinergic versus anticholinergic, none versus placebo.
Sachdev 1993	Allocation: randomised. Participants: people with schizophrenia, suffering from neuroleptic‐induced akathisia. Interventions: benztropine (iv) versus propranolol (iv) versus placebo (iv). Outcomes: no usable data, two of the 6 participants were taking benzodiazepines, no separate data available.
Zeng 1995	Allocation: unclear. Participants: people suffering from neuroleptic‐induced akathisia. Interventions: dexetimide versus benzhexolum, no placebo group.