Study	Reason for exclusion
Bobon 1963	Allocation: randomised. Participants: people with dementia.
Collard 1964	Allocation: randomised. Participants: people with neurosis.
Digo 1967	Allocation: not randomised, CCT using previous treatment with haloperidol as a control.
Flügel 1967	Allocation: not randomised, open study.
Haase 1964	Allocation: not randomised, open study.
Muijen 1992	Allocation: randomised. Participants: people with any psychiatric illness, not schizophrenia.
Nedopil 1981	Allocation: not randomised.
Nedopil 1985	Allocation: randomised. Participants: people with schizophrenia. Interventions: benperidol versus benperidol.
Seiler 1994	Allocation: randomised. Participants: people with schizophrenia. Interventions: benperidol versus benperidol.
Sieberns 1986	Allocation: not randomised.