3. Design of a future study.

Methods	Allocation: randomised ‐ clearly described generation of sequence and concealment of allocation. Blinding: double ‐ described and tested. Duration: 6 months.
Participants	People with schizophrenia or schizophrenia‐like disorder. N = 500. Age: any. Sex: both. History: any.
Interventions	1. High‐potency antipsychotic drug (haloperidol). 2. Low‐potency antipsychotic drugs.
Outcomes	Response (primary outcome) Global state (number of participants improved) Leaving the study early (including specific causes) Death (natural and unnatural causes) Quality of life Satisfaction with care Days in hospital Number of healthy days Side‐effects Employment and other measures of functioning