This is a multicenter, prospective, randomized, double-blind, controlled, study in 2 parallel groups.
Experimental and control administration protocols will be standardized to harmonize injection practices between the different nurses providing care, and to control some variables. Nurses will have been trained in these protocols and in experimental injection techniques.
The experimental group will be offered an intramuscular injection using the "Z-track" and "Airlock" techniques, while the control group will have an "usual" injection.
An intermediate analysis of futility and efficacy is planned once 50% of the planned sample has completed the study.
The object of the research is the intramuscular injection procedure - Product injected: haloperidol decanoate (Haldol Decanoas®).
