Ethical Debates on Chemical Restraint: Conditions for Justification and the Role of Psychiatric Advance Directives

Chemical restraint in psychiatric emergencies occupies a contested space between clinical necessity and human rights imperatives. This narrative review examines the ethical and legal tensions surrounding chemical restraint and coercive treatment, drawing on biomedical literature, legal scholarship, medical ethics, and international human rights instruments. We trace the historical development of chemical restraint, analyze divergent interpretations of the UN Convention on the Rights of Persons with Disabilities, contrast its absolutist reading with proportionality-based frameworks such as the European Convention on Human Rights, and apply the four principles of biomedical ethics to identify conditions under which limited use may be justifiable. We argue that justification requires a cumulative structure of conditions, including impaired decision-making capacity, imminent physical harm, and failure of less restrictive alternatives. We further propose that psychiatric advance directives can serve as a procedural mechanism bridging patients’ stable-state preferences with crisis-point clinical judgment, partially redistributing decisional authority from clinicians to patients themselves.