Abstract: Changes brought by the Mental Health Act (MHA) to clinical practice, and some of the problems it has created for nurses, are examined in this article. Compulsory assessment and treatment orders (CATO) and the role of Duly Authorised Officers (DAO), and moral dilemmas that can arise as a consequence of CATOs used by DAOs are examined. The requirement for DAOs to act as patient advocates and to safeguard cultural beliefs are highlighted. The MHA promotes self responsibility and a treatment philosophy rather than detention of the mentally ill.