Psychoeducational multifamily group treatment based on the McFarlane model was implemented for adult patients experiencing a first episode of psychosis and for the families of 301 patients. Patients were participants in a research project in Norway and Denmark. Of 301 patients 246 were invited to participate and 147 agreed. Patients' reluctance to participate increased with age. Most had to wait between six and 12 months until a sufficient number was gathered to start a group. Treatment was well received by patients and families. Care should be taken to prevent a long delay before group commencement at this stressful period in the lives of patients and families.