The purpose of this study was to evaluate the implementation of a protocol to standardise euthanatics among pharmacists and general practitioners (GPs). Data over 1993 and 1994 were collected by means of an anonymous postal questionnaire sent to all pharmacists (n = 37) and all GPs (n = 283) working in the area in which the protocol was implemented. In total, 76% of the pharmacists and 63% of the GPs responded. All pharmacists and 65% of the GPs were aware of the existence of the protocol and all pharmacists and 42% of the GPs were also familiar with the content of the protocol. Both pharmacists and GPs had fairly positive attitudes towards the importance and possibility of the standardisation of euthanatics. Of the GPs who performed euthanasia or assisted with suicide during the research period, 59% made use of one or more standard packages. The majority of pharmacists and GPs were satisfied with the standard packages, and all GPs indicated that they intend to use the packages again in the future. This study shows that the implementation of standardised euthanatics was quite successful.