This paper reports on research into the practice of euthanasia amongst Australian health care professionals specializing in HIV/AIDS. It draws on data from thirty-nine semi-structured interviews carried out in Sydney, Melbourne, Brisbane and Canberra with physicians, general practitioners, hospital and community nurses, therapists and community workers. Using a qualitative methodology, the study seeks to identify how (illegal) euthanasia is currently practised, the degrees of involvement, the various forms that involvement takes, and the social relations which provide the context for involvement. In this paper we outline three categories of 'doers' to illustrate the range of attitudes and practices concerning euthanasia. This 'typology' carries a number of implications for recent policy debates over the legalisation of euthanasia. In particular it illustrates, at least within the context of AIDS care, the fragmentation of consensus over euthanasia amongst health care workers, the reality of current illegal euthanasia practices, and the limitations of a prohibitionist policy. While the legalisation of euthanasia within a regulatory framework is sometimes portrayed as an extreme or 'radical' response to terminal illness, the data presented in this paper suggest that prohibitionism is also radical in its failure to control euthanasia practice.