The UK Supreme Court’s recent judgement inMcCulloch v Forth Valley Health Boardclarifies the standard for the identification of ‘reasonable’ alternative medical treatments. The required standard is that of a reasonable doctor: treatments that would be accepted as proper by a responsible body of medical opinion. Accordingly, the assessment of consent involves a two-stage test: first, a ‘reasonable doctor’ test for identifying alternative treatments; followed by a ‘reasonable person in the patient’s position’ test for identifying the material risks of these reasonable (...) alternative treatments. The separation of consent into two stages is consistent with not only a certain conception of freedom but also a nuanced construct of respect for autonomy that has a normative base. Furthermore, reliance on a reasonable doctor in the first stage is in keeping with a sociological account of medical professionalism, which posits that only doctors, and none others, can determine what is a proper treatment. Yet, reliance on a reasonable doctor permits a plurality of standards for reasonableness, because differences in opinion among doctors are pervasive. The reasons for some differences might be acceptable as unavoidable imperfections in medical decision-making to a reasonable person. But reasons for other differences might be objectionable; and the resultant inequalities in medical treatments would be considered unfair. One solution is to make the plurality of reasonable alternatives available to the patient, but this would introduce practical uncertainty and it is rejected by the Court. The Court’s approach may be pragmatic; however, it seems to allow avoidable injustice in healthcare. (shrink)