In central definitions of shared decision-making within medical consultations we find the concept of negotiation used to describe the interaction between patient and professional in case of conflict. It has been noted that the concept of negotiation is far from clear in this context and in other contexts it is used both in terms of rational deliberation and bargaining. The articles explores whether rational deliberation or bargaining accurately describes the negotiation in shared decision-making and finds that it fails to do so on both descriptive and normative grounds. At the end some notes on further analysis is given and it is suggested that the interaction is more accurately described in terms of an internal balancing of values like patient best interest, patient autonomy and patient adherence by the professional that is accepted by the patient.