[The following is loosely inspired by a compare-and-contrast re-reading of Scanlon’s material on coercion in his Moral Dimensions (p. 74, 78, 108-111) and Michael Huemer’s initial discussion of coercion – in his stipulative sense that simply means exercising or threatening to exercise physical violence or control over another person – in his The Problem of Political Authority (pp. 9-10).]
1. One might coerce someone by doing things that impact or interfere with their exercise of their agency in a ways that are never permissible. One might also coerce someone by doing things that impact or interfere with their exercise of their agency in ways that are permissible if the patient consents – but they have not consented (and in the right circumstances like having full information and with the conditions of consent or non-consent not themselves being coercive). Both sorts of coercion presuppose antecedent moral requirements, moral requirements not to do specific things that negatively impact the ability of others to exercise their agency. So the requirement not to coerce would seem to be a generalization over particular ways of interfering with the agency of others that are of these two types (absolutely forbidden, forbidden unless the patient consents).