Lagrangian with off-shell vertices and field redefinitions

Meson-exchange diagrams following from a Lagrangian with off-shell meson-nu cleon couplings are compared with those generated from conventional dynamic s. The off-shell interactions can be transformed away with the help of a nu cleon field redefinition. Contributions to the nucleon-nucleon and three-nu cleon potentials and nonminimal contact electromagnetic meson-exchange curr ents are discussed, mostly for the important case of scalar meson exchange.