  A Lagrangian description is presented which can be used in conjunction with
particle interpretations of quantum mechanics. A special example of such an
interpretation is the well-known Bohm model. The Lagrangian density introduced
here also contains a potential for guiding the particle. The advantages of this
description are that the field equations and the particle equations of motion
can both be deduced from a single Lagrangian density expression and that
conservation of energy and momentum are assured. After being developed in a
general form, this Lagrangian formulation is then applied to the special case
of the Bohm model as an example. It is thereby demonstrated that such a
Lagrangian description is compatible with the predictions of quantum mechanics.
