As a result of using drugs, phenothiazine tranquilizers, and hydrazine energizers with a few analytic patients, the author has made observations which he feels illuminate certain psychopathological phenomena and which can provide the analyst with an additional dimension in his view of the movement of psychoanalytic events. Ostow describes Freud's concept of libido as a fluid substance or entity supplied by the id to the ego, and required by the ego for its work; in melancholia the ego is depleted (impoverished) and in mania it is surfeited. From this point there is a continuum of ego states, varying from minimal libido in melancholia to overwhelming libido in mania. The author describes, names, and discusses ten such libido positions in an attempt to relate ego libido to the strength of a patient's ego. Several examples of the use of this concept of an egolibido range are given from clinical material.