"Administer" means the direct application of a controlled substance, whether by injection, inhalation, ingestion, or any other means, to the body of a patient for his immediate needs or to the body of a research subject by any of the following:
(a) A practitioner or, in his presence, by his authorized agent.
(b) The patient or research subject at the direction and in the presence of the practitioner.
(Added by Stats. 1972, Ch. 1407, Sec. 3.)