In this chapter:
(1) “Administer” means the direct application of a vaccine or a prescribed drug or device, whether by injection, ingestion or any other means, to the body of a patient or research subject by any of the following:
(a) A practitioner or his or her authorized agent.
(b) A patient or research subject at the direction of a practitioner.
(c) A pharmacist.
(d) In the case of an opioid antagonist, any person.
(1m) “Advanced practice nurse prescriber” means an advanced practice nurse who is certified under s. 441.16 (2).