While receiving discharge instructions after a hepatitis b vaccine, the client asks the health care practitioner if the injection is considered a drug. how would the health care practitioner respond?

The health care practitioner would let the client know that the hepatitis B vaccine/injection is a drug, and belongs to the  Opportunistic Infections and Coinfections drug class according to US Department of Health and Human Services.

Explanation:

fluid balance is an aspect of the homeostasis of organisms in which the amount of water in the organism needs to be controlled, via osmoregulation and behavior, such that the concentrations of electrolytes (salts in solution) in the various body fluids are kept within healthy ranges. the core principle of fluid balance is that the amount of water lost from the body must equal the amount of water taken in.