Which of the following is often used as a diluent in parenteral medications?

A) Cocoa butter
B) Alcohol
C) Powder
D) Sterile normal saline

D) Sterile normal saline
Sterile normal saline is often used as a diluent in parenteral medications. Powder or cocoa butter cannot be used as diluents because they are either solid or semisolid. Alcohol is not used as a diluent because it has its own strong effects on the body, and a diluent essentially must be a stable, pure liquid.