liquid, supplement form parenteral preparation Parenteral preparations are not dietary supplements per se, but are included in this classification because of their importance in nutrient intake. Parenteral preparations are sterile, pyrogen-free liquids (solutions, emulsions, or suspensions) or solid dosage forms containing one or more active ingredients, packaged in either single-dose or multidose containers. There are four main forms of parenteral preparations: injections, intravenous infusions (large volume parenterals), powders for injections, and implants. [http://apps.who.int/phint/en/p/docf/] requires discussion