Nonsterile Basics of Compounding: Using U.S. Food and Drug Administration-approved Commercial Products as Ingredients.

Throughout history, pharmacists have used natural products, chemicals, and other materials for prescription compounding. In the past, these chemicals and materials were obtained from natural preparations, raw materials, and even household ingredients. Today, compounding pharmacists use chemicals from various legitimate sources, depending on availability and may even use manufactured drug products as the drug source for compounding (this is especially true in hospital intravenous admixture programs).