Many powders that are OTC drugs with active ingredients have specific functionality such as kill fungus (athlete’s foot), relieve the symptoms of the common cold, or sooth the skin (anti-irritants). These ingredients include sodium bicarbonate, acetaminophen, aspirin, salicylamide, and various other ingredients specific to each product. The functionality and physical properties of these powders are very similar if not the same as any other cosmetic powder. They must maintain their physical properties with age and storage in order to maintain their activity and deliver the proper ingredient dosage when applied. If the powder cakes up it may not have the same activity as the loose form. Cosmetic powders can also contain active ingredients (both OTC and non-OTC) that serve a variety of functions along with all the conventional ingredients we find in cosmetics. These conventional ingredients deliver all the desired cosmetic attributes that we look for in a cosmetic powder and work together with the active ingredients to provide for a uniform functional product.
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