Cachets offer a means of administering comparatively large amounts of disagreeable powders, but they offer very little protection from light, moisture, or mechanical handling. They are also large to swallow and must be moistened by immersion in water immediately prior to swallowing with water. Cachets vary in size from three-fourth of an inch to one-eighth of an inch in diameter and consist of two concave pieces of wafer made of flour and water. One part is filled with the required quantity of drug and then sealed by pressing both the margins tightly after moistening them. When moistened with water, they become soft, elastic, and slippery. The shells of cachets are molded from rice paper and are used to enclose quantities of medium density dry powder of fill weight between 200 mg and 2 g. Cachets are used to administer drugs with an unpleasant taste in a tasteless form