Tablet coating agent
Used to coat a tablet to protect against decomposition by atmospheric oxygen or humidity, to provide a desired release pattern, to mask taste or odor, or for aesthetic purposes. Coating may be sugar, film, or enteric. Sugar coating is water-based; forms a thick covering around a tablet. Sugar-coated tablets generallly start to break up in the stomach. Film forms a thin cover around a formed tablet or bead. Unless it is enteric, film dissolves in the stomach. Enteric coating passes through the stomach to break up in the intestines. Some water-insoluble coatings (ethylcellulose) are used to slow the release of drug in the gastrointestinal tract.