Purpose of Enteric Coating

An enteric coating is a substance on the medication to act as a barrier to control where in the digestive system the medication is released, protecting it from the acids of the stomach. Most coatings work by having a surface that remains solid in the highly acidic pH stomach but break down when they enter a less acidic, higher pH, environment such as the small intestine. The measurement pH is how acidic or base substance is on a fourteen point scale, with water being 7.0 and neutral. The stomach is about pH 3, while the small intestine is above pH 5.5. Enteric coated medication ensures effectiveness for 24 hours.