what is an enteric-coated drug?

Source: Food and Drug Administration (FDA)

Enteric-coated drugs are designed to pass through the stomach unaltered and to disintegrate in the small intestine. Therefore, enteric coatings prevent the release of medication before it reaches the small intestine.

Drugs such as aspirin, which have an irritant effect on the stomach, can be coated with a substance that will only dissolve in the small intestine.

EC is the abbreviation of enteric coated.

--- the enteric coated aspirin 81 mg does not upset the stomach because it dissolves in the small intestine.

--- EC Naprosyn is the enteric coated Naproxen and therefore it does not worsen stomach problems because it disintegrates in the small intestine.