Dexlansoprazole is a medication that is used to treat conditions related to stomach acid such as GERD (gastroesophageal reflux disease) and erosive esophagitis. This drug belongs to a group of drugs called proton pump inhibitors (PPIs) which work by reducing the amount of acid produced by the stomach. Synonyms for dexlansoprazole include Dexilant, Kapidex, and Takeda. Dexilant is the brand name for dexlansoprazole, while Kapidex is the former brand name for this medication. Takeda is the pharmaceutical company that produces and markets dexlansoprazole. It is important to note that these synonyms are specific to the medication dexlansoprazole and should not be used interchangeably with other PPIs.