Risek is used to treat gastroesophageal reflux disease (GERD), ulcers in the upper intestine or stomach, ulcers caused by bacteria called Helicobacter pylori, and ulcers caused by medicines called nonsteroidal anti-inflammatory drugs (NSAIDs).
Risek can also be used to prevent ulcers from forming if you are taking NSAIDs, and for increased stomach acid caused by growth of the pancreas (Zollinger-Ellison syndrome).