Stomach acid drugs, known as PPIs (proton pump inhibitors), are linked to a higher risk of diarrhea caused by Clostridium difficile, a type of bacterium. Patients on PPIs who develop persistent diarrhea should be tested for CDAD (Clostridium difficile associated diarrhea), says the US Food and Drug Administration (FDA).

If you are taking PPIs, and have diarrhea that does not go away, you should see your doctor immediately, the FDA advises. Examples of PPIs include: Dexlansoprazole  Esomeprazole Lansoprazole  Omeprazole  Pantoprazole  Rabeprazole  PPIs are used for the treatment of: Dyspepsia Gastroesophageal reflux disease (GERD) Laryngopharyngeal reflux Peptic ulcer disease (PUD) Barrett's esophagus Gastrinomas and other conditions that cause hypersecretion of acid Prevention of stress gastritis Zollinger-Ellison syndrome Persistent diarrhea,  One that does not get better, is commonly…