Ranitidine is a medication that belongs to a class of drugs known as H2 blockers. It works by reducing the amount of stomach acid produced by the stomach, helping to relieve symptoms associated with conditions like gastroesophageal reflux disease (GERD) and peptic ulcers. In 2020, ranitidine was withdrawn from the market in many countries due to concerns about contamination with a potential carcinogen called NDMA. Patients who were using ranitidine have been advised to consult their healthcare providers for alternative treatments to manage their acid-related conditions.