Zynex-20 is a prescription medication containing 20mg of Esomeprazole, a proton pump inhibitor (PPI) used to reduce stomach acid production. It comes in a pack of 14 tablets and is commonly prescribed for treating conditions like acid reflux, heartburn, and gastric ulcers. This medication works by decreasing acid production in the stomach. It is typically used to treat conditions such as gastroesophageal reflux disease (GERD), stomach ulcers, and other conditions where reducing stomach acid is beneficial. The standard dosage is one tablet daily, but should be taken as prescribed by your healthcare provider. Common side effects may include headache, nausea, and diarrhea. This is a prescription-only medication and should be taken under medical supervision.