Vonorasan Fumarate is usually available in a box of 7 tablets, 20mg/tablet, usually 1 tablet/dose/day, one box can be used for one week, and it can be used for the treatment of reflux esophagitis. Vonorasan fumarate is a potassium ion competitive acid blocker, which can stay in the cells of the stomach wall for a long time and inhibit the secretion of gastric acid, thus inhibiting the damage of the mucous membrane in the upper part of the gastrointestinal tract, so it can be used for the treatment of reflux esophagitis. For the treatment of reflux esophagitis, 1 tablet is taken once a day, usually 4 weeks as a course of treatment, which can be extended to 8 weeks for patients with poor efficacy. This drug is contraindicated in patients who are allergic to vornoxan fumarate, in patients who are using atazanavir or rilpivirine, and should be used with caution in pregnant and lactating women. Adverse reactions such as diarrhea, constipation, headache, and rash may occur after using the drug. If you need to use Vonorasan Fumarate, do so under the supervision of a physician.