BACKGROUND: Gastroesophageal reflux disease (GERD) is one of the most common gastric pathologies. Recently, there has been a growing interest in the healing effects of mineral waters (MW). METHODS: Ninety patients with GERD were under observation. The study used the following methods: anamnestic, clinical, studies of biochemical blood parameters, ultrasonographic studies of the digestive system, fibroesophagogastroduodenoscopy with intragastric pH-metric. After preliminary research, all patients were randomly divided into three groups of 30 people. The control group (group 1) who were prescribed a basic treatment complex-dietary and proton pump inhibitor group drugs. Patients of group 2 in addition to the standard course of treatment received boric highly mineralized bicarbonate sodium water. Patients of group 3 in addition to the basic therapy were prescribed an internal course treatment of highly mineralized sulfate-bicarbonate sodium-magnesium water. RESULTS: The use of the basic complex of treatment for a month in control group did not lead to a significant leveling of signs of dyspeptic and asthenic syndromes. The use of boron highly mineralized sodium bicarbonate water led to a significant leveling of signs of abdominal pain and dyspeptic syndromes, improvement of acid-forming function of the stomach, but no reliable dynamics were observed in eliminating signs of cytolytic, mesenchymal inflammatory and cholestatic syndromes. Application of highly mineralized sulfate-hydrocarbonate sodium magnesium water improves the elimination of dyspepsia and pain syndromes, normalization of the functional state of the liver. CONCLUSIONS: The obtained data confirm the prospects of using highly mineralized mineral waters in the complex treatment of GERD patients.