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). 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. 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. The obtained data confirm the prospects of using highly mineralized mineral waters in the complex treatment of GERD patients.