Sodium citrate is a drug belonging to the group of blood preservatives. It is used for the symptomatic treatment of cystitis, as well as for the preservation of donor blood before transfusion. Citrate is a solid basis for preserving blood during transfusion. When plasma and red blood cells interact with citrate, aggressive environments are created, which is necessary to inhibit the process of gluing them together. Thanks to this property, the quality of the blood is maintained and the possibility of unwanted reactions after transfusion is eliminated. The use of sodium citrate solution is contraindicated in case of hypersensitivity, diabetes mellitus, pregnancy and breastfeeding, heart disease, high blood pressure, acute or chronic cystitis. Possible side effects are anorexia, abdominal pain, vomiting. In rare cases, manifestations of heart rhythm disturbances, allergic reactions, increased blood pressure, and anaphylactic shock are possible. It should be noted that sodium citrate is intended for infusion use exclusively in medical institutions. It is necessary to follow the doctor's recommendations and the prescribed dosage. Long-term use of citrate can lead to a number of side effects, such as electrolyte imbalance,