FIELD : medicine.SUBSTANCE : invention relates to medicine, namely, to therapy and can be used to treat the complications of diabetes, atherosclerosis, rheumatoid arthritis, osteoarthritis, neurodegenerative diseases, including Alzheimer' s and Parkinson’s diseases, cataracts, diseases associated with aging, etc. Use of Sulfasalazine Formula I as an inhibitor of the formation of glycation end products has been proposed. .EFFECT : use of the invention makes it possible to inhibit the end products of glycation with efficiency exceeding that of aminoguanidine.1 cl, 2 tbl, 1 ex