FIELD: medicine, pharmacology, peptides. SUBSTANCE: invention relates to methods of preparing drugs based on peptides that normalize functions of different organs and tissues. Method of preparing peptides involves selection of two amino acids containing in the most amount in analyzed tissue on the basis of results of quantitative analysis of acetic acid extracts of animal tissues. Then central link is synthesized from these amino acids to which amino acids containing in the most amount in analyzed tissues are bound. EFFECT: tissue-specific activity of prepared peptides and pharmaceutical compositions containing peptides as active component. 6 cl, 1 tbl, 2 dwg, 5 ex
