Trypsin is a proteolytic enzyme of the pancreas. Trypsin cleaves most food proteins to polypeptides and amino acids. The optimum action at pH = 8-9. In the pancreas, an inactive trypsin precursor is produced - trypsinogen, which is converted into active trypsin in the intestine by the action of enterokinase. Active trypsin activates chymotrypsinogen (see Chymotrypsin ) and pancreatic juice procarboxypeptidase. The definition of trypsin in the duodenal contents is used as an indicator of the functional state of the pancreas. Trypsin drugs (trypsin, chymotrypsin, himopsin) have anti-inflammatory and anti-edematous properties; able to break down dead tissue areas, fibrinous formations, exudates , etc. Trypsin preparations are used externally and orally as prescribed by a doctor (per os, intramuscularly and intrapleurally). Contraindications to the use of trypsin drugs: cardiovascular insufficiency of II — III degree, emphysema and decompensated forms of pulmonary tuberculosis, acute dystrophy and cirrhosis of the liver, hepatitis and pancreatitis , increased bleeding. Side effects - pain and hyperemia at the injection site. It is recommended to inject antihistamines before injection of trypsin. See also Enzymes .