CHYMOJEK

Indications

• Pancreatitis
• Surgical procedures requiring protein digestion
• Post-operative recovery
• Inflammatory conditions

Dosage

Children: Refer to established clinical guidelines for dosing recommendations.

Adults: Refer to established clinical guidelines for dosing recommendations.

Mechanism of action

Chymotrypsin functions by cleaving peptide bonds at the carboxyl side of aromatic amino acids, such as tryptophan, phenylalanine, and tyrosine. This proteolytic activity reduces the size of protein molecules, facilitating their absorption and utilization in the body. The enzyme's action is highly specific and efficient, contributing to the overall digestive process.

Pharmacodynamics

Chymotrypsin exhibits its effects primarily through its enzymatic activity, enhancing the digestion of dietary proteins and facilitating nutrient absorption. Additionally, it may exert anti-inflammatory effects by modulating the immune response and reducing edema in tissues. Its activity is influenced by factors such as pH, temperature, and the presence of other ions or molecules in the digestive system.

Pharmacokinetics

Chymotrypsin is administered orally or via injection, where it is absorbed through the gastrointestinal tract or directly into the bloodstream. Once in circulation, it is distributed to tissues where it exerts its enzymatic effects. The enzyme is subject to degradation by proteolytic enzymes in the body, and its activity can be influenced by the physiological state of the patient, including factors such as age, health status, and concurrent medications. The half-life of chymotrypsin varies based on the route of administration and individual patient factors.

Contra-indications

• Hypersensitivity to chymotrypsin or any component of the formulation
• Active bleeding disorders
• History of gastrointestinal ulcers
• Severe renal impairment

Adverse effects

• Allergic reactions including rash, itching, and anaphylaxis
• Gastrointestinal disturbances such as nausea, vomiting, and diarrhea
• Local irritation at the injection site
• Increased risk of bleeding due to its proteolytic activity

Interactions

• May enhance the effects of anticoagulants due to increased proteolytic activity
• Use with caution in patients taking other medications that affect hemostasis
• No significant drug-drug interactions are well documented

Precautions

• Use with caution in patients with a history of allergic reactions
• Monitor for signs of bleeding in patients with compromised hemostasis
• Assess renal function before administration in patients with renal impairment

Pregnancy

Chymotrypsin should be used during pregnancy only if the potential benefit justifies the potential risk to the fetus, as studies on its safety in pregnant women are lacking.

Breast-feeding

It is not known whether chymotrypsin is excreted in human milk. Caution should be exercised when administering to nursing women.

Storage

Store at room temperature, away from light and moisture. Keep out of reach of children.

Formulations

• Chymotrypsin injection solution
• Chymotrypsin enteric-coated tablets

Indications

• Pancreatic insufficiency
• Malabsorption syndromes
• Cystic fibrosis
• Chronic pancreatitis

Dosage

Children: Refer to the BNF for Children for appropriate dosing information tailored to paediatric patients.

Adults: Refer to the prescribing information or BNF for specific dosing guidelines based on the condition being treated and the formulation used.

Mechanism of action

Trypsin acts by cleaving peptide bonds in proteins, particularly at the carboxyl side of lysine and arginine residues. This enzymatic activity is essential for protein digestion, leading to the conversion of proteins into smaller peptides and free amino acids, which can be readily absorbed by the intestinal mucosa. The activation of trypsinogen to trypsin is catalyzed by the enzyme enteropeptidase, which is secreted by the intestinal mucosa.

Pharmacodynamics

The pharmacodynamic effects of trypsin are primarily related to its role in protein digestion. It aids in the breakdown of complex protein structures into smaller peptides, which enhances nutrient absorption. Additionally, trypsin may influence various physiological processes by modulating protein signaling pathways, although these effects are less well-characterized compared to its digestive role.

Pharmacokinetics

Trypsin is typically administered exogenously in a proteolytic enzyme supplement form, particularly for conditions associated with pancreatic insufficiency. When taken orally, it is subject to degradation in the gastrointestinal tract; hence, it is often encapsulated to protect it from gastric acid. Its absorption is generally poor, and any systemic effects are limited due to rapid inactivation in the systemic circulation. Clinical studies indicate that trypsin may be absorbed in small amounts, but its primary use remains local to the gastrointestinal tract.

Contra-indications

• Hypersensitivity to trypsin or any of its components
• Active gastrointestinal bleeding
• Severe renal impairment
• History of pancreatitis

Adverse effects

• Gastrointestinal disturbances such as nausea, vomiting, and diarrhea
• Allergic reactions including rash and urticaria
• Increased risk of bleeding
• Local irritation at the site of administration

Interactions

• Anticoagulants may have enhanced effects when used with trypsin due to its proteolytic activity
• Corticosteroids may interfere with the action of trypsin
• Other proteolytic enzymes may have additive effects

Precautions

• Use with caution in patients with a history of allergies
• Monitor for signs of bleeding in patients with clotting disorders
• Evaluate renal function before initiating therapy
• Caution in patients with a history of gastrointestinal disorders

Pregnancy

There are no well-controlled studies in pregnant women. Use only if the potential benefit justifies the potential risk to the fetus.

Breast-feeding

It is not known whether trypsin is excreted in human milk. Caution should be exercised when administering to nursing women.

Storage

Store in a cool, dry place away from direct sunlight. Keep out of reach of children.

Formulations

• Enteric-coated tablets
• Capsules
• Powder for reconstitution