Pancreatic Enzyme Replacement Therapy (PERT) Guidelines

Introduction to PERT

• The American Gastroenterological Association recommends that pancreatic enzyme replacement therapy (PERT) should be administered at an initial dose of 40,000 USP units of lipase with each main meal and 20,000 USP units with snacks in adults, with dosage adjustments based on clinical response and meal fat content 1, 2

Diagnosis of Pancreatic Insufficiency

• Pancreatic insufficiency should be suspected in high-risk conditions including chronic pancreatitis, relapsing acute pancreatitis, pancreatic cancer, cystic fibrosis, and previous pancreatic surgery 2
• Clinical features include steatorrhea, weight loss, bloating, excessive flatulence, fat-soluble vitamin deficiencies, and protein-calorie malnutrition 2
• Fecal elastase test is the most appropriate initial diagnostic test, with levels <100 μg/g of stool providing good evidence of exocrine pancreatic insufficiency (EPI) 2, 3

Pancreatic Enzyme Replacement Therapy (PERT)

• Initial adult dosing: 40,000 USP units of lipase with each main meal and 20,000 USP units with snacks 1, 2
• PERT must be taken during the meal to maximize mixing and digestion of nutrients, not before or after 1, 4
• FDA-approved PERT formulations are derived from porcine sources and are equally effective at equivalent doses 2

FDA-Approved PERT Formulations

Optimizing PERT Effectiveness

• For inadequate response to initial PERT dosage, consider increasing PERT dosage, adding a proton pump inhibitor (PPI) or H2 receptor antagonist, or investigating for small intestinal bacterial overgrowth (SIBO) 1, 5, 6
• Non-enteric-coated PERT formulations require concurrent acid-suppression therapy with PPIs or H2 blockers 1, 4

Monitoring Treatment Response

• Assess for reduction in steatorrhea and associated gastrointestinal symptoms 1, 2
• Monitor for weight gain, improved muscle mass and function 1, 2
• Check fat-soluble vitamin levels (A, D, E, K) regularly 1, 2

Dietary Recommendations

• Recommend low-moderate fat diet with frequent smaller meals 1, 4
• Avoid very-low-fat diets as they may compromise essential fatty acid intake 1, 4
• Routine supplementation of fat-soluble vitamins is appropriate 1, 2

Common Pitfalls to Avoid

• Taking enzymes before or after meals instead of during meals 1, 4
• Using over-the-counter enzyme or ox bile supplements instead of FDA-approved PERT 1, 4
• Inadequate dosing or failing to adjust dosage based on meal fat content 1, 2
• Not considering acid suppression therapy when response to PERT is suboptimal 1, 5, 6
• Overlooking other causes of malabsorption such as SIBO when PERT appears ineffective 5, 6
• Relying solely on symptomatic improvement without objective monitoring of nutritional status 1, 2

Pancreatic Enzyme Replacement Therapy Administration and Monitoring

Administration Technique

• The American Academy of Pediatrics and Clinical Nutrition guidelines recommend never adding enzymes directly to the child's bottle or feeding tube formula, and instead, administer enzymes during the meal to maximize mixing with food 7, 8
• Crushing or chewing enteric-coated microspheres should be avoided as it destroys acid protection, according to Clinical Nutrition guidelines 7, 8

Monitoring and Dose Titration

• The Clinical Nutrition society recommends monitoring growth parameters, such as weight and height, at every clinic visit to assess treatment adequacy 7, 8