About EPI

Insufficient PERT dosing can cause some patients with EPI to fall through the cracks

Looking for information about EPI in patients with CF?

CF=cystic fibrosis; EPI=exocrine pancreatic insufficiency; PERT=pancreatic enzyme replacement therapy.

Limitations of PERT can cause patients like
Grace to fall through the cracks

Grace

Meet Grace, 42

  • Started experiencing gastrointestinal symptoms 3 years ago
  • Made changes to her diet but symptoms persisted
  • Diagnosed by her primary care physician with irritable bowel syndrome with diarrhea (IBS-D) and prescribed an anti-diarrheal

Not an actual patient.

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480,000 to 960,000 lipase units may seem high, but that's what a healthy pancreas produces each meal1*

*The estimated "normal" amount of pancreatic enzyme secretion 4 hours after a meal varies with content and volume of meal ingested. Data estimated from a study using test meals of 300 to 600 kcal.

Video Thumbnail

See what it looks like when a pancreas is functioning properly, and when it's not, for patients with EPI who need ZENPEP.

Watch the video
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1 in 4 patients with EPI was originally diagnosed with another GI condition2†

In a survey of 500 clinicians and 1,001 adult patients with chronic GI issues.

GI symptoms could indicate EPI,
another disorder, or both3-13

Symptoms Comparison Table

If a patient presents with any of these
symptoms, especially if they get worse after a
fatty meal, it could be EPI14


This chart is for informational purposes only. It is not a complete list of symptoms for each disorder and is not intended to be used to diagnose, treat, or care for any particular patient.
GI=gastrointestinal.

Grace

6 months later:

  • Grace’s symptoms remained, and she was referred to a gastroenterologist
  • She was diagnosed with EPI and chronic pancreatitis 

Not an actual patient.

Patients with the following underlying conditions
may also have EPI15,16

Other common comorbidities:
  • IBS-D17
  • Crohn's disease18
  • Ulcerative colitis18
  • Celiac disease (with current or persistent diarrhea)19,20
Grace

Surgery for pancreatic neoplasms. The Whipple procedure is associated with the highest rate of EPI (up to 98%), while pylorus-preserving intervention has a slightly lower rate (80%-90%).

Grace

Grace’s doctor advised her to change her diet and stop smoking

Not an actual patient.

References: 1. ZENPEP. Package insert. Aimmune Therapeutics, Inc. Bridgewater, NJ; July 2025. 2. Fryar CD, Carroll MD, Gu Q, Afful J, Ogden CL. Anthropometric reference data for children and adults: United States, 2015–2018. Vital Health Stat. 2021;3(46):1-44. 3. Gardner TB, Adler DG, Forsmark CE, Sauer BG, Taylor JR, Whitcomb DC. ACG Clinical Guideline: chronic pancreatitis. Am J Gastroenterol. 2020;115(3):322-339. doi:10.14309/ajg.0000000000000535