Alternatives to Zenpep If You Can't Fill Your Prescription

Zenpep (pancrelipase) is a critical medication for people with exocrine pancreatic insufficiency (EPI). When your pharmacy can't fill your Zenpep prescription, you can't simply skip doses — every meal without enzyme replacement means malabsorption, pain, and nutritional risk. Fortunately, there are FDA-approved alternatives. This guide explains your options, how they compare, and what to discuss with your doctor.

The Most Important Rule: You Need a New Prescription

Before diving into alternatives, here's the single most important fact to know: the FDA has stated that pancreatic enzyme replacement therapies (PERTs) like Zenpep, Creon, Pancreaze, and Pertzye are not interchangeable. Your pharmacist cannot substitute one for another without a new prescription from your prescriber. If Zenpep is unavailable, you must contact your doctor to get a new script for an alternative product.

FDA-Approved Alternatives to Zenpep

There are four other FDA-approved pancrelipase products that your doctor may prescribe if Zenpep is unavailable:

1. Creon (pancrelipase)

Creon is the most widely prescribed PERT in the United States and is manufactured by AbbVie. Like Zenpep, it contains lipase, protease, and amylase derived from porcine pancreatic glands, formulated as enteric-coated microspheres in delayed-release capsules. Creon is approved for EPI due to cystic fibrosis, chronic pancreatitis, pancreatectomy, or other conditions.

Clinical studies have shown Creon and Zenpep to be non-inferior to each other in fat absorption. A crossover trial in cystic fibrosis patients found comparable results (84.1% vs 85.3% fat absorption). Creon is available in six strengths: 3,000 / 6,000 / 12,000 / 24,000 / 36,000 / 60,000 lipase units.

Key consideration: Because strengths differ from Zenpep, your doctor will need to calculate the equivalent dose. Do not assume that a 20,000-unit Zenpep dose equals a 20,000-unit Creon dose.

2. Pancreaze (pancrelipase)

Pancreaze contains pancrelipase in enteric-coated microtablets — a slightly different formulation than Zenpep's enteric-coated beads. It is FDA-approved for EPI due to cystic fibrosis and other conditions, and is approved for use in infants under 12 months. Pancreaze is available in multiple strengths, allowing for flexible dosing.

Key consideration: Like Zenpep, Pancreaze is a brand-only product with no generic. If Zenpep availability is the primary issue, verify that Pancreaze is in stock at your pharmacy before switching.

3. Pertzye (pancrelipase)

Pertzye is a unique PERT that uses bicarbonate-buffered enteric-coated microspheres. The bicarbonate buffer may help protect enzymes in patients whose small intestine has a lower-than-normal pH — a situation that can occur in some EPI patients. Pertzye is FDA-approved for EPI due to cystic fibrosis and other conditions and is available in several dose strengths.

Key consideration: Pertzye may be particularly useful for patients who haven't had optimal symptom control with other PERTs. Ask your gastroenterologist if Pertzye's bicarbonate formulation is a good fit for your condition.

4. Viokace (pancrelipase)

Viokace is the only non-enteric-coated pancrelipase product. Because it lacks enteric coating, it must be taken with a proton pump inhibitor (PPI) — such as omeprazole or pantoprazole — to protect the enzymes from stomach acid. Viokace is FDA-approved specifically for EPI due to chronic pancreatitis or pancreatectomy in adults only; it is not approved for cystic fibrosis.

Key consideration: Viokace is the most different from Zenpep in terms of administration. It is not appropriate as a drop-in replacement for most patients and requires close coordination with your prescriber.

Quick Comparison of Zenpep Alternatives

Here's a quick side-by-side summary:

• Creon: Enteric-coated microspheres | 6 strengths | CF, pancreatitis, pancreatectomy | Most widely available
• Pancreaze: Enteric-coated microtablets | Multiple strengths | CF and other conditions | Brand-only
• Pertzye: Bicarbonate-buffered microspheres | Several strengths | CF and other conditions | Useful for low GI pH
• Viokace: Non-enteric-coated tablet | 2 strengths | Adults only, pancreatitis/pancreatectomy | Must take with PPI

What About Over-the-Counter Digestive Enzymes?

Over-the-counter enzyme supplements sold at health food stores are not substitutes for prescription PERT products like Zenpep. These supplements contain far lower levels of lipase than prescription products, are not FDA-regulated for potency and efficacy, and are not appropriate for treating true exocrine pancreatic insufficiency. Do not attempt to replace your Zenpep with OTC supplements without explicit guidance from your doctor.

How to Talk to Your Doctor About Switching

When calling your prescriber about a Zenpep shortage, be prepared to provide:

• Your current Zenpep dose strength and how many capsules per meal
• How many days of medication you have left
• Which alternatives your nearby pharmacies have in stock (check before calling so your doctor can write the right script)
• Your underlying condition (cystic fibrosis, chronic pancreatitis, etc.) — this affects which alternatives are FDA-approved for you

The Bottom Line

If Zenpep is unavailable at your pharmacy, you have real options — but they all require a new prescription. Creon is typically the most accessible alternative, followed by Pancreaze and Pertzye. Never switch PERTs on your own or use OTC supplements as a substitute. If you're still searching for Zenpep itself, read our guide on how to find Zenpep in stock near you.