Lubiprostone Shortage Update: What Patients Need to Know in 2026

If you rely on Lubiprostone (Amitiza) for chronic idiopathic constipation, IBS-C, or opioid-induced constipation, you may have noticed it getting harder to find at your local pharmacy. This article gives you the clearest, most up-to-date picture of Lubiprostone availability in 2026 — what's actually happening, whether there's an official shortage, and the most important steps you can take to protect your medication supply.

Is There an Official Lubiprostone Shortage in 2026?

As of early 2026, Lubiprostone (including brand Amitiza) is not listed on the FDA's official drug shortage database. The FDA defines a drug shortage as a period when the supply of a drug is inadequate to meet patient demand. By that formal definition, there is no national shortage.

However — and this is important — the absence of an FDA-listed shortage does not mean the drug is easy to find. Patients across the country continue to report difficulty filling Lubiprostone prescriptions, particularly at large chain pharmacies. The problem is localized and inconsistent, but very real for those experiencing it.

What's Causing the Lubiprostone Availability Problem?

Several overlapping factors explain why Lubiprostone is harder to find than it should be:

• Recent patent expiration: Amitiza's patents expired around 2024–2025. The brand-to-generic transition period is often unstable — pharmacies shift their purchasing patterns while the generic supply chain is still maturing.
• Few generic manufacturers: Only a small number of companies currently make generic Lubiprostone. Any manufacturing or supply chain disruption at one of these companies can ripple across the entire market.
• Demand-based stocking at chain pharmacies: Large pharmacies like CVS and Walgreens order medications based on local prescription volume. If a location doesn't fill many Lubiprostone prescriptions, it may not stock it at all.
• Insurance barriers adding stress: Prior authorization and step therapy requirements can delay access even when the drug IS available. This makes the problem feel worse than a simple stock issue.

How Does This Compare to the Past?

When Amitiza was still under patent and only available as a brand-name drug (before 2024–2025), it was more consistently stocked at pharmacies — partly because it was one of the few options in its class and prescribers were loyal to the brand. Now that the generic market is opening up but still fragmented, the transition is creating supply unpredictability that wasn't present before.

What Can Patients Do Right Now?

Here are the most effective steps to protect your Lubiprostone supply in 2026:

1. Refill early. Don't wait until you have 2 or 3 pills left. Start the search process when you have at least a week's supply remaining.
2. Ask for a 90-day supply. When you do find it, ask your doctor to prescribe 90 days at a time. Many insurance plans and mail-order pharmacies support this and it reduces how often you need to search.
3. Use medfinder. medfinder calls pharmacies near you to check which ones have Lubiprostone in stock — saving you hours of phone calls.
4. Try independent pharmacies. Independent pharmacies often have more sourcing flexibility than chains and may be able to get your medication when others can't.
5. Consider mail-order pharmacy. Mail-order pharmacies often have more reliable inventory and ship 90-day supplies directly to your door.
6. Have a backup plan. Talk to your doctor about a backup medication in case Lubiprostone becomes unavailable for an extended period. Knowing your alternatives ahead of time reduces stress.

What About Brand Amitiza vs. Generic Lubiprostone?

Both the brand (Amitiza) and generic (Lubiprostone) are FDA-approved and therapeutically equivalent. If one is available but the other isn't, switching between them is generally safe — but always confirm with your pharmacist. Some insurance plans may now prefer or only cover the generic, so check your plan's formulary.

The Bottom Line

There is no official FDA shortage of Lubiprostone in 2026, but that doesn't mean it's always easy to find. Supply is fragmented and inconsistent across pharmacies. Planning ahead and knowing your options is the best defense. Check our guide on how to find Lubiprostone near you or learn about alternatives to Lubiprostone if you need them.