Why Is Mexiletine So Hard to Find? [Explained for 2026]

If you've been prescribed mexiletine and are struggling to find it at your local pharmacy, you're not alone. Despite being a mature generic drug that has been available for decades, mexiletine can be surprisingly difficult to track down at certain pharmacies — especially outside of major metropolitan areas. This guide breaks down exactly why that happens and what you can do about it.

What Is Mexiletine and Who Uses It?

Mexiletine (brand name: Mexitil, now discontinued) is a Class 1B antiarrhythmic medication used primarily to treat serious ventricular arrhythmias — abnormal heart rhythms originating in the lower chambers of the heart. It works by blocking sodium channels in heart cells, which helps stabilize the electrical activity that controls heart rhythm.

Beyond arrhythmias, mexiletine is also used off-label for diabetic neuropathy, myotonic dystrophy, and long QT syndrome type 3. This broader use means a wider — but still relatively small — population of patients depends on it regularly.

Has Mexiletine Been in Shortage Before?

Yes. In 2020, Teva Pharmaceuticals — one of the primary manufacturers of generic mexiletine — experienced a shortage due to a delay in obtaining the active pharmaceutical ingredient (API). The shortage was officially resolved by April 2021 when alternative supply from Lannett and other manufacturers filled the gap. As of 2026, there is no active FDA-tracked shortage of mexiletine.

However, "no active shortage" does not mean "available everywhere." Pharmacies stock medications based on local demand, and a drug prescribed mainly by cardiologists and electrophysiologists may simply not be stocked at every neighborhood pharmacy.

Why Is Mexiletine Still Hard to Find at Some Pharmacies?

There are several reasons you might encounter an empty shelf for mexiletine even when no official shortage exists:

Low prescription volume. Mexiletine is a niche cardiac drug. Small pharmacies may stock only a few bottles per month and may run out between orders.

Multiple generic manufacturers. Your pharmacy may carry one manufacturer's version (e.g., Teva or Lannett) but not others. If that manufacturer has a supply hiccup, the shelf goes empty.

API supply chain complexity. Like many generics, mexiletine's active ingredient is often sourced overseas. Any disruption in the API supply chain can cause ripple effects to retail availability.

Demand spikes. New prescribing guidelines, media coverage of arrhythmia treatments, or off-label use expansion can cause temporary demand spikes that outpace local stock.

Specific capsule strength unavailability. Mexiletine comes in 150 mg, 200 mg, and 250 mg capsules. Your pharmacy may have one strength in stock but not the one you were prescribed.

Is the Mexiletine Brand Mexitil Still Available?

No. Mexitil — the original brand-name version of mexiletine — was voluntarily discontinued by Boehringer Ingelheim years ago. It is no longer commercially available in the United States. Today, mexiletine is sold exclusively as a generic. This is actually good news for patients in terms of cost, but it means there is no brand manufacturer running a patient assistance or copay savings program.

What Strengths of Mexiletine Are Available?

Mexiletine hydrochloride capsules are available in three strengths:

150 mg capsules

200 mg capsules

250 mg capsules

Multiple generic manufacturers supply these, including Teva and Lannett. If your pharmacy can't stock one manufacturer's version, they may be able to order from another. It's worth asking.

What Should You Do If Your Pharmacy Doesn't Have Mexiletine?

Don't panic — and don't just give up. Here are your next steps:

Call multiple pharmacies. Don't rely on a single pharmacy. Call 5-10 pharmacies in your area to compare. Chain pharmacies, independent pharmacies, and grocery-store pharmacies often carry different stock.

Ask about ordering. If a pharmacy doesn't have it in stock, ask if they can order it. Many pharmacies can get medications within 24-48 hours through their distributor.

Try a different pharmacy chain. CVS, Walgreens, Rite Aid, Walmart, and Costco pharmacies all have different ordering systems and different stock levels.

Use medfinder. [@portabletext/react] Unknown block type "span", specify a component for it in the `components.types` prop calls pharmacies near you to check which ones can fill your mexiletine prescription — saving you the time and frustration of calling around yourself.

Talk to your prescriber. If mexiletine is genuinely unavailable in your area, your cardiologist or electrophysiologist may be able to discuss alternative antiarrhythmic options. Never stop mexiletine without medical guidance — sudden discontinuation can worsen arrhythmias.

What About Mail-Order Pharmacies?

Mail-order pharmacies can be a reliable option for mexiletine because they typically maintain larger inventory levels than retail locations. If you take mexiletine long-term for a chronic condition like an arrhythmia, setting up a 90-day mail-order supply through your insurance or a reputable mail-order pharmacy (such as Express Scripts or CVS Caremark) can help you avoid running out.

Why Mexiletine Availability Matters

Unlike many medications where missing a few doses is an inconvenience, mexiletine is often prescribed for life-threatening ventricular arrhythmias. Missing doses or abruptly stopping treatment can be dangerous. This makes finding a reliable, consistent supply critically important.

If you're having difficulty finding mexiletine, read our related guides on

how to find mexiletine in stock near you and alternatives to mexiletine if you can't fill your prescription.