Why Is Aluminum Hydroxide/Magnesium Hydroxide So Hard to Find? [Explained for 2026]

You walked into your local pharmacy expecting to grab a bottle of Mylanta or pick up a generic aluminum hydroxide/magnesium hydroxide suspension — only to find an empty shelf. If this sounds familiar, you're not alone. While this OTC antacid is generally one of the most widely available medications in America, there are times and places where supply runs tight, leaving patients frustrated and without relief.

In this article, we'll break down exactly why aluminum hydroxide/magnesium hydroxide antacids can be hard to find, what affects their availability, and what your options are when your go-to product isn't on the shelf.

What Is Aluminum Hydroxide/Magnesium Hydroxide?

Aluminum hydroxide and magnesium hydroxide are two antacid ingredients that work together to neutralize stomach acid. They are the active ingredients in well-known brands like Mylanta Maximum Strength and historically in Maalox (the Maalox brand was discontinued in the U.S.). These antacids are used to relieve heartburn, acid indigestion, upset stomach, and symptoms related to peptic ulcers, gastritis, and esophagitis.

The combination works particularly well because the two ingredients complement each other. Aluminum hydroxide tends to cause constipation, while magnesium hydroxide can cause loose stools — together they tend to balance out, resulting in fewer GI side effects than either ingredient alone.

Is There Currently a Shortage of Aluminum Hydroxide/Magnesium Hydroxide?

As of 2026, there is no active FDA-declared shortage of aluminum hydroxide/magnesium hydroxide antacids. This is an over-the-counter product that is manufactured by numerous companies and is widely distributed. However, that doesn't mean you'll always find your preferred brand or formulation at every store you visit. Local stock issues, brand discontinuations, and supply chain hiccups can still make it temporarily difficult to find a specific product.

One notable change: the brand-name Maalox was discontinued in the U.S. market. While generics with the same active ingredients remain available, patients loyal to a specific brand may find themselves searching for alternatives or adjusting to a different product.

Why Do Antacid Shelves Go Empty?

Even without a declared shortage, there are several reasons why aluminum hydroxide/magnesium hydroxide products can be hard to find at any given time:

• Seasonal demand spikes: Holiday eating, flu season, and summer barbecue season can spike demand at local stores.
• Brand reformulations: Mylanta has gone through several reformulations over the years, and transitions between formulas can temporarily reduce availability.
• Brand discontinuations: When a major brand like Maalox exits the market, consumers flood remaining alternatives, temporarily depleting stock.
• Regional distributor issues: OTC products depend on regional distributors, and local disruptions can clear shelves quickly.
• Small pharmacy stocking gaps: Independent pharmacies and smaller chain locations may not always keep every antacid formulation in stock.

Does the Liquid vs. Tablet Formulation Matter for Availability?

Yes — formulation matters. Liquid suspensions of aluminum hydroxide/magnesium hydroxide (like Mylanta Maximum Strength) tend to be carried in fewer locations than tablet-form antacids like Tums. If you regularly need the suspension form, you may find that larger chain pharmacies and grocery store pharmacy sections carry it more reliably than smaller independent pharmacies or convenience stores.

Chewable tablet formulations of aluminum/magnesium antacids are somewhat more widely distributed and may be easier to locate at a broader range of retail locations.

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What Happens When You Can't Find This Antacid?

If you're unable to find aluminum hydroxide/magnesium hydroxide at your usual pharmacy, you have several options:

1. Try a different pharmacy — chain pharmacies like CVS, Walgreens, and Walmart tend to carry larger OTC selections than specialty or independent locations.
2. Check online retailers — Amazon and major pharmacy websites often carry both brand-name and store-brand formulations with fast delivery.
3. Ask the pharmacist about equivalent generics — a store-brand suspension with the same active ingredients (400mg aluminum hydroxide + 400mg magnesium hydroxide per 5mL) is therapeutically equivalent to name-brand Mylanta Maximum Strength.
4. Use medfinder — medfinder calls pharmacies near you to find which ones have the medication in stock, so you don't have to call around yourself.

How medfinder Can Help You Locate Antacids Near You

Even for OTC medications, tracking down the right formulation at the right pharmacy can take time. medfinder is a service that does the calling for you — they contact pharmacies near your location to find out which ones have your medication in stock, then text you the results. This works for OTC products as well as prescription medications.

Skip the calls, skip the stress.

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When Should You See a Doctor Instead of Reaching for an Antacid?

Antacids like aluminum hydroxide/magnesium hydroxide are meant for short-term, occasional use — no more than 2 weeks at a time without physician guidance. If your heartburn or indigestion is occurring more than 2-3 times per week, or if antacids aren't providing adequate relief, it may be time to talk to your doctor about stronger options like H2 blockers (famotidine/Pepcid) or proton pump inhibitors (omeprazole/Prilosec).

See a doctor right away if you experience black or tarry stools, difficulty swallowing, unexplained weight loss, or persistent vomiting — these can be signs of a more serious condition.

Related Resources

For tips on locating this antacid near you, read our guide on how to find aluminum hydroxide/magnesium hydroxide in stock. If you're looking for alternatives, check out our post on alternatives to aluminum hydroxide/magnesium hydroxide.