Here’s the short, honest answer most comparison pages dance around: in their classic liquid form, Maalox and Mylanta are almost the same drug. Both are built on aluminum hydroxide and magnesium hydroxide to neutralize stomach acid, both add simethicone for gas, and if you swapped one for the other you’d struggle to tell the difference. Choosing between them is closer to picking between two supermarket brands of the same product than picking between two different medicines.
Where a real difference shows up is within each brand — the specific product line you grab off the shelf, whether it uses calcium carbonate instead of the aluminum-magnesium formula, and the strength. And there’s a much bigger difference lurking behind both of them: neither one does the thing that actually helps throat-based silent reflux. That’s the part worth your attention.
Key Takeaways
- Classic Maalox and classic Mylanta liquids have essentially the same formula: aluminum hydroxide, magnesium hydroxide and simethicone.
- For ordinary heartburn, they work the same way, at the same speed, with the same side effects — the choice is basically brand preference.
- The real differences are between product lines, not brands: some Maalox and Mylanta products use calcium carbonate instead, and strengths vary.
- Neither forms an alginate raft, which is why both do little for silent reflux (LPR) — a raft-forming product like Gaviscon Advance is a better fit there.
- Pepto-Bismol is not in the same category — it’s bismuth subsalicylate, an aspirin relative, aimed more at upset stomach and diarrhea than acid.
- Both are for occasional relief only, not daily long-term control.
Is Mylanta the Same as Maalox?
For the classic liquid antacids, yes — near enough that it doesn’t matter. Both combine two acid-neutralizing salts, aluminum hydroxide and magnesium hydroxide, with simethicone to break up gas bubbles. That combination is the workhorse liquid-antacid formula, and both brands are built on it.
The two minerals are paired deliberately in both products. Aluminum hydroxide tends to constipate, magnesium hydroxide tends to loosen, and together they roughly balance each other out while still neutralizing acid effectively. It’s the same logic in both bottles because it’s simply good antacid design. Everything I’ve written about how Maalox works — the fast-but-brief relief, the dosing, the side effects — applies almost identically to Mylanta.
Where the Real Differences Are
If the classic formulas are the same, why do people insist there’s a difference? Because both brands sell a range of products, and those vary:
- Calcium carbonate versions. This is the big one. Some products under both brands use calcium carbonate rather than the aluminum-magnesium formula — for example, calcium-carbonate-based Mylanta and Maalox chewables. Calcium carbonate is a different antacid (the same active as Tums) with a different feel and bowel profile. So “Maalox vs Mylanta” can occasionally mean comparing two different antacid chemistries, depending on which product you’re holding.
- Strength. Regular versus maximum-strength versions contain different amounts of the same actives.
- Simethicone content. Both include it, but the exact amount varies by product, which matters if gas and bloating are your main complaint.
- Flavor and format. Liquid versus chewable, and different flavors — genuinely just preference.
The practical rule: ignore the brand on the front and read the active-ingredient panel on the back. That tells you whether you’re getting an aluminum-magnesium antacid, a calcium carbonate one, or something with more or less simethicone — which is what actually determines how it behaves.
Can You Take Maalox and Mylanta Together?
There’s no point. Because they’re essentially the same drug, taking both is just taking a double dose of one antacid — you’d be doubling up on the same aluminum and magnesium, with the extra bowel effects that brings and no extra benefit. Pick one. If a single antacid isn’t controlling your symptoms, the answer isn’t a second antacid on top; it’s a different kind of treatment.
Mylanta or Gaviscon? This Is the Difference That Matters
This is where the comparison gets genuinely useful, because Maalox and Mylanta share a limitation that a different product doesn’t have.
Maalox and Mylanta are neutralizers. They raise the pH of acid that’s already in your stomach, briefly. What neither of them does is form a physical barrier against reflux. Gaviscon Advance does exactly that: it contains an alginate that reacts with stomach acid to form a gel “raft” floating on top of the stomach contents, physically blocking reflux from travelling up the esophagus.
That mechanical barrier is a real advantage. A systematic review and meta-analysis found alginate therapy significantly more effective than antacids or placebo at controlling reflux symptoms [Leiman et al., Diseases of the Esophagus, 2017]. The full picture is in my breakdown of how raft-forming products compare, and Tums versus Gaviscon covers neutralizing versus rafting head to head.
It matters most for silent reflux (LPR), where refluxed material reaches the throat and voice box. In LPR the damage is driven largely by pepsin reaching the larynx, and neutralizing acid down in the stomach does little to stop the reflux event itself climbing to your throat. A raft can block that journey; an antacid can’t. So if your symptoms are throat-based — hoarseness, throat clearing, a lump sensation — neither Maalox nor Mylanta is the right choice, and that’s not a knock on either brand, just the wrong tool for that job.
Pepto vs Mylanta (and Maalox vs Pepto)
People often line Pepto-Bismol up against Mylanta or Maalox, but they’re not really the same category. Pepto-Bismol is bismuth subsalicylate — a chemical relative of aspirin — and it’s aimed more at upset stomach, nausea and diarrhea than at pure acid reflux. Because it’s a salicylate, it carries bleeding risks for some people and isn’t recommended for anyone who should avoid aspirin.
So for straightforward heartburn or acid indigestion, a neutralizing antacid like Mylanta or Maalox is the more logical pick. For an upset, queasy stomach with loose bowels, Pepto-Bismol is a different tool for a different problem. Choosing between them is really about which symptom you’re treating, not which is “stronger.”
So Which Should You Choose?
For an occasional bout of heartburn or indigestion with a bit of gas, Maalox and Mylanta are interchangeable — buy whichever is cheaper or tastes better to you, and read the label to make sure you’re getting the aluminum-magnesium-simethicone formula rather than a calcium carbonate variant if that’s what you want. Neither is meaningfully better than the other.
But if you’re standing in the pharmacy comparing these two because heartburn keeps coming back, that’s the signal to step up a level. An antacid — either brand — treats the moment, not the pattern. For frequent reflux, and especially for anything reaching the throat, an alginate or a proper dietary approach will do far more than choosing between two near-identical antacids. My guide to the best over-the-counter medicine for acid reflux maps out the full ladder.
Conclusion
Maalox versus Mylanta is one of those comparisons where the honest answer is “there’s barely a difference.” In their classic liquid form they’re the same antacid formula — aluminum and magnesium hydroxide plus simethicone — working the same way at the same speed. The only real variation is within each brand’s range: calcium carbonate versions, different strengths, different amounts of anti-gas simethicone. Read the back of the box and you’ll know exactly what you’re getting from either.
The more important point is what both share: neither reduces how often you reflux, and neither forms a barrier against reflux reaching your throat. If you’re choosing between them repeatedly, the tool doesn’t match the problem. That gap is what the Wipeout Diet Plan is built to close — a mechanism-first approach to meal size, timing, fat load and trigger foods that cuts the number and force of reflux events, so you’re not reaching for any antacid several times a day. I designed it first around LPR and silent reflux, the throat-based form where antacids help least, but because it works on the same underlying mechanisms it helps classic GERD and everyday heartburn just as well. And if you want a concrete starting point, the Wipeout Food Reference Guide is the essential companion — every food and drink that’s safe for acid reflux and LPR with its actual pH value, so you’re working from numbers instead of guesswork.
Pick whichever antacid you like for the occasional flare. Then deal with why the flares keep happening.
Frequently Asked Questions
Is Mylanta the same as Maalox?
In their classic liquid form, essentially yes. Both contain aluminum hydroxide, magnesium hydroxide and simethicone, work the same way, and have the same speed and side-effect profile. The choice between them is mostly brand preference.
Is Maalox or Mylanta stronger?
Neither is inherently stronger — it depends on the specific product. Each brand sells regular and maximum-strength versions with different amounts of the same active ingredients, so compare the actual milligrams on the label rather than the brand name.
Can I take Maalox and Mylanta together?
There’s no reason to. They’re essentially the same drug, so taking both just means a double dose of one antacid, with more bowel side effects and no added benefit. Use one or the other.
Is Pepto-Bismol the same as Mylanta?
No. Pepto-Bismol is bismuth subsalicylate, an aspirin relative aimed at upset stomach, nausea and diarrhea. Mylanta is an aluminum-magnesium antacid for heartburn and acid indigestion. They treat different problems and carry different risks.
Which is better for silent reflux, Maalox or Mylanta?
Neither is well suited to silent reflux (LPR). Both neutralize stomach acid but do nothing to stop reflux reaching the throat, where pepsin drives the damage. A raft-forming alginate like Gaviscon Advance, or a dietary approach that reduces reflux events, is far more useful for throat symptoms.
Research & References
- Review of the clinical pharmacology of antacids, covering how aluminum- and magnesium-based antacids neutralize acid and why the two are paired to balance bowel effects [Maton and Burton, Drugs, 1999].
- Systematic review and meta-analysis finding alginate therapy significantly more effective than antacids or placebo for controlling gastroesophageal reflux symptoms [Leiman et al., Diseases of the Esophagus, 2017].
David Gray
12 years living with LPR · Consultant & researcher
I've lived with LPR for twelve years — the misdiagnoses, the PPI courses that did nothing, the slow work of figuring out what actually helps. Wipeout Reflux is where I translate the research into plain terms for people stuck in the same place. Every claim here is sourced to peer-reviewed work, and I consult one-to-one with LPR sufferers.