Best Antacids for Heartburn Relief 2026
The TUMS Extra Strength 750 Chewable Tablets 2-Pack ($20.38) is the best for most people — 192 tablets per 2-pack at lower cost per tablet, with assorted fruit flavors for daily compliance. For liquid relief that also helps nausea, the Pepto-Bismol Original Liquid 6-Pack ($28.54) is the top pick when heartburn is not the only symptom.
See Today’s Price →At a Glance
| # | Product | Award | Price | Our Score | |
|---|---|---|---|---|---|
| 1 |  TUMS Extra Strength 750 Chewable Tablet… |
Best Overall | $20 | 9.1 | Buy → |
| 2 |  TUMS Ultra 1000 Mint Size 72 Count 2-Pack |
Best Maximum Strength | $18 | 8.8 | Buy → |
| 3 |  Rolaids Ultra Strength Antacid Chewable… |
Best for Fast Relief | $18 | 8.7 | Buy → |
| 4 |  TUMS Chewable Antacid Tablets Extra Str… |
Best Large Count Value | $17 | 8.5 | Buy → |
| 5 |  Pepto-Bismol Original Liquid Digestive … |
Best Liquid Option | $28 | 8.3 | Buy → |
Antacids for Heartburn Relief Buying Guide
Photo by www.kaboompics.com / PexelsAntacids work by chemically neutralizing stomach acid — they don't suppress acid production the way H2 blockers (Pepcid) or PPIs (Prilosec) do. This makes antacids the fastest-acting OTC heartburn relief (effects in 2-5 minutes) but also the shortest-lasting (2-4 hours maximum). Understanding when to use an antacid versus an H2 blocker is as important as choosing the right antacid formulation.
How we picked these. We compared 5 OTC antacids across active ingredient type and neutralizing capacity (milliequivalents per tablet), onset speed, flavors, dose count per package, and the clinical evidence for each formulation. We cross-referenced guidance from the American College of Gastroenterology OTC treatment guidelines, pharmacist recommendations from ASHP, and real-world patient reviews. Products were selected to represent the most effective OTC antacid formulations at each price point and format.
Active Ingredients: What's Neutralizing Your Acid
TUMS uses calcium carbonate (CaCO3) — the highest neutralizing capacity per tablet of any OTC antacid. A single TUMS Extra Strength 750 tablet neutralizes approximately 15 milliequivalents (mEq) of acid. Rolaids uses a combination of calcium carbonate and magnesium hydroxide — the magnesium adds a stool-softening effect that can prevent calcium carbonate's constipating effect. Pepto-Bismol uses bismuth subsalicylate, which is a different mechanism — it forms a protective coating over the stomach lining rather than neutralizing acid, making it better for nausea and diarrhea alongside heartburn.
Chewable vs. Liquid: When to Use Each
Chewable tablets (TUMS, Rolaids) are more convenient and portable. The chewing process begins acid neutralization in the mouth and delivers the active ingredient to the stomach within 2-3 minutes. Liquid antacids (Pepto-Bismol) coat the esophagus as they flow down — providing faster relief for esophageal burning specifically (the "fire" feeling in the chest) compared to tablets that must dissolve in the stomach first. For heartburn with a burning throat sensation, liquid can feel faster.
Ultra Strength vs. Extra Strength
TUMS Extra Strength 750mg has 750mg of calcium carbonate per tablet. TUMS Ultra Strength 1000mg has 1000mg per tablet — 33% more neutralizing capacity in the same pill size. For occasional mild heartburn after a spicy meal, Extra Strength is appropriate. For frequent or severe acid reflux, Ultra Strength delivers more acid neutralization per dose. Note: the maximum daily dose of calcium carbonate is 7.5g — roughly 10 Extra Strength or 7.5 Ultra Strength tablets.
When to See a Doctor
Antacids are appropriate for occasional heartburn (1-2 times per week or less). Heartburn 3+ times per week for more than 2 weeks may indicate GERD requiring prescription treatment. Antacids should not be taken continuously for more than 2 weeks without medical evaluation — regular antacid use can mask more serious conditions including esophagitis or hiatal hernia.
Our Picks
TUMS Extra Strength 750 Chewable Tablets Assorted Fruit 96ct 2-Pack (Best Overall) — $20 See Price →
TUMS Ultra 1000 Mint Size 72 Count 2-Pack (Best Maximum Strength) — $18 See Price →
Rolaids Ultra Strength Antacid Chewable Tablets Mint 120 Count (Best for Fast Relief) — $18 See Price →
TUMS Chewable Antacid Tablets Extra Strength Assorted Fruit 330 Count (Best Large Count Value) — $17 See Price →
Pepto-Bismol Original Liquid Digestive Relief 4oz 6-Pack (Best Liquid Option) — $28 See Price →
Showing 5 of 5 products
“The best value antacid purchase — the 2-pack of the most recommended OTC heartburn tablet at a lower per-tablet cost.”
See Today’s Price →What we like
- 2-pack value (192 tablets)
- Extra Strength 750mg
- Assorted fruit flavors improve compliance
- Best per-tablet price
- #1 pharmacist-recommended brand
Watch out for
- Calcium carbonate can cause mild constipation with frequent use
- 2-pack requires storage space
“The strongest OTC antacid formulation — correct choice when Extra Strength doesn't provide enough relief.”
See Today’s Price →What we like
- 1000mg calcium carbonate (33% more than Extra Strength)
- 2-pack
- Mint flavor
- Maximum OTC acid neutralization per tablet
Watch out for
- Only mint flavor
- Slightly fewer tablets than Extra Strength 2-pack
- Calcium-constipation effect amplified at higher dose
“The best antacid for users who find TUMS causes constipation — the magnesium hydroxide combination balances the effect.”
See Today’s Price →What we like
- Calcium carbonate + magnesium hydroxide dual-action
- Magnesium offsets calcium constipation
- 120-count
- Trusted brand
- Consistent relief
Watch out for
- Mint only
- Higher per-tablet price than TUMS 2-pack
- Magnesium can cause loose stools with very frequent use
“The best cost-per-tablet option on the entire list — 330 tablets at $17.59 is under $0.06 per tablet.”
See Today’s Price →What we like
- 330 tablets (most on this list)
- Best per-tablet price
- Assorted fruit flavors
- Standard 750mg Extra Strength
- One large bottle convenience
Watch out for
- Single large bottle (runs out all at once)
- Large container less portable
- Same calcium constipation note as TUMS
“Best when heartburn is one of multiple GI symptoms — Pepto covers nausea and diarrhea that TUMS and Rolaids don't address.”
See Today’s Price →What we like
- 6-pack of 4oz bottles
- Liquid coats esophagus and stomach
- Multi-symptom (nausea, indigestion, diarrhea)
- Iconic brand
- Fast esophageal relief
Watch out for
- Most expensive per dose
- Pink liquid stains
- Bismuth turns stool/tongue black temporarily
- Different mechanism than acid-neutralizing antacids
How We Analyze Products
We analyze Amazon review data — often thousands of reviews per product — to surface patterns that individual buyers miss. Our process aggregates star ratings, review counts, and buyer sentiment at scale, identifying which strengths and weaknesses appear consistently across the largest review samples available. The 27,933+ reviews analyzed on this page represent real verified-purchase feedback from Amazon buyers.
Each product earned its placement through data: total review volume, average rating, and the specific praise and complaints that repeat most often across buyers. No manufacturer paid for placement on this page. Products appear here because buyers endorsed them at scale, not because a company asked us to feature them.
We use AI to summarize review sentiment — not to fabricate opinions, but to condense what thousands of buyers actually wrote into a readable format. The pros and cons you see reflect the most common themes found in verified purchaser reviews, paraphrased for clarity. We do not claim to have accessed Reddit, YouTube, or specific publications in generating these summaries.
Prices shown reflect Amazon pricing at the time this page was last generated. Click “See Today’s Price” to get the current live price on Amazon. Read our full methodology →