Gelusil® is the #1 rescue treatment for immediate heartburn relief.*

If you experience heartburn or acid indigestion between doses of Nexium®, Prevacid®, Prilosec OTC®, or another 24-hour medication, you're not alone. Nearly 1 in 2 people on a PPI acid reducer need a rescue heartburn treatment.1

For more than 70 years, Gelusil® has provided fast relief when heartburn symptoms flare up. Its unique combination formula is different from other antacids. It contains aluminum hydroxide and magnesium hydroxide to relieve heartburn and acid indigestion, and it has not been associated with acid rebound. Another active ingredient in Gelusil® is simethicone, which relieves bloating and gas.

Gelusil® is strong enough for occasional, everyday heartburn relief — including nighttime heartburn. And it's safe enough to take with 24-hour heartburn medications — like Nexium®, Prevacid®, and Prilosec OTC® — if symptoms flare up between doses.

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Gelusil® is the #1 brand used in clinical studies in patients who experienced heartburn after taking a PPI acid reducer.*

In a review of PPI acid reducer research studies that permitted the use of a traditional antacid for breakthrough heartburn, Gelusil® was used most often. In fact, Gelusil® was used more than all other antacid brands combined.1

Since Gelusil® was used most often in PPI acid reducer clinical trials for breakthrough heartburn relief, that's good news if you take Nexium®, Prevacid®, Prilosec OTC®, or another PPI acid reducer. Take Gelusil® when heartburn symptoms occur between doses of your 24-hour heartburn medication.

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Gelusil® tablets come in easy-to-open, easy-to-carry foil packs.


Gelusil® chewable tablets come in convenient foil packs. They're the perfect size for pockets, purses, briefcases, desk drawers, nightstands, and just about anywhere you might need relief. Take them to work, to dinner, on vacation, and other places. With Gelusil®, you can be prepared whenever you need relief.

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Find Gelusil® at your local store

  • CVS
  • amazon

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Gelusil® Antacid & Anti-Gas Tablets

Product Information

Active ingredients (in each tablet): Purpose:
Aluminum hydroxide dried gel 200 mg Antacid
Magnesium hydroxide 200 mg Antacid
Simethicone 25 mg Anti-gas



  • Heartburn
  • Sour stomach
  • Acid indigestion
  • Bloating, pressure, and discomfort commonly referred to as gas


  • Ask a doctor before use if you have kidney disease or are on a magnesium-restricted diet.
  • Ask a doctor or pharmacist before use if you are now taking a prescription drug. Antacids may interact with certain prescription drugs.
  • Stop use and ask a doctor if symptoms last for more than 2 weeks.
  • Keep this and all drugs out of the reach of children. If pregnant or breast-feeding, ask a health professional before use.


  • Chew 2 to 4 tablets. Repeat hourly if symptoms return, or as directed by a physician.
  • Do not take more than 12 tablets in a 24-hour period, or use the maximum dosage for more than 2 weeks, except under the advice and supervision of a physician.
  • Children under 12 years of age: ask a doctor


  • Each tablet contains: magnesium 95 mg
  • Store at 59° to 77°F (15° to 25°C)
  • Tamper Evident: Do not use if blister or printed Gelusil® foil seal is broken
  • See end panel for lot number and expiration date

Inactive Ingredients

  • Dextrose, flavors, magnesium stearate, maltodextrin, silica, sucralose

Available in

  • 100-count chewable tablets
  • Easy open foil packs
  • Cool Mint flavor

Questions? Contact us.

Download the Gelusil® Product Fact Sheet (PDF)

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  1. Jacobson BC, Ferris TG, Shea TL, Mahlis EM, Lee TH, Wang TC. Who is using chronic acid suppression therapy and why? Am J Gastroenterol. 2003;98(1):51-58.
  2. Mosby's Medical Dictionary. 8th ed. Maryland Heights, MO. Elsevier Health Sciences. 2009.

Nexium®, Prilosec OTC®, and Prevacid® registered trademarks are property of their respective owners.