The fastest way to stop heartburn is to take a liquid antacid containing aluminum/magnesium hydroxide, which begins neutralizing stomach acid within minutes and lasts about 80 minutes in the esophagus. But if you don’t have antacids on hand, several household strategies can cut the burn surprisingly quickly. Here’s what works, how fast it works, and what to reach for first.
Liquid Antacids Work Fastest
Not all over-the-counter antacids are created equal. In a head-to-head study published in the American Journal of Therapeutics, liquid aluminum/magnesium hydroxide formulations (the active ingredients in products like Maalox and Mylanta) had a faster onset than calcium carbonate tablets (Tums, Rolaids) in the majority of subjects tested. The liquid version also lasted longer: about 82 minutes of relief in the esophagus compared to 60 minutes for calcium carbonate.
The reason is straightforward. Liquid coats the esophagus on the way down, so it starts neutralizing acid on contact. Chewable tablets need to be broken down first. If speed is your priority, a liquid antacid is the better pick. Calcium carbonate tablets still work well and are easier to carry, so they’re a solid backup when you’re not at home.
Alginate Products: A Physical Barrier
Alginate-based products (like Gaviscon) take a different approach. Instead of just neutralizing acid chemically, they form a floating gel “raft” on top of your stomach contents. This raft acts as a physical barrier that blocks acid from splashing up into your esophagus. Carbon dioxide from bicarbonate gets trapped inside the gel, which keeps it buoyant.
Relief is rapid, comparable to standard antacids, but the protection tends to last longer because the barrier stays in place even as stomach acid continues to be produced. This makes alginate products especially useful if your heartburn hits after meals or when you lie down, since those are the moments acid is most likely to creep upward.
Baking Soda: The Kitchen Cabinet Fix
Plain baking soda (sodium bicarbonate) is a legitimate antacid that you probably already own. It neutralizes hydrochloric acid in seconds. The standard dose for adults is half a teaspoon dissolved in a full glass of cold water. You can repeat this every two hours if needed, but don’t exceed five teaspoons in a single day.
There are real limits to this remedy, though. Baking soda is extremely high in sodium, so it’s a poor choice if you have high blood pressure, heart disease, kidney disease, or any condition where your doctor has told you to limit salt. It can also cause the body to retain water, worsening swelling in the feet or legs. Don’t use it for more than two weeks straight. If you’re reaching for the baking soda box regularly, that’s a sign something deeper is going on with your digestion.
Chew a Piece of Gum
This one sounds too simple, but it has real science behind it. Chewing gum stimulates saliva production, and saliva is naturally slightly alkaline. Research published in the Annals of Otology, Rhinology & Laryngology found that gum chewing consistently raises pH levels in both the esophagus and the throat, meaning it makes those areas less acidic. Bicarbonate gum produced even greater increases than regular gum, but any sugar-free variety will help.
Chewing gum won’t knock out severe heartburn the way an antacid will, but it’s a useful tool when you’re caught without medication, or as an add-on after a big meal. Aim for at least 20 to 30 minutes of chewing to get the full benefit.
Body Position and Clothing Changes
Two physical adjustments can bring noticeable relief within minutes. First, if you’re lying down, sit up or stand. Gravity is your best friend when acid is creeping into your esophagus. If heartburn is hitting at night, elevate the head of your bed by about six inches or prop yourself up with a wedge pillow. Simply stacking regular pillows tends to bend you at the waist, which can make things worse.
Second, loosen your belt, unbutton your pants, or change out of anything tight around your midsection. Tight clothing compresses your stomach and the muscular valve at the top of it (the lower esophageal sphincter). That compression weakens the valve’s ability to keep acid where it belongs. Loosening the pressure lets the valve close properly again. This is especially relevant after a large meal, when your stomach is already expanded.
What to Avoid in the Moment
When heartburn is active, certain things will reliably make it worse. Lying flat, bending over, eating more food, drinking carbonated beverages, or having alcohol, coffee, or citrus will all increase acid production or relax the esophageal valve. Smoking has the same valve-relaxing effect. If you’ve just eaten, resist the urge to go straight to bed. Staying upright for at least two to three hours after eating gives your stomach time to empty and reduces the chance of reflux.
Acid Suppressants: Not Fast, but Longer Lasting
You may have heard of H2 blockers (like famotidine) or proton pump inhibitors, often called PPIs (like omeprazole). These are different from antacids because they reduce acid production rather than neutralizing acid that’s already there. That means they take longer to kick in, typically 30 minutes to an hour for H2 blockers and one to four days for PPIs to reach full effect. They’re not the right tool for stopping heartburn that’s happening right now.
Where acid suppressants shine is prevention. If you get heartburn frequently, taking an H2 blocker before a meal you know will trigger it can head off the problem entirely. PPIs are designed for people dealing with heartburn on most days. The FDA recommends limiting over-the-counter PPI use to 14-day courses, no more than three times per year. If you find yourself needing them more often, it’s worth getting evaluated for gastroesophageal reflux disease (GERD).
Heartburn vs. Heart Attack
Heartburn and heart attacks can feel remarkably similar. Even experienced doctors sometimes can’t tell the difference based on symptoms alone. Typical heartburn is a burning sensation in the chest or upper abdomen that usually shows up after eating, gets worse when lying down, and improves with antacids. It may come with a sour taste or a small amount of liquid rising into the back of your throat.
A heart attack more commonly involves pressure, tightness, or a squeezing sensation in the chest that may radiate to the neck, jaw, or back. It can come with shortness of breath, cold sweat, sudden dizziness, or unusual fatigue. Women are more likely than men to experience the less obvious symptoms like jaw pain, nausea, or back pain without classic chest pressure. If you have persistent chest pain and aren’t sure it’s heartburn, especially if it comes with any of those additional symptoms, call 911. That’s not a situation where you want to guess wrong.