The fastest way to get rid of heartburn is to take a liquid or chewable antacid containing calcium carbonate, which neutralizes stomach acid in minutes. If you don’t have antacids on hand, a half teaspoon of baking soda dissolved in a glass of cold water works as a quick substitute. Beyond those two options, several body positioning tricks and habits can ease the burn within minutes while you wait for relief to kick in.
Antacids Work Fastest Among OTC Options
Chewable or liquid antacids (the calcium carbonate tablets you’ll find in any drugstore) are the quickest over-the-counter fix. They neutralize acid directly on contact, so most people feel relief within a few minutes of taking them. The trade-off is that the effect doesn’t last long, typically one to two hours.
H2 blockers like famotidine take about an hour to start working but suppress acid production for a longer stretch. Proton pump inhibitors like omeprazole can take one to four days to reach full effect, so they’re not useful for the episode you’re having right now. If you’re reaching for something in the medicine cabinet mid-flare, antacids are the right call. Save the other options for preventing future episodes.
Alginate-based products are another option worth knowing about. When alginates mix with stomach acid, they form a gel-like raft that floats on top of your stomach contents and physically blocks acid from splashing up into your esophagus. They begin working right away and can be taken with a meal or immediately after. You’ll find them in products that combine alginate with antacids, giving you both chemical neutralization and a physical barrier.
The Baking Soda Shortcut
If you don’t have antacids at home, plain baking soda (sodium bicarbonate) is a legitimate antacid. Dissolve half a teaspoon in a full glass of cold water and drink it. It neutralizes acid quickly because sodium bicarbonate is a base that reacts directly with hydrochloric acid in your stomach.
There are limits, though. Don’t exceed five teaspoons in a day, and don’t use it as a regular remedy. Sodium bicarbonate causes your body to retain water, which can worsen high blood pressure. It’s also high in sodium, so it’s a poor choice for anyone watching their salt intake. Think of it as a one-off fix when you’re caught without proper antacids, not a go-to strategy.
Change Your Position Immediately
What you do with your body in the next few minutes matters. If you’re lying down, sit up or stand. Gravity is the simplest tool you have: when you’re upright, acid stays in your stomach instead of pooling against the valve at the top.
If heartburn is hitting at bedtime, lie on your left side. Your stomach sits slightly to the left of your esophagus, so in this position the junction between the two sits above the level of stomach acid. On your right side, that junction is essentially submerged. Research from Amsterdam UMC confirmed that left-side sleeping measurably reduces acid reflux for this anatomical reason. Elevating the head of your bed by four to six inches (using a wedge pillow or blocks under the bed frame) adds an extra layer of gravity-assisted protection.
Loosen Your Clothes
This one sounds trivial, but tight waistbands directly increase the pressure inside your abdomen. That upward pressure pushes stomach contents against the valve at the base of your esophagus, and a 2017 study published in Gastroenterology found that abdominal compression from a waist belt aggravates reflux primarily by impairing the esophagus’s ability to clear acid back down. If you’re wearing a snug belt, high-waisted jeans, or shapewear, loosening or removing them can provide noticeable relief surprisingly fast.
Chew a Piece of Gum
Chewing sugar-free gum after a meal roughly doubles your saliva production. Saliva is mildly alkaline, and all that extra fluid gets swallowed and washes acid back down out of your esophagus. In a study from the University of Dundee, gum chewing cut esophageal acid clearance time from about seven minutes to just over two minutes. That’s a meaningful difference when you’re in discomfort. Any sugar-free gum works. Mint flavors may bother some people with reflux, so a fruit flavor is a safer bet.
Sip Water, But Don’t Overdo It
A few sips of water can help rinse acid out of your esophagus and dilute what’s sitting in your stomach. You don’t need to chug a full glass, and drinking too much at once can actually increase stomach volume and make things worse. Small, steady sips are more effective.
Alkaline water with a pH around 8.8 has been shown to help neutralize pepsin, the digestive enzyme that damages esophageal tissue during reflux episodes. Ordinary tap water (pH around 7) still helps with the rinsing effect, but if you happen to have alkaline water available, it offers a slight extra benefit.
What Not to Do While You’re Waiting
Avoid lying flat, bending over, or doing anything that compresses your abdomen (like crunches or heavy lifting). Don’t eat more food on top of the episode, even if you think something bland might help. Milk, often suggested as a folk remedy, can briefly coat the esophagus but stimulates more acid production shortly after, often making the rebound worse.
Skip alcohol, coffee, carbonated drinks, citrus, and tomato-based foods until the episode passes. These either relax the valve between your stomach and esophagus or directly irritate tissue that’s already inflamed. Smoking has the same valve-relaxing effect, so lighting up during an episode will prolong it.
When Heartburn Might Be Something Else
Heartburn and heart attacks can feel remarkably similar. Even experienced doctors sometimes can’t tell them apart based on symptoms alone. Typical heartburn burns in the chest, gets worse after eating or lying down, comes with a sour taste in the mouth, and responds to antacids. A heart attack is more likely to involve pressure or squeezing that spreads to the neck, jaw, or arms, along with shortness of breath, cold sweat, lightheadedness, or sudden fatigue.
If you have persistent chest pain and aren’t sure it’s heartburn, especially if it came on during physical exertion, if you’re short of breath, or if you feel dizzy and nauseous at the same time, call 911. The overlap between the two is real enough that erring on the side of caution is always the right move.
Preventing the Next Episode
Fast relief solves the immediate problem, but if heartburn keeps coming back, the pattern matters more than the remedy. Eating smaller meals, finishing dinner at least two to three hours before bed, and avoiding your personal trigger foods (common ones include fried food, chocolate, alcohol, and spicy dishes) will reduce how often you need to reach for the antacids in the first place. Excess weight around the midsection increases abdominal pressure the same way a tight belt does, so even modest weight loss can reduce reflux frequency.
If you’re using antacids more than twice a week, that’s a sign the underlying problem needs more sustained treatment. An H2 blocker taken daily, or a short course of a proton pump inhibitor, can heal irritated tissue and break the cycle rather than just putting out fires one episode at a time.