Relief from severe heartburn starts with neutralizing the acid that’s already splashing into your esophagus, then making changes so it doesn’t keep happening. Over-the-counter antacids work within minutes, but if your heartburn is intense or keeps coming back, you likely need a combination of medication, positioning, and trigger avoidance to get it under control.
What Works Fastest Right Now
Antacids are your quickest option. Chewable or liquid antacids containing calcium carbonate or magnesium hydroxide neutralize stomach acid on contact and typically bring relief within five to ten minutes. They won’t last long, usually one to two hours, but they’re the fastest way to take the edge off.
Alginate-based products (like Gaviscon) work differently and can be especially helpful for bad episodes. When the alginate hits your stomach acid, it forms a gel that floats on top of the acid like a physical raft, blocking it from splashing up into your esophagus. This barrier effect can complement standard antacids nicely.
If antacids alone aren’t cutting it, H2 blockers (famotidine is the most common) reduce acid production and typically kick in within 30 to 60 minutes. They last longer than antacids, around four hours. You can take an antacid for immediate relief and an H2 blocker to keep the acid down for the next several hours.
For heartburn that hits multiple days a week, over-the-counter proton pump inhibitors are the strongest option. They block acid production more completely, maintaining lower acid levels for 15 to 22 hours compared to about four hours with H2 blockers. The tradeoff: PPIs take one to four days to reach full effect, so they aren’t a quick fix for tonight’s flare-up. They’re better as a short course when heartburn has become a pattern.
Baking Soda as a Quick Home Remedy
Half a teaspoon of baking soda dissolved in a glass of cold water can neutralize stomach acid quickly. You can repeat this every two hours if needed, but don’t exceed five teaspoons in a day. It works because sodium bicarbonate is a base that reacts directly with hydrochloric acid in your stomach.
This is strictly a short-term fix. Regular use can cause your body to retain water, which is a problem if you have high blood pressure, heart disease, or kidney issues. Baking soda also interferes with absorption of other medications, so space it at least one to two hours away from anything else you take by mouth.
Position Your Body to Stop the Burn
Gravity is one of the most effective tools against heartburn, and it’s free. If you’re lying down, get upright. If you need to stay in bed, lie on your left side. This positions your esophagus above the level of your stomach, so acid is less likely to flow upward. Sleeping on your right side does the opposite: it puts the opening between your stomach and esophagus below the pool of acid, making reflux worse and slowing the time it takes your esophagus to clear the acid.
Elevating the head of your bed by about six inches (using a wedge pillow or blocks under the bed frame) also helps. Stacking regular pillows usually doesn’t work well because they bend you at the waist rather than tilting your whole torso, which can actually increase abdominal pressure.
Common Triggers That Make It Worse
Certain foods relax the muscular valve between your esophagus and stomach, letting acid escape upward. The main culprits are high-fat meals, chocolate, alcohol, and carbonated drinks. These don’t just irritate your stomach. They physically weaken the barrier that’s supposed to keep acid where it belongs. Switching to lean proteins like skinless poultry, fish, or tofu can noticeably reduce symptoms because fat is one of the strongest triggers for valve relaxation.
Eating within two to three hours of lying down is one of the most reliable ways to trigger nighttime heartburn. A full stomach produces more acid, and a horizontal position lets that acid reach your esophagus easily. If you ate a big meal late, staying upright for at least two hours before bed makes a real difference.
Tight clothing is an underrated trigger. Research on patients with esophageal inflammation found that wearing a snug waist belt increased acid reflux roughly eightfold. The belt raised pressure inside the abdomen by about 9 mmHg after a meal, doubled the number of reflux episodes, and nearly quadrupled the time it took the esophagus to clear acid (from 23 seconds to over 81 seconds). If your heartburn flares after meals, loosening your belt or switching to looser pants can provide surprisingly quick relief.
OTC Acid Suppressors: How Long Is Safe
Over-the-counter PPIs are meant for 14-day courses, no more than once every four months. The standard dose is one pill daily, taken 30 minutes before breakfast with a full glass of water. Going beyond this window without guidance from a provider increases the risk of side effects that build up quietly over time.
Long-term PPI use has been linked to low magnesium levels, which can cause muscle cramps, irregular heartbeat, and fatigue. It’s also associated with a higher risk of hip, spine, and wrist fractures, likely because reduced stomach acid impairs calcium absorption. The FDA has issued safety alerts about both of these risks. None of this means PPIs are dangerous for a two-week course, but it’s why the packaging says to limit use.
H2 blockers are generally considered safer for longer stretches but are less potent. If you find yourself reaching for any acid-reducing medication more than a couple of times a week for several weeks, that pattern itself is worth discussing with a provider, because persistent heartburn sometimes signals a condition that benefits from a more targeted approach.
When Heartburn Might Not Be Heartburn
Severe chest burning can feel nearly identical to a heart attack, and even experienced physicians sometimes can’t tell the difference based on symptoms alone. Classic heartburn tends to produce a burning sensation in the chest, often after eating or when lying down, and it typically responds to antacids. A sour taste or a small amount of liquid rising into your throat usually points toward reflux.
Heart attack symptoms overlap more than most people realize. They can include nausea, indigestion, and abdominal pain, all things that feel like bad heartburn. But a heart attack is more likely to involve pressure or squeezing in the chest that spreads to the neck, jaw, or arms, along with shortness of breath, cold sweats, sudden dizziness, or unusual fatigue.
If you have persistent chest pain and aren’t sure whether it’s heartburn, calling 911 is the right move. Even if the pain subsides on its own within a few hours, that episode is worth mentioning to a provider. Both heartburn and developing heart attacks can produce symptoms that come and go, and a brief episode of chest pain doesn’t rule out a cardiac cause.