The fastest way to calm acid reflux is to neutralize the acid that’s already in your esophagus. An over-the-counter antacid starts working within minutes by directly binding to stomach acid and raising your pH. Beyond that quick fix, a combination of positioning, timing, and habit changes can keep symptoms from returning. Here’s what actually works, and why.
Quick Relief When Symptoms Hit
Antacids (the chewable tablets or liquid you’d grab at a pharmacy) are the fastest-acting option. They neutralize stomach acid on contact, providing relief within minutes of swallowing. The tradeoff is that the relief is short-lived. The actual buffering effect lasts roughly 30 minutes, though pain relief can extend to about two hours. Liquid antacids work faster than tablets, so if you’re in the middle of a bad episode, reach for the liquid form if you have it.
If you don’t have antacids on hand, half a teaspoon of baking soda dissolved in a glass of cold water works on the same principle. It neutralizes acid quickly. But this is a rescue remedy, not a routine. Baking soda is high in sodium and shouldn’t be used for more than two weeks straight. The standard dose is half a teaspoon in water every two hours, with a daily maximum of five teaspoons.
One surprisingly effective trick: chew a piece of sugar-free gum. Chewing gum roughly doubles your saliva production, and that extra saliva washes acid back down out of the esophagus. In a study from the University of Dundee, doubling saliva flow cut acid clearance time from nearly 7 minutes down to about 2.3 minutes. It won’t stop acid production, but it clears what’s already causing pain.
Change Your Position
If reflux hits while you’re lying down, how you reposition matters more than you might think. Lying on your left side clears acid from the esophagus significantly faster than lying on your back or right side. The anatomy is straightforward: your stomach curves to the left, so when you lie on that side, the junction where your esophagus meets your stomach sits above the pool of acid rather than below it. The acid still enters the esophagus at similar rates regardless of position, but it drains away much faster on the left side.
Standing or sitting upright also helps, since gravity pulls acid back down into the stomach. If you’re dealing with reflux regularly at night, a wedge pillow can make a real difference. Cleveland Clinic recommends one that elevates your head 6 to 12 inches at a 30- to 45-degree angle. Stacking regular pillows doesn’t achieve the same thing because they bend you at the neck rather than tilting your entire torso.
Prevent the Next Episode
Most reflux episodes are triggered by something you ate, when you ate it, or what you did afterward. The single most effective timing change is to stop eating at least three hours before you lie down. When you eat and immediately recline, your stomach is full of acid working on digestion, and gravity is no longer helping keep it in place.
Certain foods loosen the muscular valve between your stomach and esophagus, the ring of muscle that’s supposed to keep acid contained. The main culprits are coffee, tea, chocolate, peppermint, cocoa, and caffeinated sodas. These don’t just irritate your stomach. They chemically relax that valve, making it easier for acid to escape upward. Fatty and fried foods slow stomach emptying, which keeps pressure high for longer. Alcohol does both: it relaxes the valve and increases acid production.
Smaller meals help because they put less pressure on that valve. A large meal expands your stomach, physically pushing its contents toward the opening. Eating moderate portions and avoiding tight-fitting clothing around your midsection both reduce that mechanical pressure.
Over-the-Counter Medications Compared
If antacids aren’t enough, you have two other categories of medication available without a prescription, and they work very differently.
H2 blockers (like famotidine) reduce the amount of acid your stomach produces. They kick in relatively quickly and can be taken as needed when you feel symptoms coming on. They’re a good middle ground between antacids and stronger options.
Proton pump inhibitors, or PPIs (like omeprazole), are the most powerful acid suppressors available over the counter, but they aren’t designed for immediate relief. They need to be taken daily for 4 to 8 weeks to fully work, because not all acid-producing cells in your stomach are active at the same time. Taking a PPI “as needed” won’t reliably control symptoms. These are better suited for people who have reflux multiple times a week and need consistent suppression rather than occasional rescue.
What Persistent Reflux Can Signal
Occasional heartburn after a big meal is common and manageable with the strategies above. But reflux that persists for weeks despite lifestyle changes and medication, or that gets progressively worse, can point to gastroesophageal reflux disease (GERD), a chronic condition where repeated acid exposure starts to damage the lining of your esophagus.
Certain symptoms alongside reflux are considered red flags: difficulty swallowing, pain when swallowing, unintentional weight loss, vomiting blood or material that looks like coffee grounds, persistent vomiting, or unexplained anemia. These warrant prompt evaluation because they can indicate complications like esophageal narrowing or, rarely, precancerous changes in the tissue. Current gastroenterology guidelines recommend an upper endoscopy for anyone with reflux who develops these symptoms.