Acid reflux is a common digestive issue that can cause burning, discomfort, and a sour or bitter taste in the mouth. It happens when stomach contents flow backward into the esophagus. The esophagus is not designed to handle stomach acid the same way the stomach is, so reflux can irritate the lining and cause symptoms such as heartburn or regurgitation.

Occasional acid reflux after a heavy meal may not be unusual. However, frequent acid reflux, symptoms that interfere with sleep, or reflux that keeps returning may point to gastroesophageal reflux disease, also called GERD. GERD is a longer-lasting condition that can cause repeated symptoms or complications over time.

This article explains what acid reflux is, common acid reflux symptoms, whether acid reflux is normal, what causes it, and when treatment may help.

What Is Acid Reflux?

Acid reflux occurs when stomach contents move upward into the esophagus. This backward movement is also called gastroesophageal reflux, or GER. In some people, reflux causes heartburn, which is a burning feeling in the chest or upper abdomen.

Normally, a muscle at the bottom of the esophagus called the lower esophageal sphincter helps keep stomach contents where they belong. When this muscle weakens, relaxes at the wrong time, or does not close properly, acid can move upward and irritate the esophagus.

In short, acid reflux means stomach acid is going the wrong way.

Is Acid Reflux Normal?

Occasional acid reflux can be normal. Many people experience reflux once in a while, and it may happen without causing serious symptoms. It is often linked to eating a large meal, lying down after eating, pregnancy, certain foods, or temporary digestive changes.

Acid reflux may be less normal when it happens often, becomes painful, wakes you up at night, causes trouble swallowing, or does not improve with basic lifestyle changes. Frequent reflux may be a sign of GERD, which can require medical evaluation and treatment.

Simple answer: occasional acid reflux can be normal. Frequent or worsening acid reflux should be checked.

Acid Reflux vs. GERD: What’s the Difference?

Acid reflux and GERD are related, but they are not exactly the same.

The Canada Drugs Direct GERD condition page describes GERD as a digestive disorder where stomach acid comes up from the stomach into the esophagus and may cause heartburn or acid indigestion.

Common Acid Reflux Symptoms

Acid reflux symptoms can vary from person to person. The most common symptoms include heartburn and regurgitation. Regurgitation means food or sour liquid backs up into the throat or mouth.

Common acid reflux symptoms may include:

• Burning in the chest, often after eating

• Sour, bitter, or acidic taste in the mouth

• Backwash of food or liquid into the throat

• Upper abdominal or chest discomfort

• Trouble swallowing

• Feeling like there is a lump in the throat

• Chronic cough, hoarseness, or laryngitis

• Symptoms that feel worse when lying down or at night

The provided Canada Drugs Direct GERD page also lists symptoms such as heartburn, regurgitation, difficulty swallowing, chest pain, chronic cough, laryngitis, new or worsening asthma, and disrupted sleep.

Chest pain should always be taken seriously. Because heartburn and heart-related symptoms can sometimes feel similar, seek urgent medical care if chest pain is severe, new, spreading to the arm or jaw, or accompanied by shortness of breath, sweating, dizziness, or weakness.

What Causes Acid Reflux?

Acid reflux often starts with a problem involving the lower esophageal sphincter. When this valve-like muscle relaxes when it should not, stomach acid can move upward into the esophagus.

Several factors may contribute to acid reflux, including:

If the lower esophageal sphincter does not close well, acid can escape from the stomach into the esophagus.

A very full stomach can increase pressure and make reflux more likely.

Gravity helps keep stomach contents down. Lying flat soon after a meal can make reflux easier.

A hiatal hernia happens when part of the stomach moves upward through the diaphragm. This can contribute to reflux in some people.

Pregnancy can increase reflux because of hormonal changes and pressure on the stomach. The Canada Drugs Direct GERD page notes that GERD may occur during pregnancy and may improve after childbirth.

Excess abdominal pressure can push stomach contents upward and contribute to reflux. Mayo Clinic notes that excess weight can put pressure on the abdomen and push the stomach upward, contributing to reflux.

Smoking can reduce the lower esophageal sphincter’s ability to function properly, which may worsen reflux.

Some medications may contribute to reflux symptoms. The Canada Drugs Direct GERD page lists examples such as aspirin, ibuprofen, and some blood pressure medications. Always ask a healthcare provider before stopping or changing any medication.

Foods and Habits That May Trigger Acid Reflux

Not everyone has the same triggers. A food that bothers one person may not bother another. Alberta Health Services notes that people do not need to avoid foods or actions that do not cause symptoms for them.

Common reflux triggers may include:

• Fatty or fried foods

• Large meals

• Eating late at night

• Lying down soon after eating

• Chocolate

• Caffeine

• Peppermint

• Alcohol

• Smoking

• Spicy or acidic foods, depending on the person

Keeping a simple symptom diary can help identify personal triggers. Track what you ate, when symptoms started, whether you were lying down, and what helped.

When Should You See a Doctor?

You should speak with a healthcare provider if acid reflux happens frequently, affects your sleep, interferes with daily life, or does not improve with lifestyle changes or over-the-counter options.

Seek medical advice promptly if you have warning symptoms such as:

• Chest pain

• Trouble swallowing

• Pain when swallowing

• Persistent vomiting

• Loss of appetite

• Unexplained weight loss

• Vomit that contains blood or looks like coffee grounds

• Black or bloody stool

NIDDK lists these as symptoms that may be related to GERD complications or other serious health problems.

How Acid Reflux Is Treated

Acid reflux treatment depends on how often symptoms occur, how severe they are, and whether GERD or another condition is involved.

Common approaches may include:

Lifestyle changes may help reduce symptoms. These can include eating smaller meals, avoiding personal trigger foods, not eating close to bedtime, losing weight if needed, quitting smoking, and elevating the head of the bed for nighttime symptoms. HealthLinkBC notes that GERD treatment often starts with habit changes and over-the-counter medicines.

Antacids may help neutralize existing stomach acid and provide short-term relief for occasional symptoms.

H2 blockers reduce the amount of acid the stomach makes. NIDDK notes that H2 blockers can help heal the esophagus, although proton pump inhibitors may do this more effectively in GERD.

Proton pump inhibitors, often called PPIs, reduce stomach acid production and are commonly used for GERD symptoms or esophageal healing. NIDDK states that PPIs are better at treating GERD symptoms than H2 blockers and can heal the esophageal lining in most people with GERD.

If symptoms are severe, unusual, or do not respond to treatment, a healthcare provider may recommend tests such as endoscopy, acid monitoring, or other evaluations. The Canada Drugs Direct GERD page lists diagnostic options including upper endoscopy, ambulatory acid probe testing, esophageal manometry, barium swallow, and Bravo capsule testing.

Where Pepcid May Fit Into Acid Reflux Relief

Pepcid is a brand name for famotidine. Famotidine is an H2 blocker, a type of medicine that helps reduce the amount of acid made in the stomach. The Canada Drugs Direct Pepcid page describes Pepcid, also known as famotidine, as a medication used to reduce stomach acid and relieve symptoms such as heartburn and acid reflux.

Health Canada’s non-prescription famotidine labelling standard lists uses including relief of heartburn, indigestion, sour stomach, and symptoms related to excess stomach acid.

Pepcid may not be appropriate for everyone. People with kidney problems, allergies to famotidine or other H2 blockers, pregnancy or breastfeeding considerations, or those taking other medications should speak with a healthcare provider or pharmacist before use. The Canada Drugs Direct Pepcid page advises consulting a healthcare provider about health conditions, allergies, current medications, and pregnancy or breastfeeding before taking Pepcid.

For more information, see Canada Drugs Direct’s Pepcid product page and GERD medical condition page.

Acid reflux happens when stomach contents move back up into the esophagus. Occasional reflux can be common, but frequent symptoms may be a sign of GERD. The most common acid reflux symptoms are heartburn and regurgitation, but reflux can also cause cough, throat irritation, disrupted sleep, or trouble swallowing.

Lifestyle changes may help many people, but recurring or severe symptoms should be discussed with a healthcare provider. Treatment options may include antacids, H2 blockers such as famotidine, proton pump inhibitors, or further medical evaluation depending on the situation.

What is acid reflux?

Acid reflux is the backward flow of stomach contents into the esophagus. It can cause heartburn, sour taste, regurgitation, chest burning, or throat irritation.

Is acid reflux normal?

Occasional acid reflux can be normal and may happen after large meals or lying down after eating. Frequent, painful, or recurring reflux is not something to ignore and may be a sign of GERD.

What are common acid reflux symptoms?

Common acid reflux symptoms include heartburn, sour or bitter taste, regurgitation, chest discomfort, trouble swallowing, chronic cough, hoarseness, and symptoms that worsen when lying down.

What causes acid reflux?

Acid reflux is often caused by a weakened or relaxed lower esophageal sphincter. Other contributors may include large meals, lying down after eating, hiatal hernia, pregnancy, smoking, excess weight, certain foods, and some medications.

What is the difference between acid reflux and GERD?

Acid reflux refers to stomach contents flowing back into the esophagus. GERD is a more severe or long-lasting condition where reflux causes repeated symptoms or complications.

Can Pepcid help with acid reflux?

Pepcid, also known as famotidine, is an H2 blocker that reduces stomach acid. It is used for symptoms such as heartburn and acid reflux, but it may not be right for everyone. Ask a healthcare provider or pharmacist if you are unsure.

When should I worry about acid reflux?

Seek medical care if reflux is frequent, worsening, affecting sleep, or comes with trouble swallowing, unexplained weight loss, persistent vomiting, bleeding, or chest pain.