Alcohol can irritate the stomach lining, increase acid release and contribute to digestive problems, including gastritis, nausea, vomiting and diarrhoea.
The effects vary depending on the amount consumed, the frequency of drinking and a person’s underlying health. Alcohol can also worsen acid reflux, a condition in which stomach contents flow back into the oesophagus, the tube connecting the throat to the stomach.
How alcohol affects the stomach
Gastritis occurs when the stomach lining becomes inflamed. Heavy alcohol consumption can irritate and damage this protective lining, leaving it more vulnerable to digestive acids.
According to the Mayo Clinic, gastritis can develop suddenly or gradually. Symptoms may include upper abdominal pain or a burning sensation, nausea, vomiting and feeling unusually full after eating. Some people have no symptoms.
Alcohol is not the only cause. Infection with Helicobacter pylori bacteria, regular use of certain painkillers and autoimmune conditions can also lead to gastritis.
Persistent symptoms should be assessed by a healthcare professional because stomach discomfort does not necessarily mean a person has gastritis. Treatment depends on the underlying cause and may include medication to reduce stomach acid or address an infection.
Why alcohol can cause other digestive problems
Alcohol affects more than the stomach. It can irritate the oesophagus and intestines, promote inflammation and interfere with the normal functioning of the digestive tract.
These effects may contribute to nausea, vomiting, diarrhoea and poor nutrient absorption, particularly with heavy or repeated alcohol consumption.
Alcohol can also worsen heartburn and acid reflux in some people. Carbonated drinks may contribute to bloating, but carbonation is not the only cause of digestive discomfort, and switching between alcoholic beverages does not eliminate alcohol’s effects.
Dehydration may contribute to some symptoms associated with drinking. Alcohol increases urine production, which can lead to fluid loss and contribute to thirst, fatigue and headaches.
Painkillers and alcohol
Combining alcohol with certain medicines can increase the risk of harm.
Acetaminophen, known as paracetamol in Uganda and other countries, can cause serious liver damage when taken in excessive amounts. The risk associated with alcohol depends on factors including drinking patterns, dosage and a person’s liver health.
Non-steroidal anti-inflammatory drugs, including ibuprofen and aspirin, can irritate the stomach lining and increase the risk of gastrointestinal bleeding. Alcohol can increase that risk.
People should check medicine instructions and consult a pharmacist or healthcare professional before combining alcohol with medication. Painkillers should not be used as a general remedy for alcohol-related stomach discomfort without considering their risks.
What helps relieve stomach discomfort?
Avoiding alcohol is the most direct way to prevent further alcohol-related irritation. People whose symptoms repeatedly follow alcohol consumption should stop drinking and seek medical advice if the problem persists.
Drinking water can help replace fluids lost through increased urination or vomiting. However, water does not reverse inflammation or prevent all complications associated with alcohol.
Antacids may relieve some symptoms caused by excess stomach acid, but they do not treat every cause of abdominal pain. A pharmacist or healthcare professional can advise whether they are appropriate.
People should seek medical assessment if stomach pain or indigestion lasts longer than a week, keeps returning or becomes progressively worse.
When to seek urgent medical care
Alcohol-related stomach problems can sometimes involve serious complications. Heavy consumption can contribute to gastrointestinal bleeding, while repeated forceful vomiting can cause a tear in the lining of the oesophagus.
Seek urgent medical attention if you vomit blood, pass black or tarry stools, experience sudden or severe abdominal pain, or develop persistent vomiting that prevents you from keeping fluids down. Dizziness, fainting or signs of severe dehydration also require prompt assessment.
The safest way to prevent alcohol-related stomach irritation is to avoid alcohol. Recurrent symptoms should not automatically be dismissed as a hangover because they may indicate gastritis or another digestive condition.
