Alcohol Intolerance Symptoms and Signs

Alcohol Intolerance Symptoms and Signs

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  • Alcohol intolerance doesn’t mean you become drunk faster or after drinking less alcohol.
  • If you have alcohol allergy, the only way to avoid symptoms is to avoid alcohol completely.
  • Intolerance symptoms, however, are localized and primarily related to the body’s inability to metabolize alcohol efficiently.
  • These symptoms can occur almost immediately, sometimes within minutes of drinking.
  • In some cases, your doctor may observe how your body reacts to a controlled amount of alcohol to identify any immediate symptoms.
  • If you’re allergic to a specific ingredient in certain alcoholic drinks, switching to a different alcoholic drink may be an option.

Recognizing the symptoms of each can help you determine the appropriate steps to take. An alcohol allergy, on the other hand, is caused by an immune system response to an ingredient in alcohol, such as grains, chemicals, or preservatives. Common allergens include sulfites, which are used as preservatives in wine and beer, and grains like wheat, barley, rye, corn, or rye, which are found in beer and whiskey. In rare cases, an alcohol allergy can be life-threatening, requiring emergency treatment. If you suspect you have an alcohol allergy or intolerance, it is important to consult a healthcare professional for proper diagnosis and guidance. They may recommend avoiding alcohol or switching to different alcoholic drinks if you are allergic to specific ingredients.



Signs Of Alcohol Intolerance Include :


alcohol intolerance vs allergy

Allergic reactions can be severe and even life-threatening (anaphylaxis), requiring immediate medical attention. Alcohol intolerance and alcohol allergy are two different conditions that share some similar symptoms. Alcohol intolerance is a genetic condition that makes it difficult for the body to process alcohol. It occurs when the body does not have the proper enzymes to break down (metabolise) the toxins in alcohol. This results in symptoms such as a headache, runny nose, upset stomach, skin flushing, and nausea.


alcohol intolerance vs allergy

Not sure if you have alcohol intolerance or allergies? Learn how to get an allergy test.


To differentiate between the two, consider the severity and onset of symptoms. Intolerance symptoms are generally dose-dependent—the more you drink, the worse you feel. For instance, a single glass of wine might cause mild flushing, while a second could intensify nausea.


  • The primary distinction between alcohol allergy and intolerance lies in the nature and severity of symptoms.
  • Though true alcohol allergies are rare, they still occur and can cause severe symptoms like rashes, trouble breathing, stomach cramps, collapse, or anaphylaxis.
  • In rare cases, an alcohol allergy can be life-threatening, requiring emergency treatment.
  • The symptoms of an alcohol allergy can vary widely, ranging from mild intolerances to severe, dangerous allergic reactions.
  • Beyond simple irritation and reflux, some people experience throat pain due to a biological intolerance or heightened sensitivity to specific components in alcoholic beverages.
  • It can increase the sedative effects of these medications, leading to drowsiness and impaired coordination.



The content, including but not limited to, text, graphics, Alcohol Intolerance images and other material contained on this website is for informational purposes only. No content on this website is intended to be a substitute for professional medical advice, diagnosis, or treatment, nor represent the opinion of our physicians. Always seek the guidance of a qualified healthcare provider for any medical condition or concern. Yes, non-alcoholic beverages like grape juice and certain soft drinks can also contain sulfites and histamines, which may trigger reactions in susceptible individuals. Those who notice an increase in their asthma symptoms after drinking alcoholic beverages, especially wine, might be reacting to potassium metabisulfite, a common preservative.


alcohol intolerance vs allergy

Signs & Symptoms of Alcohol Allergies


Acetaldehyde starts to build up in your blood and tissues, causing symptoms. If you have any unpleasant symptoms after drinking alcohol, see your healthcare provider. Your provider can help get to the bottom of your symptoms and recommend the best next steps.



If the intolerance is severe, symptoms like major headaches can occur that can carry on for one or two hours. Every person, situation, and severity are different, and not everyone will experience intolerances the same way. It is important to note that only some people with these diseases actually develop alcohol intolerance. Depending on the allergy severity, a person may treat symptoms with over-the-counter medications, such as oral antihistamines, if the reaction is mild. The doctor may refer the person to an allergy specialist for further testing and treatment.