Augmentin Rash: A Closer Look at Augmentin Skin Reactions

Dinesh Patel
Medically reviewed by
Dr. Kaushal

Review medical content on WOW Rx Pharmacy, so that accurate drug use information is easily accessible to everybody.
Dr. Akansha is a licensed Clinical Pharmacologist. She possesses remarkable knowledge in Pharmacovigilance, prescription analysis, drug information, and drug safety services. Additionally, she is a keen learner and an educator.

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Reaction of augmenting with skin leading to rashes

While Augmentin effectively fights various bacterial infections, its use may sometimes lead to unexpected side effects. Among these potential side effects, Augmentin rash can develop in certain individuals.

While these rashes do not always indicate an allergic reaction, they can cause discomfort and concern. Research indicates that approximately 3% of individuals who take Augmentin may experience skin rashes.  

This article will examine the nature of the Augmentin rash, its symptoms, its causes, and how to manage it. 

Rash with Augmentin

Augmentin rash is a skin reaction that occurs as a side effect of taking Augmentin. This rash can manifest in various forms, like hives, welts, itching, or skin redness. They often start on the chest or back and spread to the arms and legs. 

In some cases, additional symptoms like itching around the genital area and pain during sexual intercourse may occur. Additionally, some children may develop a skin rash while taking Augmentin or its counterpart, Amoxicillin. However, it’s important to note that Augmentin rash is not always a sign of an allergic response.

Around 5 to 10% of children using Augmentin can develop a rash. 

Signs of Augmentin skin rash

Skin reactions to medications like Augmentin can vary widely, ranging from mild irritation to severe allergic reactions. The skin rash can start to develop after 5-7 days of taking Augmentin. The different signs of an Augmentin rash can help people understand if it is an allergic or non-allergic reaction. 

Non-allergic reaction signs

It is important to know that not all Augmentin rashes occur because someone is allergic to the medicine’s ingredients. People can develop rashes due to other factors, such as viral infections. Non-allergic rashes have signs such as small, widespread pink spots or slightly raised pink bumps. They tend to appear symmetrically on the chest, abdomen, or back and may involve the face, arms, and legs. 

These non-allergic rashes can resolve in three to six days, and they are usually not contagious. 

Augmentin allergic reaction rash

Sometimes, Augmentin can cause an allergic reaction in the skin. The signs of this allergic reaction include the sudden onset of rash within two hours of the first dose, difficulty breathing or swallowing, or very itchy hives. If any of these symptoms occur, seek medical attention promptly.

Underlying causes of Augmentin skin rash

Augmentin rash can range from mild to severe and may occur shortly after initiating treatment or after prolonged use. The causes of Augmentin rash include: 


The causes of Augmentin rash are mainly hypersensitivity reactions to the medication or its component, i.e., Amoxicillin and Clavulanate. These reactions can occur in individuals with a history of allergy to penicillin, asthma, hay fever, or urticaria.

Up to 10% of patients may experience hypersensitivity reactions to Augmentin, presenting as dermatologic conditions such as skin rash. In some cases, these reactions can be severe, like Stevens-Johnson syndrome or toxic epidermal necrolysis. 

Viral infections

A magnified view of virus
A magnified view of virus

Augmentin rash can also be a reaction to viral infection in the body. Interestingly, the risk of developing a skin rash while taking Augmentin appears to be higher in individuals suffering from viral infections rather than bacterial ones. 

For instance, studies have shown that many individuals with mononucleosis (also known as “mono”) may experience a rash if they recently took Amoxicillin, a component of Augmentin. 

Viral illnesses seem to sensitize the body to Augmentin and related antibiotics, increasing the likelihood of rash development.

Stevens-Johnson Syndrome

While rare, Augmentin use has been associated with a condition known as Stevens-Johnson syndrome (SJS). Augmentin-induced SJS comprises less than 1% of reported cases. SJS  can cause a widespread rash that causes the skin to blister and peel. 

This can result in serious complications such as skin infections, difficulty breathing, and pain in various parts of the body. 

Interaction with Allopurinol

The risk of developing a rash increases when Augmentin is taken with Allopurinol, a medication used to treat gout and kidney stones. The exact mechanism by which Allopurinol increases the risk of rash when taken with Augmentin is not fully understood. 

However, both medications individually carry a risk of causing rashes. Therefore, the risk of developing a rash may be compounded when used together. Before initiating treatment with Augmentin, it is crucial to inform your doctor if you are already taking Allopurinol. 

Taking Augmentin and oral contraceptives simultaneously may lead to reduced efficacy of the birth control pills. To mitigate this risk, individuals should consider using additional methods of contraception, such as condoms, during antibiotic treatment.

Renal side effects

Augmentin can rarely cause renal complications like acute renal failure and acute interstitial nephritis. These complications might come with fever or rash. While renal complications associated with Augmentin are rare, prompt recognition and stopping of treatment is essential to manage these potentially severe adverse effects effectively.

Management of Augmentin rash

If a person develops a rash while taking Augmentin, consult a healthcare provider promptly. The provider may recommend:

  • Upon recognition of the rash, healthcare providers typically advise discontinuing Augmentin immediately to prevent further worsening of symptoms
  • In cases of confirmed allergy to Augmentin, healthcare providers will prescribe alternative antibiotics to treat the underlying infection effectively
  • In mild cases of allergic reactions, over-the-counter Antihistamines may help alleviate itching and discomfort 


While Augmentin is an effective antibiotic used to treat bacterial infections, it can sometimes lead to skin rashes, ranging from mild to severe. 

Not all rashes occurring during Augmentin treatment indicate an allergic reaction; however, allergic reactions require immediate medical attention. Factors such as hypersensitivity, viral infections, and interactions with other medications like Allopurinol can contribute to the likelihood of developing a rash.

Prompt recognition and management of Augmentin rash are crucial to prevent complications. By staying informed and proactive, people can effectively navigate the potential risks associated with Augmentin. 

Frequently Asked Questions

Can Augmentin cause a rash?

Yes, Augmentin can cause a rash, a potential side effect in some individuals. These rashes may manifest as non-allergic reactions or allergic reactions, with distinct characteristics like itching, redness, or hives. It is important to consult a healthcare provider if you experience any rash, as they can provide needed guidance.

How long does an Augmentin rash last?

The duration of an Augmentin rash can vary depending on the underlying cause. Non-allergic rashes associated with Augmentin typically persist for a few days before resolving. However, allergic reactions can lead to more persistent or severe rashes, requiring immediate medical attention.

Can Augmentin cause an itchy rash?

Yes, Augmentin can cause an itchy rash in some individuals, particularly in the case of allergic reactions. Itchy hives are common among allergic reactions to Augmentin and may indicate the need for urgent medical evaluation and treatment.

Can Augmentin cause a rash on the face?

Augmentin can cause a rash on the face. It is an antibiotic that contains amoxicillin, which can cause a rash in about 10% of people who take it. The rash can develop on chest and abdomen, and then it can spread to face and legs. 

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