Augmentin (Amoxicillin / Clavulanate) — Patient Guide

Augmentin is an antibiotic medicine used to treat a range of bacterial infections. It combines two active ingredients: amoxicillin and clavulanate (clavulanic acid). In Australia, Augmentin is commonly supplied in different strengths and formulations to suit the type and severity of infection.

This page provides patient-friendly information about how Augmentin works, when it’s used, how to take it safely, and what to expect. Always follow the directions given with your specific product and consult a healthcare professional if you have any questions.

Basic product information

• Brand name: Augmentin
• Active ingredients: amoxicillin / clavulanate
• Medicine type: antibiotic (penicillin-class)
• Common forms: tablets, chewable tablets, and liquid suspensions (strengths vary)
• Availability: Supplied by pharmacies in Australia depending on product type and strength

The exact dose and formulation depend on the infection, age, weight (especially for children), kidney function, and local prescribing guidance. Always check your medicine label for the correct strength and instructions.

How Augmentin works (mechanism of action)

Augmentin contains:

• Amoxicillin: a penicillin antibiotic that kills susceptible bacteria by interfering with the formation of bacterial cell walls.
• Clavulanate: a beta-lactamase inhibitor. Many bacteria produce beta-lactamase enzymes that can break down amoxicillin, making it less effective. Clavulanate helps protect amoxicillin by inhibiting these enzymes.

Together, the combination broadens coverage against bacteria that may otherwise resist amoxicillin alone.

Pharmacokinetics (how the body handles it)

Pharmacokinetics describes how a medicine is absorbed, distributed, metabolised, and eliminated. While individual responses vary, the key points for Augmentin include:

• Absorption: Amoxicillin and clavulanate are absorbed after oral dosing. Taking doses with food can improve tolerability and may improve absorption (particularly for clavulanate).
• Distribution: The ingredients distribute through body tissues and fluids, including sites relevant to common respiratory and urinary tract infections.
• Metabolism: Clavulanate is metabolised to inactive forms. Amoxicillin is partly metabolised.
• Elimination: Primarily via the kidneys. Dose adjustment may be needed in people with impaired kidney function.

If you have kidney problems, it’s important to tell your clinician or pharmacist, as this may affect dosing and safety.

Typical uses in Australia (indications)

Augmentin is used for infections caused by bacteria that are susceptible to amoxicillin (enhanced by clavulanate). In practice, it’s often considered for conditions such as:

• Respiratory tract infections (e.g., some cases of sinusitis, bronchitis, and chest infections)
• Ear, nose, and throat infections (e.g., certain middle ear or throat infections)
• Dental infections
• Skin and soft tissue infections (e.g., infected wounds or bites)
• Urinary tract infections (UTIs) in selected cases where appropriate

The choice to use Augmentin depends on the likely bacteria, severity, local resistance patterns, patient factors, and clinical review. Antibiotics should not be used for viral infections (such as most colds and influenza).

When to take Augmentin (timing and schedule)

Augmentin is commonly taken once or twice daily depending on the formulation and prescribed strength. Some products may be taken two or three times daily for certain indications. Follow your label directions.

• Try to take it at the same times each day to keep antibiotic levels steady.
• Take with food to reduce the chance of stomach upset and diarrhoea.
• Finish the course unless told otherwise by your clinician.

Missing a dose: If you miss a dose, take it as soon as you remember. If it is close to the next dose, skip the missed dose and continue as normal. Do not take double doses.

Food interactions (what to eat with it)

Food can make Augmentin easier to tolerate. In most people:

• Taking with meals is generally recommended, especially if you experience nausea or stomach discomfort.
• Avoid taking on an empty stomach if it upsets your stomach.

No specific food is known to have a dangerous interaction with Augmentin for most patients. However, if you’re on a special diet or have a sensitive digestive system, discuss with a pharmacist.

Alcohol and medicine interactions

Alcohol

There is no single universal rule for alcohol with Augmentin, but alcohol may increase the risk of side effects such as nausea, stomach upset, dizziness, and can worsen dehydration—especially if you have diarrhoea or fever.

For best tolerance, consider avoiding alcohol while taking the antibiotic and during recovery. If you choose to drink, do so sparingly and monitor how you feel.

Other medicine interactions

Several medicines can interact with antibiotics either by affecting kidney function, blood clotting, or gut health. Tell your pharmacist about all medicines you take, including over-the-counter products, vitamins, and herbal supplements.

• Warfarin and other anticoagulants: antibiotics can alter gut bacteria and affect clotting control. Monitoring of INR may be needed.
• Allopurinol: can increase the risk of rash in some people taking amoxicillin.
• Oral contraceptives: most antibiotics (including amoxicillin/clavulanate) are not proven to reduce effectiveness, but diarrhoea or vomiting can reduce absorption of contraceptive hormones. If you have significant gastrointestinal upset, consider additional protection (e.g., condoms) while unwell and for a period after recovery.
• Probenecid: may reduce renal clearance of amoxicillin, potentially increasing levels.
• Other antibiotics or medicines affecting gut flora: not usually a direct “contraindication,” but may influence side effects like diarrhoea.

If you are unsure whether a medicine may interact with Augmentin, ask a pharmacist for individual advice.

Dosing (general guidance)

Dosing for Augmentin depends on the specific product strength, the type of infection, and patient age and weight—particularly for children. The dosage instructions on your medicine carton or label are the safest guide.

Adults

• Doses are individualised based on infection site and severity.
• Kidney function may require dose adjustment.

Children

• Liquid suspensions are usually dosed according to body weight. Confirm the correct strength and measuring method (see “Practical use tips” below).

Kidney impairment

Because the medicine is cleared by the kidneys, people with reduced kidney function may need a different dose or dosing interval. Do not adjust doses yourself—ask your healthcare professional.

Course length

Typical courses vary by infection type and clinical review. For many bacterial infections, courses are often around 5–7 days, but some situations may be shorter or longer. Always complete the course as directed.

Safety profile: who should be careful

Augmentin is generally well tolerated, but like all medicines it can cause side effects. Some reactions can be serious. The list below highlights common and important safety considerations.

Common side effects

• Diarrhoea
• Nausea or upset stomach
• Vomiting
• Skin rash
• Headache

Serious side effects (seek urgent medical help)

• Signs of an allergic reaction, including swelling of the face/lips, difficulty breathing, severe dizziness, or widespread hives.
• Severe or persistent diarrhoea, especially if watery, bloody, or accompanied by fever or abdominal pain. This can indicate antibiotic-associated colitis.
• Severe skin reactions (e.g., blistering, peeling skin, painful sores in the mouth)
• Liver problems: symptoms may include yellowing of the eyes/skin, dark urine, unusual tiredness, or right upper abdominal pain. These are uncommon but can occur with beta-lactam antibiotics.

When to avoid Augmentin or discuss carefully with a clinician

• Previous allergy to penicillins or cephalosporins
• History of serious skin reactions related to antibiotics
• Known liver impairment or prior antibiotic-associated liver effects
• Kidney impairment (requires dose adjustment)
• History of antibiotic-associated colitis

Practical use tips (getting the best results safely)

How to take Augmentin

• Take with food to improve tolerability.
• Measure liquid doses accurately using the provided dosing syringe or measuring cup.
• Shake suspensions well if the product requires it (check the label).
• Store correctly according to the product label (refrigeration may apply to some liquid formulations).
• Keep taking it for the full course even if you feel better early.

Handling missed doses

If you miss a dose, take it when you remember unless it is almost time for the next dose. If you’re unsure, ask a pharmacist.

Managing stomach upset and diarrhoea

• Continue taking with food if tolerated.
• Stay hydrated (especially if diarrhoea occurs).
• Avoid anti-diarrhoeal medicines unless advised by a clinician, particularly if you have fever or blood in stools.

What to do if you suspect allergy

Stop the medicine and seek urgent medical advice if you develop breathing difficulty, facial swelling, or severe rash.

Alternative options

The “best” alternative depends on the infection type, suspected bacteria, previous antibiotic exposure, allergy history, and local guidelines. Alternatives may include:

• Amoxicillin (for infections where beta-lactamase resistance is less likely)
• Other antibiotic classes such as macrolides or cephalosporins in selected cases
• Targeted therapy based on culture and sensitivity results, where available
• Supportive care for mild illness when antibiotics are not indicated

If you have had side effects or allergies with Augmentin, ask your pharmacist or clinician about the most appropriate alternatives.

Recent guidance and antibiotic stewardship (Australia)

In Australia, antibiotic use is guided by national antimicrobial stewardship principles to help slow antibiotic resistance. This typically includes:

• Using antibiotics only when there is a reasonable likelihood of bacterial infection
• Choosing the narrowest effective antibiotic for the infection
• Using the shortest appropriate course length
• Reviewing symptoms regularly and adjusting therapy when needed

If you are unsure whether your symptoms suggest a bacterial infection, speak with a clinician. Many common illnesses are viral and do not benefit from antibiotics.

Delivery and availability in Australia

Augmentin is typically available through Australian pharmacies and may be supplied as:

• Tablets or chewable tablets for some age groups
• Liquid suspensions for children or those who cannot swallow tablets

Online pharmacies generally offer delivery Australia-wide subject to product availability, cold-chain requirements (if applicable), and standard fulfilment processes. Availability can vary by strength and formulation.

When ordering online, ensure you select the correct strength and form (tablet vs suspension) and double-check the dosing instructions provided with your product.

Market and legal context for Australia

Medicines such as Augmentin are regulated in Australia and are supplied under prescription medicine scheduling requirements. Supply and continued use should follow appropriate healthcare advice and product instructions.

Always use antibiotics only for the intended person and the intended indication, and avoid sharing medicines with others.

FAQ

1) Is Augmentin effective for viral infections?

No. Augmentin treats bacterial infections. It does not work against viruses that cause colds, flu, and most sore throats. Using antibiotics when they’re not needed contributes to antibiotic resistance and can increase side effects.

2) How long does it take to start working?

Many people notice improvement within 24–48 hours after starting an antibiotic, depending on the infection. If symptoms are not improving or are worsening after that time, contact a clinician for review.

3) Can I stop Augmentin early if I feel better?

Usually, it’s important to complete the full course as directed. Stopping early can allow surviving bacteria to multiply, increasing the risk of relapse. If you experience significant side effects, seek advice promptly—do not just stop without guidance.

4) What if I get diarrhoea while taking Augmentin?

Mild diarrhoea can occur. However, seek medical advice urgently if you have severe diarrhoea, diarrhoea with blood or mucus, fever, or severe abdominal pain—this may indicate a more serious reaction.

5) Can I take Augmentin with food?

Yes. In fact, taking it with food is often recommended to reduce stomach upset. If your product instructions differ, follow the label.

6) Are there any interactions with birth control?

Antibiotics like amoxicillin/clavulanate are not typically proven to reduce contraceptive effectiveness. However, if you have vomiting or severe diarrhoea, hormone absorption may be affected. Consider additional barrier protection while you’re unwell and for a short period after recovery.

7) What should I do if I’m allergic to penicillin?

Do not take Augmentin if you have a known history of severe penicillin allergy unless a clinician advises otherwise. If you’re unsure about your allergy history, ask a pharmacist or doctor before taking it.

8) Does Augmentin affect the liver?

Liver-related side effects are uncommon but can occur. Seek medical advice if you develop yellowing of the eyes/skin, dark urine, or persistent right upper abdominal discomfort.

9) Can I drink alcohol while taking Augmentin?

It’s generally best to limit or avoid alcohol while you’re taking antibiotics and recovering, particularly if you experience nausea or diarrhoea. If you choose to drink, do so in moderation and monitor for side effects.

10) How should liquid Augmentin be stored?

Follow the storage instructions on your specific product label. Some liquid suspensions require refrigeration after mixing, while others may have different storage requirements.

Quick summary table

Remember: Augmentin is intended to treat bacterial infections. If symptoms do not improve, worsen, or you develop concerning side effects, seek medical advice promptly. For personalised guidance on suitability, dosing, or interactions, consult your pharmacist or healthcare professional.