Augmentin (Amoxicillin / Clavulanate) – Patient Information (UK)

Augmentin is an antibiotic medicine used to treat certain bacterial infections. It contains two active ingredients:

• Amoxicillin (a penicillin-type antibiotic)
• Clavulanate (a beta-lactamase inhibitor that helps amoxicillin work against bacteria that can resist it)

This guide explains how Augmentin works, how it is used, common safety considerations, and practical tips to help you get the best outcome from your treatment.

Basic product information

Note: Strengths and dosing schedules differ between products (e.g., “125 mg/31.25 mg” vs “500 mg/125 mg”). Always follow the specific instructions provided for the exact formulation you receive.

How Augmentin works (mechanism of action)

Many antibiotics work by interfering with how bacteria build and maintain their cell walls. Amoxicillin does this by targeting bacterial cell-wall synthesis.

However, some bacteria produce beta-lactamase enzymes that can break down amoxicillin and make it ineffective. Clavulanate helps by inhibiting these enzymes, allowing amoxicillin to remain active.

• Amoxicillin: kills or inhibits bacteria by disrupting cell wall formation
• Clavulanate: blocks bacterial resistance mechanisms (beta-lactamase)

The combined effect helps Augmentin treat infections caused by susceptible bacteria, including certain organisms that resist amoxicillin alone.

Pharmacokinetics (what the body does to the medicine)

Pharmacokinetics describes how the medicine is absorbed, distributed, metabolised, and excreted.

• Absorption: Augmentin is absorbed through the gut. Food can help improve absorption and reduce stomach upset.
• Distribution: Both components distribute into body tissues and fluids, supporting treatment of infections at relevant sites.
• Metabolism: Amoxicillin is partially metabolised.
• Excretion: Both components are mainly cleared via the kidneys. This is particularly important for people with kidney impairment.

Kidney function matters: If you have reduced kidney function, the frequency and/or dose may need adjustment.

Typical uses in adults and children

Augmentin is used for infectious illnesses caused by bacteria that are susceptible to amoxicillin/clavulanate. It may be considered for infections such as:

• Ear, nose and throat (ENT) infections (for example, acute bacterial sinusitis or ear infections)
• Chest infections (for example, some bacterial exacerbations of chronic bronchitis or community-acquired pneumonia—when appropriate)
• Dental infections (including some abscesses related to teeth)
• Urinary tract infections (UTIs) (when caused by susceptible bacteria)
• Skin and soft tissue infections (such as infected wounds or cellulitis)
• Bone and joint infections (selected cases, guided by clinician assessment)

Important: Antibiotics do not treat viral infections such as the common cold or most sore throats caused by viruses.

Timing and how to take Augmentin

Correct timing helps maintain effective antibiotic levels in the body.

General guidance

• Take Augmentin at the times specified on the label (for example, morning and evening, or every 8 hours, depending on the regimen).
• Try to take it with food to reduce the chance of nausea and to support absorption.
• Do not skip doses. If you miss a dose, follow the advice provided with your medicine or contact a pharmacist.
• Complete the course unless advised otherwise by a clinician.

What if you feel better early?

Feeling better does not always mean all bacteria are gone. Finishing the prescribed course helps reduce the risk of relapse and antibiotic resistance.

How to handle different formulations

• Tablets/dispersible tablets: follow the package instructions for swallowing or dissolving.
• Liquid suspensions: shake well before use and measure with an appropriate oral syringe/spoon if provided.

Food interactions and what to eat

There is no “forbidden” food list for Augmentin, but food can affect tolerability and absorption.

• Take with meals: Food helps reduce gastrointestinal side effects such as nausea, vomiting, and diarrhoea.
• If you have an upset stomach: Try taking the dose with a larger snack or meal rather than on an empty stomach.
• Probiotics/fermented foods: Some people find they help with diarrhoea during antibiotics, but responses vary. If you consider probiotic supplements, ask a pharmacist for advice—especially for young children or people with immune problems.

Alcohol and medicine interactions

Alcohol

For many people, moderate alcohol is not directly “blocked” by Augmentin in the way some medicines are. However, antibiotics can make you feel unwell, and alcohol may worsen side effects such as stomach upset and dehydration—particularly if you are also ill.

• Best approach: Avoid alcohol while you’re taking the antibiotic and for at least 24–48 hours after finishing (or choose alcohol-free options).
• Seek advice: If you drink heavily or have liver problems, talk to a pharmacist or clinician for personalised guidance.

Common medicine interactions to consider

Augmentin can interact with other medicines, although not every combination causes problems. Tell your pharmacist if you take any other medicines, including over-the-counter products and herbal remedies.

• Warfarin (and similar anticoagulants): Antibiotics may affect bleeding tendency in some people. Extra monitoring (e.g., INR checks) may be needed.
• Allopurinol: In some people, taking allopurinol alongside amoxicillin can increase the likelihood of skin reactions.
• Oral contraceptives: While evidence is mixed, severe diarrhoea/vomiting can reduce absorption of pills, potentially lowering effectiveness. Use additional contraception if you experience significant gastrointestinal upset.
• Other antibiotics: Combining antibiotics may not always be appropriate.
• Probenecid: May affect clearance of certain penicillins.

Blood sugar medicines: If you have diabetes and take medicines that affect glucose levels, your healthcare team may advise additional monitoring during illness.

Indications: when Augmentin may be appropriate

Clinicians choose antibiotics based on suspected or confirmed bacterial infection, the likely bacteria involved, and your individual risk factors (such as allergies, kidney function, and local resistance patterns).

Augmentin is most often considered when:

• The infection is bacterial (not viral)
• There is a likelihood of organisms that may produce beta-lactamase (making plain amoxicillin less suitable)
• Local treatment guidance supports its use for that infection type

In some cases, culture or other tests may guide which antibiotic is best.

Dosing (how much to take)

Dosing depends on age, weight (especially in children), kidney function, the infection type/severity, and the specific Augmentin product strength.

Always use the exact strength and dosing schedule on your medicine label. The information below is general and not a substitute for personalised instructions.

Common dosing patterns

• Adults: frequently either twice daily or three times daily depending on the formulation and infection.
• Children: dosing is typically based on body weight and may be prescribed as “mg/kg/day” with a specified schedule.

Kidney impairment

If you have reduced kidney function, your clinician/pharmacist may prescribe a modified regimen. Do not adjust your dose yourself.

Duration

Treatment length varies by infection. Typical courses may be several days to around 2 weeks depending on the condition and response.

Contact a pharmacist if you are unsure which Augmentin strength you have or how often to take it.

Safety profile

Like all medicines, Augmentin can cause side effects. Most are mild to moderate and improve after the body adjusts, but some require urgent medical attention.

Common side effects

• Diarrhoea (including mild loose stools)
• Nausea or stomach upset
• Vomiting
• Skin rash (mild rashes can occur)
• Thrush (oral or vaginal) due to changes in normal microbial balance

Seek urgent advice if you notice

• Signs of an allergy: swelling of the face/lips, difficulty breathing, severe rash, wheezing, or feeling faint
• Severe or persistent diarrhoea, especially if watery or bloody, or if accompanied by fever or severe abdominal cramps (possible antibiotic-associated colitis)
• Yellowing of the skin/eyes (jaundice), dark urine, or marked fatigue—these can be signs of liver inflammation
• Severe skin reactions (blistering, peeling, painful rash)

Who should take extra care

• People with a history of penicillin allergy or previous serious allergic reactions to antibiotics
• People with kidney problems
• People with a history of antibiotic-associated diarrhoea or inflammatory bowel disease
• People who have previously had liver problems related to amoxicillin/clavulanate
• Children and older adults (side-effect sensitivity may differ)

Practical use tips (help your treatment work well)

• Take with food: this often improves comfort and reduces stomach upset.
• Hydrate: drinking fluids can help if you’re unwell and may reduce the impact of diarrhoea.
• Store correctly: liquid suspensions may require refrigeration or specific storage—check the label.
• Shake suspensions: ensure uniform dosing in liquid formulations.
• Use a reminder: set alarms for the correct times to reduce missed doses.
• Keep track of side effects: note severity and timing if diarrhoea, rash, or stomach upset occurs.
• Do not save leftover antibiotics: unused antibiotics should be disposed of safely, and future treatment should be clinician-guided.

Alternative options

Antibiotic choice depends on infection type, severity, suspected bacteria, and your medical history (including allergies). Depending on the situation, alternatives may include:

• Amoxicillin alone (where beta-lactamase resistance is not suspected)
• Cephalosporins (in certain bacterial infections; allergy history influences suitability)
• Macrolides (e.g., for people who cannot take penicillins)
• Doxycycline or other options in selected cases
• Topical treatments for some localised infections (where appropriate)

Non-antibiotic supportive care (such as pain relief and hydration) may also be important alongside antibiotic treatment. A pharmacist can explain which options might be suitable if Augmentin isn’t appropriate.

UK market and legal context

In the UK, antibiotic use is tightly guided to support patient safety and reduce antimicrobial resistance.

• Antibiotic stewardship: NHS and public health guidance emphasise using antibiotics only when needed and choosing the narrowest effective options.
• Professional oversight: Medicines are supplied in line with UK regulatory requirements, with checks that you receive the right product for your needs.
• Quality and safety standards: Medicines sold in the UK must meet standards for manufacturing, packaging, and traceability.

Recent guidance (high level): UK antimicrobial stewardship continues to highlight the importance of reassessing symptoms, avoiding antibiotics for likely viral infections, and prioritising appropriate duration and dosing when antibiotics are indicated. Local NHS guidance may differ by infection type and community resistance patterns.

Always consult a healthcare professional if you’re uncertain about whether an infection is likely bacterial.

Delivery and availability in the UK

Augmentin may be available through UK pharmacies and licensed online pharmacy services (where legal supply requirements are met).

• Availability: Common strengths and formulations are often stocked, but availability can vary.
• Delivery times: Delivery depends on the supplier, location, and whether stock is held locally.
• Packaging: Medicines are typically delivered in protective packaging to help prevent damage during transit.

Check your order details carefully on arrival, including strength and formulation (tablet vs suspension) to ensure they match what you expected.

FAQ – Frequently asked questions

1) Can I take Augmentin if I’m allergic to penicillin?

If you’ve had a serious penicillin allergy (such as anaphylaxis), do not take Augmentin unless specifically advised by a healthcare professional. Many penicillin allergies also imply caution with related antibiotics.

2) How soon should I feel better?

Many people notice improvement within 48–72 hours after starting antibiotics. If you feel no better or symptoms worsen, contact a pharmacist or clinician promptly.

3) What should I do if I miss a dose?

Take it as soon as you remember, unless it is near the time of the next dose. Do not take a double dose. If you’re unsure, ask a pharmacist for advice based on your dosing schedule.

4) Is Augmentin effective for all sore throats and colds?

No. Many sore throats and colds are caused by viruses, against which antibiotics are not effective. Antibiotics are used when bacterial infection is suspected or confirmed.

5) Can I drive or operate machinery while taking Augmentin?

Augmentin is not usually associated with driving impairment. If you feel dizzy or unwell, avoid driving and seek advice.

6) Will Augmentin cause diarrhoea?

Diarrhoea can occur with antibiotics. Mild diarrhoea is common. However, seek urgent advice if diarrhoea is severe, persistent, watery, bloody, or associated with fever or severe cramps.

7) What about yeast infections (thrush)?

Antibiotics can disturb normal body flora, sometimes leading to thrush. Treatment options exist—ask a pharmacist for guidance if symptoms occur.

8) Can I drink alcohol during treatment?

It’s safest to avoid alcohol while you’re taking Augmentin, especially if you have stomach upset or feel unwell. Moderate alcohol may not be directly prohibited for everyone, but minimising alcohol is a sensible choice.

9) Does Augmentin interact with warfarin?

It may. If you take warfarin, you may need closer INR monitoring during antibiotic treatment and shortly after. Always inform your healthcare team.

10) What if I develop a rash?

Mild rashes can occur, but some rashes may signal a serious allergy. Seek urgent medical advice if the rash is severe, blistering, spreading rapidly, or occurs with swelling, breathing difficulty, or fever.

11) Can children take Augmentin?

Augmentin can be used in children for appropriate bacterial infections. Dosing is weight-based and varies by formulation. Use only the child-specific product and dosing instructions provided.

12) How should I store Augmentin?

Store tablets according to the pack instructions (typically at room temperature). Liquid suspensions have specific storage instructions and may require refrigeration. Check the label for exact directions.

Summary

Augmentin (amoxicillin / clavulanate) is a combined antibiotic used for bacterial infections where susceptibility to amoxicillin is expected or when beta-lactamase–producing bacteria may be involved. Food can help improve comfort and absorption, and finishing the prescribed course helps ensure effective treatment.

If you experience severe diarrhoea, signs of allergy, or symptoms that do not improve after a few days, contact a pharmacist or clinician for advice.