About co-amoxiclav
Co-amoxiclav is the combined preparation of amoxicillin together with clavulanic acid, widely marketed as Augmentin among other brand and generic names. Amoxicillin kills bacteria by disrupting cell wall synthesis. Clavulanic acid has little antibacterial activity on its own but inhibits beta-lactamase enzymes, protecting amoxicillin from breakdown and extending coverage to organisms that would inactivate plain amoxicillin.
In UK practice it is commonly chosen when a broader beta-lactam spectrum is required or when beta-lactamase production is suspected. Use is directed by prescribers and local antimicrobial stewardship policies both in primary and secondary care.
- Active constituents: amoxicillin plus clavulanic acid
- Drug class: penicillin antibiotic combined with a beta-lactamase inhibitor
- Common brand: Augmentin; generic versions are widely available
Before commencingthe review process. a safety information brief under Health and standard safety safety precautions plus the section Do not apply it in these circumstances.
It covers the following diseases
Co-amoxiclav is prescribed for a range of bacterial infections when its spectrum is appropriate. Conventional indicators include:
- Infections of cutaneous and soft tissue structures such as cellulitis, infected wounds and bite injuries
- Respiratory infections: community acquired pneumonia, acute sinusitis, and exacerbations of chronic bronchitis
- Otitis media and certain dental infections or prophylaxis in dental procedures
- Selected urinary tract and intra-abdominal infections, often as part of combination therapy
- Some post operative wound infections where mixed flora or beta-lactamase producers are suspected
Prescribers should reserve its use for confirmed or strongly suspected bacterial disease and follow local guidance to reduce the risk of antimicrobial resistance.
Forms and strengths available in the UK
In the UK co-amoxiclav is supplied in oral and parenteral formats to meet different clinical needs.
- Tablets: frequently seen in 250 mg/125 mg and 500 mg/125 mg strengths (amoxicillin plus clavulanate)
- Oral suspension: powders for reconstitution for children, commonly providing concentrations such as 400 mg/57 mg per 5 ml after mixing
- Intravenous injection/infusion: formulations for hospital use when parenteral therapy is required
Other countries may offer 875 mg/125 milligram tablets or a secondary option pack sizes. If there is any doubt about the product you receive, consult a pharmacist.
Methods for taking and dosing this medication
Your prescriber will set the dose based on the infection type, severity, body weight and kidney function. Always follow that instruction.
- Adhere to the prescribed schedule and complete the full course unless told otherwise.
- Tablets are usually taken two or three times daily at evenly spaced intervals. Taking with food helps reduce stomach upset.
- Do not break or crush non chewable tablets unless a pharmacist authorises it. Chewable tablets must be chewed.
- Renal impairment may require dose reduction or longer intervals between doses; check with your clinician if you have kidney disease.
As an example, a typical adult regimen for many community infections is 500 mg/125 mg three times daily for 5 to 7 days, but individual plans vary. See related items Guidance for prescribed dose was misseds if you miss a dose.
Cautionary measures and safety guidelines
Discuss the following with your prescriber or pharmacist before starting co-amoxiclav.
- Allergy history: tell clinicians about any penicillin or cephalosporin allergies or prior serious antibiotic reactions.
- Liver history: previous cholestatic jaundice after co-amoxiclav or significant hepatic impairment requires caution.
- Infectious mononucleosis: amoxicillin-containing medicines often cause a rash in this illness and are usually avoided.
- Stools that are loose: report severe or persistent diarrhoea promptly; Clostridioides difficile associated disease may occur after antibiotics.
- Gestation and baby feeding support: use may be appropriate when benefits outweigh risks; discuss in coordination with your prescriber.
- Driving and machines: the medicine does not usually impair driving but do not operate vehicles if you feel dizzy or unwell.
See Situations in which it should not be used for absolute reasons to avoid co-amoxiclav.
Do not apply it in these circumstances
- Known severe hypersensitivity to amoxicillin, clavulanic acid, or any penicillin-class antibiotic
- History of cholestatic jaundice or severe liver dysfunction linked to prior co-amoxiclav use
- Confirmed infectious mononucleosis where amoxicillin is known to produce a rash
If any of these apply to you, do not take co-amoxiclav and seek an a secondary option under medical supervision.
Potential deleterious effects and alert signals
Commonly observed adverse reactions include nausea, vomiting, abdominal pain, bloating, diarrhoea and head pain. Mild skin rashes and yeast infections are also reported.
Less prevalent in use but serious reactions include severe allergic responses (anaphylaxis), hepatitis, cholestatic jaundice and significant liver enzyme elevations. Seek urgent care if you develop difficulty breathing, swelling of the face or throat, widespread rash, yellowing of the skin or eyes, dark urine or pale stools.
If harmful effects are severe or persistent stop the medicine and contact your healthcare provider immediately. For drug combination concerns refer to Potential cross drug mutual interaction between medicationss to keep under observation for.
Critical medicines interaction concerns to note
Always provide a full list of medicines and supplements to your prescriber or pharmacist. Important encounters include:
- Probenecid formulation: reduces renal excretion of amoxicillin and may raise its blood concentrations.
- Vitamin K antagonists such as warfarin: antibiotics can alter gut flora and affect INR; extra tracking and monitoring of performance may be needed.
- Allopurinol: combined use has been linked to an increased risk of rash.
- Methotrexate in cancer treatment: penicillins may reduce renal clearance of methotrexate, raising toxicity risk.
- Oral contraceptives: severe vomiting or diarrhoea may reduce contraceptive absorption; use backup methods if necessary.
- Certain live oral vaccines: antibiotic treatment can reduce vaccine effectiveness; schedule vaccinations appropriately.
When in doubtreview this. with a pharmacist or prescriber before starting new medicines.
How to respond to a i missed one dose
If you forget to take a dose, take it as soon as you remember, unless the next scheduled dose is near. Do not increase your dose to make up for a not taking the dose. Carry on with the remaining doses at the usual times. If you are unsure, contact your pharmacy or prescriber for advice.
An overdose on pills: first response actions
Symptoms of opioid overdose may include severe nausea, vomiting, diarrhoea, drowsiness, agitation, tremor or seizures, especially in people with kidney problems. Very large ingestions can cause crystalluria and kidney injury. If an opioid overdose is suspected seek urgent medical attention or contact emergency services.
Archival securing storage ensures that valuables stay safe. and disposal logistics
- Tablets: store at normal room temperature away from moisture and direct sunlight, typically 15 to 30 C (59 to 86 F).
- Reconstituted oral suspension: usually refrigerated and used within the period stated on the label, commonly 7 to 10 days; do not freeze.
- Ensure medicines are stored away from children and pets.
- Do not dispose of antibiotics via household waste or sewage; return unused or expired medicines to a pharmacy for safe disposal.
Substitute possibilities and a brief comparison
Generic co-amoxiclav provides the same active ingredients as branded Augmentin. Depending on the infection, local protocols and allergy status, prescribers may choose a backup option antibiotics. Common options include:
- Amoxicillin alone: narrower spectrum and does not cover beta-lactamase producing organisms
- Macrolides (clarithromycin, azithromycin): useful in some penicillin allergic individuals and for particular respiratory infections
- Doxycycline: effective for some respiratory infections and tick-borne diseases; avoid in pregnancy and young children
- Cephalosporins (cephalexin, cefuroxime): variant options in many infections but use caution in those with severe penicillin allergy
- Nitrofurantoin or trimethoprim: commonly used for uncomplicated lower urinary tract infections
- Metronidazole: covers anaerobic organisms and is often combined for intra-abdominal infections
Choice should be guided by culture results where available and stewardship policies. Cost, allergy status and local resistance patterns affect selection. See Prices and access in the UK market and services for typical private cross vendor price comparison among vendorss in GBP.
Pricing and access in the United Kingdom
Co-amoxiclav is a Prescription Only Medicine (POM) in the UK and must be supplied with a valid prescription from a UK prescriber. Charges depend on whether you use NHS supply or pay privately.
- NHS prescriptions: in England a standard prescription charge commonly applies per item (check current NHS guidance for the exact fee). Scotland, Wales and Northern Ireland have different arrangements and may offer free prescriptions for eligible residents.
- Private retail prices vary by pharmacy, brand, pack size and region. Typical private price tier ranges in GBP (approximate) are listed below.
- Generic co-amoxiclav 500 mg/125 mg, 21 tablets: around 6 to 20 GBP
- Branded Augmentin 500 mg/125 mg, 21 tablets: around 25 to 45 GBP
- Oral suspension (e.g. 400 mg/57 mg per 5 ml): roughly 6 to 18 GBP per bottle after reconstitution
Approximate private costs for a new possibility options:
- Amoxicillin 500 mg, 21 tablets: 2 to 6 GBP
- Doxycycline 100 mg: 14 capsules, price between 5 and 12 GBP.
- A pack of 14 Clarithromycin 500 mg tablets costs 6 to 15 GBP
- Nitrofurantoin 100 mg MR, fourteen capsule pack, cost 8 to 18 GBP
These figures are approximate and for guidance only. Private and online suppliers should be UK registered; see Regulation and juridical notes (UK).
Regulation and legal annotations (UK)
Important regulatory points when obtaining co-amoxiclav in the UK:
- The status of legality: co-amoxiclav/Augmentin is a Prescription Only Medicine (POM) and cannot be supplied lawfully without a valid prescription from a UK registered prescriber.
- Registered suppliers: legitimate internet pharmacies and dispensing services should be registered with the General Pharmaceutical Council (GPhC).
- MHRA: the Medicines and Healthcare products Regulatory Agency oversees drug licensing and safety vigilant monitoring in the UK.
- Documentation: if you travel with medicines keep them in original packaging with labels and a copy of the prescription. Athletes should keep documentation for anti-doping checks if relevant.
- Disposal and returns: unused antibiotics should be returned to a pharmacy for safe disposal, not thrown away in household rubbish or flushed.
Verify a supplier's credentials on the GPhC or MHRA websites if you have any concerns about legitimacy.
Facts at a glance brief
- Components: amoxicillin plus clavulanic acid
- Common tablet strengths in the UK: 250 mg/125 mg and 500 mg/125 mg
- Supply: Prescription Only Medicine (POM) in the UK
For reminders about dosing, see the instructions below. Steps for taking and dosing, and for a storage solution should balance access and protection. see Personal storage capacity can limit how much you can keep on hand. and disposal.
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