A cephalosporin antibiotic
Cefuroxime
A cephalosporin antibiotic used for a range of respiratory, urine and skin infections.
What is Cefuroxime?
Cefuroxime is a cephalosporin antibiotic used for infections of the chest, sinuses, ear, throat, urine and skin, and sometimes for infections caught after surgery. It is related to penicillin, so it is used with caution in people with penicillin allergy. The oral form is best taken with food to help it absorb.
Education and reference only. This is a plain-language guide to Cefuroxime — it deliberately contains no doses. Doses depend on the person, the brand and the reason for treatment, and belong with your prescriber. Always check the BNF, the product labelling (SmPC) and follow medical advice.
What it is
Cefuroxime is a cephalosporin, a family of antibiotics closely related to the penicillins. It is used in UK practice for a variety of bacterial infections — including chest, sinus, ear, urine and skin infections — and a hospital form is also used to prevent and treat infections around surgery. It offers broader cover than basic penicillins for some infections, but because cephalosporins share chemistry with penicillins, allergy history is checked carefully before it is given.
How it works
Like the penicillins, cefuroxime kills bacteria by stopping them building their cell walls, so the bacteria break apart and die. Its particular structure makes it more resistant to some of the enzymes bacteria use to inactivate penicillins, which is why it can work against certain infections that simpler penicillins cannot.
Company & origin
Originated / developed by: Glaxo.
A second-generation cephalosporin developed by Glaxo in the UK in the 1970s, with the oral form (cefuroxime axetil) introduced as Zinnat.
Practical use
How to take Cefuroxime
General, dose-free guidance — always follow your prescriber's and the leaflet's specific instructions.
- Take the oral form with food, which helps it be absorbed and work well.
- Space the doses evenly through the day as directed.
- Complete the whole course even once you feel better, unless told otherwise.
- Tell your prescriber about any previous reaction to penicillin or cephalosporin antibiotics, as there can be cross-allergy.
- Report severe or persistent diarrhoea, which can occasionally signal a gut infection.
Weighing it up
Advantages & disadvantages of Cefuroxime
Advantages
- Covers a useful range of common chest, urine, ear, sinus and skin infections.
- More resistant than basic penicillins to some bacterial enzymes, so it works where they may not.
- Available both as a tablet or liquid to take by mouth and as a hospital form for surgery and serious infections.
Disadvantages
- Related to penicillin, so it can cause an allergic reaction in some people with penicillin allergy.
- Like broad antibiotics, it can disturb the gut and, rarely, lead to a Clostridioides difficile infection.
- Oral absorption depends on taking it with food, and overuse contributes to antibiotic resistance.
Practical use
Good to know
The oral form is best taken with food, which improves how much is absorbed. Because cefuroxime is a cephalosporin, there is a small chance of cross-reaction in people allergic to penicillin, so any previous penicillin reaction must be mentioned. As with all antibiotics, the full course should be completed even after you feel better.
Who should not take it / use with caution
- Anyone who has had a serious allergic reaction (such as swelling or anaphylaxis) to a cephalosporin antibiotic.
- Used with caution, or avoided, in people who have had a severe allergic reaction to penicillin, because of possible cross-reaction.
- Used with caution in significant kidney impairment, where treatment may be adjusted.
Monitoring
- Mainly clinical — confirming the infection improves and watching for allergic reactions or diarrhoea.
- Kidney function in people with existing kidney problems or on longer courses.
- Blood counts with prolonged treatment, and closer clotting checks if taken with warfarin.
Side effects
- Diarrhoea, nausea and thrush are the most common.
- Skin rash; a widespread rash with swelling or breathlessness needs urgent attention as it may be an allergic reaction.
- Rarely, severe or persistent diarrhoea from a gut infection (Clostridioides difficile), or changes in blood counts and liver tests on longer treatment.
Key interactions
- Medicines that reduce stomach acid can lower the absorption of the oral form.
- Can affect clotting control with warfarin, so monitoring may be needed.
- Used with care alongside other medicines that can affect the kidneys.
Available as: Tablets and an oral suspension (liquid) for use by mouth; a separate form is given by injection or drip in hospital.
Answers
Cefuroxime: frequently asked questions
Can I take cefuroxime if I am allergic to penicillin?
It depends on your reaction. Cephalosporins like cefuroxime are chemically related to penicillins, so there is a small chance of cross-reaction. People who have had a severe penicillin allergy (such as swelling or anaphylaxis) usually avoid it, while those with a milder past reaction may be able to take it under guidance. Always tell your prescriber the details.
Should cefuroxime be taken with food?
Yes, the oral form is best taken with food. Food improves how much of the antibiotic is absorbed, helping it work properly against your infection. Spacing the doses evenly through the day also keeps a steady level in your body.
How is cefuroxime different from amoxicillin?
Both stop bacteria building their cell walls, but cefuroxime is a cephalosporin rather than a penicillin. Its structure makes it more resistant to some bacterial enzymes, so it can treat certain infections that amoxicillin cannot. The choice depends on the infection and your allergy history.
Why must I finish the whole course?
Stopping early can leave some bacteria alive, allowing the infection to return and making resistance more likely. Completing the full course, even after you feel better, gives the best chance of fully clearing the infection.
What is the difference between cefuroxime and Zinnat?
They are the same medicine — cefuroxime is the active-ingredient name and Zinnat is a brand name for the oral form (cefuroxime axetil). Generic cefuroxime contains the identical active ingredient.
The wider class
About Cephalosporins
Cefuroxime belongs to the cephalosporins class. For how the class as a whole works, its shared safety principles and monitoring, see the full guide.
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Authoritative sources
- BNF: Cefuroxime.
- NICE CKS: Cefuroxime.
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