An oral antibiotic similar to cephalosporins
Loracarbef
An oral antibiotic, similar to cephalosporins, used for bacterial infections.
What is Loracarbef?
Loracarbef is an oral antibiotic that is closely related to the cephalosporins (it belongs to a group called carbacephems), used to treat bacterial infections such as those of the chest, ear, sinuses and urinary tract. It works by killing bacteria. Because it is cephalosporin-like, people with a penicillin allergy can occasionally react to it as well (cross-allergy). Like other antibiotics it can cause diarrhoea and, less commonly, a serious bowel infection called Clostridioides difficile (C. difficile). It is largely obsolete and is not in routine use in the UK.
Education and reference only. This is a plain-language guide to Loracarbef — 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
Loracarbef is an antibiotic taken by mouth. It belongs to a group called the carbacephems, which are very closely related to the cephalosporins, themselves relatives of penicillin. It has been used to treat common bacterial infections, including those of the chest, ear, sinuses, throat and urinary tract. It works against bacteria rather than viruses, so it does not help colds or flu. It is now largely obsolete and is not one of the antibiotics in routine use in the UK, where other agents are preferred.
How it works
Loracarbef kills bacteria by interfering with their ability to build and maintain their cell walls. Without a sound cell wall, the bacteria cannot survive, so the infection is cleared. Because it works in the same way as the cephalosporins and penicillins, it shares their family traits, including the possibility that someone allergic to penicillin may also react to it. Like all antibiotics, it acts only against bacteria, not viruses, and using it when it is not needed contributes to bacteria becoming resistant.
Company & origin
Originated / developed by: Generic (largely withdrawn).
An oral antibiotic of the carbacephem group, closely related to cephalosporins; it is largely obsolete and not in routine use in the UK.
Practical use
How to take Loracarbef
General, dose-free guidance — always follow your prescriber's and the leaflet's specific instructions.
- Take it by mouth exactly as prescribed, spacing the doses out evenly through the day.
- Tell your prescriber about any allergy to penicillin or cephalosporins before taking it, as a cross-reaction is possible.
- Finish the full course even if you feel better, unless told otherwise, to help clear the infection and limit resistance.
- Report severe, watery or persistent diarrhoea promptly, and do not treat it yourself with anti-diarrhoea medicines.
- Remember it works only against bacterial infections, not colds, flu or other viral illnesses.
Weighing it up
Advantages & disadvantages of Loracarbef
Advantages
- An oral antibiotic that can treat a range of common bacterial infections.
- Taken by mouth rather than by injection.
- Related to the well-understood cephalosporin family of antibiotics.
Disadvantages
- People allergic to penicillin or cephalosporins may also react to it.
- Like other antibiotics, it can cause diarrhoea and, less commonly, a serious C. difficile bowel infection.
- It is largely obsolete and not in routine use in the UK.
Practical use
Good to know
Two practical points matter most with loracarbef. First, because it is closely related to the cephalosporins and, more distantly, to penicillin, people with a penicillin allergy can sometimes react to it as well, so it is important to tell your prescriber about any antibiotic allergy. Second, like other antibiotics it can upset the gut and, less commonly, lead to a serious bowel infection called C. difficile, which causes severe or watery diarrhoea that should be reported promptly rather than treated with anti-diarrhoea remedies. It only works against bacteria, so it is no use for colds or flu, and finishing the course as prescribed helps prevent resistance. In practice it is largely obsolete and is not in routine use in the UK.
Who should not take it / use with caution
- People who have had a serious allergic reaction to loracarbef or cephalosporins should not take it.
- It is used with caution, or avoided, in people with a known penicillin allergy because of the risk of cross-reaction.
- It is used with care in people with kidney problems, who may need adjustments.
- Tell your prescriber if you have had bowel problems such as colitis with antibiotics before.
Monitoring
- Reviewing whether the infection is responding to treatment.
- Watching for allergic reactions, especially in people with other antibiotic allergies.
- Being alert to severe or watery diarrhoea that could mean a C. difficile infection.
Side effects
- Diarrhoea, nausea or stomach upset.
- Thrush (a yeast infection) in some people after a course of antibiotics.
- Allergic reactions such as rash or itching, and, rarely, serious allergic reactions needing urgent help.
- Less commonly, a serious bowel infection (C. difficile) causing severe or watery diarrhoea, which needs prompt medical attention.
Key interactions
- Tell your prescriber about all your medicines, as antibiotics can interact with some of them.
- Some antacids or other medicines can affect how it is absorbed, so check before combining.
- It can occasionally affect the results of certain laboratory tests, so labs should know you are taking it.
Available as: Capsules and an oral liquid taken by mouth.
Answers
Loracarbef: frequently asked questions
What is loracarbef used for?
It is an oral antibiotic, similar to cephalosporins, that has been used to treat bacterial infections such as those of the chest, ear, sinuses, throat and urinary tract.
Can I take it if I am allergic to penicillin?
Because it is closely related to cephalosporins and, more distantly, to penicillin, people with a penicillin allergy can sometimes react to it too, so tell your prescriber about any antibiotic allergy.
Why might it cause diarrhoea?
Antibiotics can upset the balance of bacteria in the gut; less commonly this leads to a serious infection called C. difficile, so report severe or watery diarrhoea promptly.
Will it help a cold or flu?
No. Loracarbef works only against bacteria, so it does not help colds, flu or other viral infections.
Is it still used?
It is largely obsolete and is not in routine use in the UK, where other antibiotics are preferred.
The wider class
About Carbacephem antibiotic (cephalosporin-like)
Loracarbef belongs to the carbacephem antibiotic (cephalosporin-like) 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
- NICE CKS
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