Table of Contents
- What is Flucloxacillin?
- What Conditions Does Flucloxacillin Treat?
- How is Flucloxacillin Administered?
- Flucloxacillin Compared to Other Antibiotics
- Potential Side Effects
- Ongoing Research
What is Flucloxacillin?
Flucloxacillin is an antibiotic medication used to treat various bacterial infections. It belongs to a class of antibiotics called penicillins, specifically the isoxazolyl penicillins. These antibiotics are designed to be resistant to breakdown by certain bacteria that have developed ways to fight off regular penicillin[1].
Flucloxacillin is also known by other names, including:
- Floxapen
- Fluclomix
- Ladropen
These alternative names may be used in different countries or by different manufacturers[2].
What Conditions Does Flucloxacillin Treat?
Flucloxacillin is primarily used to treat infections caused by certain types of bacteria, especially those that have become resistant to regular penicillin. Some of the conditions it can treat include:
- Cellulitis: An infection of the skin and underlying tissues[3]
- Wound infections: Infections that occur in cuts, scrapes, or surgical wounds[3]
- Abscesses: Pockets of pus that can form in various parts of the body[3]
- Staphylococcus aureus infections: Including bloodstream infections caused by this bacteria[4]
These conditions are often referred to as “acute bacterial skin and skin structure infections” (ABSSSIs) in medical terms[3].
How is Flucloxacillin Administered?
Flucloxacillin can be given in several ways, depending on the severity of the infection and the patient’s condition:
- Oral capsules: For less severe infections, flucloxacillin may be given as capsules to be taken by mouth. The typical dose is 500mg taken four times a day[3].
- Intravenous (IV) infusion: For more serious infections, flucloxacillin can be given directly into a vein. This is often done in a hospital setting. The dose may vary, but it’s commonly given as 2g every 6 hours for adults[1].
The duration of treatment can vary from a few days to several weeks, depending on the type and severity of the infection[1].
Flucloxacillin Compared to Other Antibiotics
Researchers are constantly studying how flucloxacillin compares to other antibiotics in treating various infections. Some key comparisons include:
- Flucloxacillin vs. Benzylpenicillin: Some studies are looking at whether benzylpenicillin might be more effective than flucloxacillin for certain types of Staphylococcus aureus infections[4].
- Flucloxacillin vs. Ceftriaxone: In some cases, ceftriaxone (another type of antibiotic) may be used instead of flucloxacillin, especially for home-based treatment of cellulitis in children[1].
- Flucloxacillin alone vs. Flucloxacillin with other antibiotics: Some research is investigating whether adding other antibiotics to flucloxacillin treatment might be more effective for certain infections[3].
Potential Side Effects
Like all medications, flucloxacillin can cause side effects in some people. Some potential side effects that are being monitored in clinical trials include:
- Liver problems: In rare cases, flucloxacillin can affect liver function. Doctors may monitor liver enzymes during treatment[2].
- Kidney issues: Some patients may experience changes in kidney function[2].
- Phlebitis: This is inflammation of a vein, which can sometimes occur with IV administration[2].
- Changes in blood cell counts: In some cases, flucloxacillin might affect the levels of certain blood cells[2].
It’s important to discuss any concerns about side effects with your healthcare provider.
Ongoing Research
Scientists are continually studying flucloxacillin to better understand its effects and improve its use. Some areas of current research include:
- Optimal dosing: Researchers are studying the best ways to administer flucloxacillin, including dosage amounts and frequency[5].
- Combination therapies: Studies are looking at whether combining flucloxacillin with other antibiotics might be more effective for certain infections[2].
- Home vs. hospital treatment: Some research is comparing the effectiveness of treating certain infections with flucloxacillin at home versus in the hospital[1].
- Effects on gut bacteria: Scientists are investigating how flucloxacillin might affect the balance of bacteria in the digestive system[1].
These ongoing studies help doctors better understand how to use flucloxacillin effectively and safely in different situations.







