The text only version may be available in large print, Braille or audio CD. For further information call emc accessibility on 0800 198 5000. The product code(s) for this leaflet is: PL 29831/0092.
Flucloxacillin 250mg, 500mg, & 1g Powder for Solution for Injection or Infusion
Flucloxacillin 250mg, 500mg and 1g Powder for Solution for Injection or Infusion
The name of your medicine is Flucloxacillin 250mg, 500mg and 1g Powder for Solution for Injection or Infusion. In the rest of this leaflet it is called Flucloxacillin Injection.
1. What Flucloxacillin Injection is and what it is used for
2. What you need to know before you use Flucloxacillin Injection
3. How to use Flucloxacillin Injection
4. Possible side effects
5. How to store Flucloxacillin Injection
6. Contents of the pack and other information
Flucloxacillin belongs to a group of medicines called penicillins, which are antibiotics. These medicines work by killing bacteria that cause infections.
Flucloxacillin Injection is used for the treatment of a range of bacterial infections including bone infections (osteomyelitis) and infections within the lining of the heart (endocarditis). It is also used to prevent infections that can occur during major surgical operations such as heart and lung operations (cardiothoracic surgery) and bone, joint and muscle operations (orthopaedic surgery).
Talk to your doctor before using Flucloxacillin Injection:
The use of flucloxacillin, especially in high doses, may reduce the potassium levels in the blood (hypokalaemia). Your doctor may measure your potassium levels regularly during the therapy with higher doses of flucloxacillin.
There is a risk of blood and fluid abnormality (high anion gap metabolic acidosis) which occurs when there is an increase in plasma acidity, when flucloxacillin is used concomitantly with paracetamol, particularly in certain groups of patients at risk, e.g. patients with severe renal impairment, sepsis or malnutrition, especially if the maximum daily doses of paracetamol are used. High anion gap metabolic acidosis is a serious disease that must have urgent treatment.
Special care should be taken in newborn babies to avoid overdose or high levels of a chemical in the blood which can lead to brain damage.
If any of the above statements apply to you, speak to your doctor or nurse before you are given Flucloxacillin Injection.
Taking other medicine while you are being given Flucloxacillin Injection can affect how it or the other medicine works. Tell your doctor if you are taking, have recently taken or might take any other medicines.
Please particularly check with your doctor if you are taking or need to take any of the following:
Flucloxacillin Injection may interfere with various laboratory tests.
If you have any doubts about whether you should be given this medicine then talk to your doctor.
You should let your doctor know immediately if you are pregnant or trying for a baby before this medicine is administered.
You should not breast-feed whilst being given Flucloxacillin Injection. You should let your doctor know if you are breast-feeding while you are having treatment with Flucloxacillin Injection.
Flucloxacillin Injection is not known to affect your ability to drive or use machines.
Flucloxacillin Injection 250mg contains less than 1mmol sodium (23mg) per vial i.e. essentially sodium free.
Flucloxacillin Injection 500mg and 1g contain 1.13mmol and 2.26mmol of sodium per vial respectively. To be taken into consideration by patients on a controlled sodium diet.
Your doctor or nurse will prepare your injection by mixing the Flucloxacillin Injection powder with a liquid such as water for injections, either in the vial or in another container. The mixture is usually injected into a muscle, or into a vein when it will be given slowly over three to four minutes using a syringe or drip (infusion). In certain circumstances Flucloxacillin Injection can be injected directly into an infected joint or the chest wall, or breathed in as a mist.
Flucloxacillin is usually given as an intramuscular injection, slow intravenous injection and intravenous infusion. It may also be given by articular or intrapleural injection or inhaled. Flucloxacillin should not be given into the eye or the spine.
The recommended dose by intramuscular injection or infusion is 250mg every six hours. The recommended adult dose by intravenous injection is 250mg to 1g every six hours. These doses may be doubled in severe infections.
Doses of up to 8g a day may be required for osteomyelitis or endocarditis. To prevent surgical infections you will be given 1 to 2g with your anaesthetic followed by 500mg every six hours.
The recommended dose for children aged two to ten years is half the adult dose. The recommended dose for children under two years old is a quarter of the adult dose.
Special care should be taken in newborn babies to prevent the risk of overdosing.
The usual doses are:
If you have severe kidney failure you may be given a lower dose or you may receive your doses less frequently.
Your doctor will decide the dose that is best for you. If you do not understand, or are in any doubt, ask your doctor or nurse.
A doctor or nurse will give you this medicine. If you think you may have received too much Flucloxacillin Injection, please tell your doctor or nurse immediately. Symptoms of an overdose may include fits, behaviour disorders, fever, weakness, breathlessness, bleeding more easily and longer than usual, or changes to the salt levels in the blood.
A doctor or a nurse will give you this medicine. If you think you have missed a dose, please tell your doctor or nurse.
If you have any further questions on the use of this medicine, ask your doctor or nurse.
Like all medicines, this medicine can cause side effects, although not everybody gets them.
Also tell your doctor immediately if you develop any of the following:
Hepatitis (inflammation of the liver) and jaundice may be long lasting. They are more likely in the elderly or patients who have been given flucloxacillin for more than two weeks.
You should tell your doctor if you develop any of the symptoms above, even if they occur some weeks after you have stopped having the injections.
Other side effects include:
Very rare (may affect up to 1 in 10,000 people):
Very rare cases of blood and fluid abnormality (high anion gap metabolic acidosis) which occurs when there is an increase in plasma acidity, when flucloxacillin is used concomitantly with paracetamol, generally in the presence of risk factors (see section 2).
Not known (cannot be estimated from the available data):
Patients who have syphilis or leptospirosis (Weil’s disease) have occasionally suffered from a type of reaction (Jarisch-Herxheimer reaction) shortly after their injection, with fever, chills, headache and sometimes heart or eye problems.
Your doctor may take blood tests during your treatment to check your liver, kidneys and blood, particularly if you receive high doses or a long course of treatment.
If you get any side effects, talk to your doctor, pharmacist or nurse. This includes any possible side effects not listed in this leaflet. You can also report side effects directly via the Yellow Card Scheme www.mhra.gov.uk/yellowcard
By reporting side effects you can help provide more information on the safety of this medicine.
Keep this medicine out of the sight and reach of children.
Do not throw away any medicines via wastewater or household waste. Ask your pharmacist how to throw away medicines you no longer use. These measures will help protect the environment.
The active substance is flucloxacillin as sodium flucloxacillin monohydrate.
There are no other ingredients.
Flucloxacillin Injection is a white or almost white powder for solution for injection/infusion. Fluclozacillin Injection is supplied in glass vials fitted with a grey bromobutyl rubber stopper.
Flucoxacillin 250mg Injection: The vials are sealed with an aluminium crimped green flip-off cap.
Flucoxacillin 500mg Injection: The vials are sealed with an aluminium crimped red flip-off cap.
Flucoxacillin 1000mg Injection: The vials are sealed with an aluminium crimped blue flip-off cap.
Flucloxacillin Injection is available in packs of 10 vials.
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Product name Reference number
Flucloxacillin 250mg Powder for Solution for Injection or Infusion PL 29831/0091
Flucloxacillin 500mg Powder for Solution for Injection or Infusion PL 29831/0092
Flucloxacillin 1g Powder for Solution for Injection or Infusion PL 29831/0093
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This leaflet was last revised in 05/2023.