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ZOFRAN FLEXI-AMP INJECTION 2MG/ML
Active substance(s): ONDANSETRON HYDROCHLORIDE DIHYDRATE
Zofran® Flexi-amp® injection
Package Leaflet: Information for the Physician
Please refer to the Summary of Product Characteristics (SPC) for further details on this product.
Trade Name of the Medicinal Product
Zofran Flexi-amp Injection
Qualitative and Quantitative Composition
Zofran injection 2 mg/ml:
• 2 ml ampoules each containing 4 mg ondansetron (as hydrochloride dihydrate) in aqueous solution for intramuscular or intravenous administration.
• 4 ml ampoules each containing 8 mg ondansetron (as hydrochloride dihydrate) in aqueous solution for intravenous or intramuscular administration.
Posology and Method of Administration
Chemotherapy and Radiotherapy induced nausea and vomiting
The emetogenic potential of cancer treatment varies according to the doses and combinations of chemotherapy and radiotherapy regimens used. The route of
administration and dose of Zofran should be flexible in the range of 8-32 mg a day and selected as shown below.
Emetogenic chemotherapy and radiotherapy: Zofran can be given either by rectal, oral (tablets or syrup), intravenous or intramuscular administration. For most patients
receiving emetogenic chemotherapy or radiotherapy, Zofran 8 mg should be administered as a slow intravenous injection (in not less than 30 seconds) or intramuscular
injection immediately before treatment, followed by 8 mg orally twelve hourly. To protect against delayed or prolonged emesis after the first 24 hours, oral or rectal
treatment with Zofran should be continued for up to 5 days after a course of treatment.
Highly emetogenic chemotherapy: For patients receiving highly emetogenic chemotherapy, e.g. high-dose cisplatin, Zofran can be given either by rectal, intravenous or
intramuscular administration. Zofran has been shown to be equally effective in the following dose schedules over the first 24 hours of chemotherapy:
• A single dose of 8 mg by slow intravenous injection (in not less than 30 seconds) or intramuscular injection immediately before chemotherapy.
• A dose of 8 mg by slow intravenous injection (in not less than 30 seconds) or intramuscular injection immediately before chemotherapy, followed by two further
intravenous injections (in not less than 30 seconds) or intramuscular doses of 8 mg four hours apart, or by a constant infusion of 1 mg/hour for up to 24 hours.
• A maximum initial dose of 16 mg diluted in 50-100 ml of saline or other compatible infusion fluid (See Instructions for Use/Handling) and infused over not less than 15
minutes immediately before chemotherapy. The initial dose of Zofran may be followed by two additional 8 mg intravenous doses (in not less than 30 seconds) or
intramuscular doses four hours apart.
• A single dose greater than 16 mg must not be given due to dose dependent increase of QT-prolongation risk (see sections 4.4, 4.8 and 5.1 of the SPC).
The selection of dose regimen should be determined by the severity of the emetogenic challenge.
The efficacy of Zofran in highly emetogenic chemotherapy may be enhanced by the addition of a single intravenous dose of dexamethasone sodium phosphate, 20 mg
administered prior to chemotherapy.
To protect against delayed or prolonged emesis after the first 24 hours, oral or rectal treatment with Zofran should be continued for up to 5 days after a course of
CINV in children aged ≥ 6 months and adolescents
The dose for CINV can be calculated based on body surface area (BSA) or weight – see below.
Zofran injection should be diluted in 5% dextrose or 0.9% sodium chloride or other compatible infusion fluid (see Instructions for Use/Handling) and infused intravenously
over not less than 15 minutes.
There are no data from controlled clinical trials on the use of Zofran in the prevention of delayed or prolonged CINV. There are no data from controlled clinical trials on the
use of Zofran for radiotherapy-induced nausea and vomiting in children.
Dosing by BSA:
Zofran should be administered immediately before chemotherapy as a single intravenous dose of 5 mg/m2. The single intravenous dose must not exceed 8 mg. Oral dosing
can commence 12 hours later and may be continued for up to 5 days (see SPC for dosing tables). The total dose over 24 hours (given as divided doses) must not exceed
adult dose of 32 mg.
Dosing by bodyweight:
Weight-based dosing results in higher total daily doses compared to BSA-based dosing. Zofran should be administered immediately before chemotherapy as a single
intravenous dose of 0.15 mg/kg. The single intravenous dose must not exceed 8 mg. Two further intravenous doses may be given in 4-hourly intervals.
Zofran® Flexi-amp® injection 2 mg/ml
ondansetron (as hydrochloride dihydrate)
Read all of this leaflet carefully before you start taking this medicine because it contains
important information for you.
• Keep this leaflet. You may need to read it again.
• If you have any further questions about your illness or your medicine, ask your doctor, nurse or pharmacist.
• This medicine has been prescribed for you only. Do not pass it on to others. It may harm them, even if their
symptoms are the same as yours.
• If any of the side effects get serious, or if you notice any side effects not listed in this leaflet, please tell your doctor,
nurse or pharmacist. This includes any possible side effects not listed in this leaflet. See section 4.
What is in this leaflet:
What Zofran injection is and what it is used for
What you need to know before you have Zofran injection
How to have Zofran injection
Possible side effects
How to store Zofran injection
Contents of the pack and other information
1 What Zofran injection is and what it is used for
Zofran injection contains a medicine called ondansetron. This belongs to a group of
medicines called anti-emetics.
Zofran injection is used for:
• preventing nausea and vomiting caused by chemotherapy (in adults and children) or
radiotherapy for cancer (adults only)
• preventing nausea and vomiting after surgery.
Ask your doctor, nurse or pharmacist if you would like any further explanation about these uses.
2 What you need to know before you have Zofran injection
Do not have Zofran injection if:
• you are taking apomorphine (used to treat Parkinson’s disease)
• you are allergic (hypersensitive) to ondansetron or any of the other ingredients in Zofran injection (listed in
If you are not sure, talk to your doctor, nurse or pharmacist before having Zofran injection.
Warnings and precautions
Check with your doctor, nurse or pharmacist before having Zofran injection if:
• you have ever had heart problems (e.g. congestive heart failure which causes shortness of breath and swollen ankles)
• you have an uneven heart beat (arrhythmias)
• you are allergic to medicines similar to ondansetron, such as granisetron or palonosetron
• you have liver problems
• you have a blockage in your gut
• you have problems with the levels of salts in your blood, such as potassium, sodium and magnesium.
If you are not sure if any of the above apply to you, talk to your doctor, nurse or pharmacist before having Zofran injection.
Other medicines and Zofran
Please tell your doctor, nurse or pharmacist if you are taking, or have recently taken, or might take any other medicines.
This includes medicines that you buy without a prescription and herbal medicines. This is because Zofran can affect the
way some medicines work. Also some other medicines can affect the way Zofran works.
In particular, tell your doctor, nurse or pharmacist if you are taking any of the following medicines:
• carbamazepine or phenytoin used to treat epilepsy
• rifampicin used to treat infections such as tuberculosis (TB)
• antibiotics such as erythromycin or ketoconazole
• anti-arrhythmic medicines used to treat an uneven heart beat
• beta-blocker medicines used to treat certain heart or eye problems, anxiety or prevent migraines
• tramadol, a pain killer
• medicines that affect the heart (such as haloperidol or methadone)
• cancer medicines (especially anthracyclines and trastuzumab).
• SSRIs (selective serotonin reuptake inhibitors) used to treat depression and/or anxiety including fluoxetine,
paroxetine, sertraline, fluvoxamine, citalopram, escitalopram
• SNRIs (serotonin noradrenaline reuptake inhibitors) used to treat depression and/or anxiety including venlafaxine,
If you are not sure if any of the above applies to you, talk to your doctor, nurse or pharmacist before having Zofran
Zofran injection should not be given in the same syringe or infusion (drip) as any other medication.
Pregnancy and breast-feeding
It is not known if Zofran is safe during pregnancy. If you are pregnant, think you are pregnant or are planning to have a
baby, ask your doctor or pharmacist for advice before having Zofran injection.
Do not breast-feed if you have Zofran. This is because small amounts pass into the mother’s milk. Ask your doctor or
midwife for advice.
Important information about some of the ingredients of Zofran injection
This medicine contains sodium citrate and sodium chloride. This means that Zofran injection contains 7 mg of sodium per
4 mg dose, which is less than 1 mmol sodium (23 mg) per dose i.e. essentially “sodium-free”.
3 How to have Zofran injection
Zofran injection is normally given by a nurse or doctor. The dose you have been prescribed will depend on the treatment
you are having.
To prevent nausea and vomiting from chemotherapy or radiotherapy in adults
On the day of chemotherapy or radiotherapy
• the usual adult dose is 8 mg given by a slow injection into your vein or muscle, just before your treatment, and
another 8 mg twelve hours later. After chemotherapy, your medicine will usually be given by mouth as an 8 mg
Zofran tablet or 10 ml (8 mg) Zofran syrup.
On the following days
• the usual adult dose is one 8 mg tablet or 10 ml (8 mg) syrup taken twice a day
• this may be given for up to 5 days.
If your chemotherapy or radiotherapy is likely to cause severe nausea and vomiting, you may be given more than the
usual dose of Zofran. Your doctor will decide this.
To prevent nausea and vomiting from chemotherapy in children aged over 6 months and adolescents
The doctor will decide the dose depending on the child’s size (body surface area) or weight. Look at the label for more
Oral dosing can commence 12 hours later and may be continued for up to 5 days. The total dose over 24 hours (given as divided doses) must not exceed adult dose of 32
mg. (see SPC for further details).
In patients 65 to 74 years of age, the dose schedule for adults can be followed. All intravenous doses should be diluted in 50-100 ml of saline or other compatible
infusion fluid (see Instructions for Use/Handling) and infuse over 15 minutes.
In patients 75 years of age or older, the initial intravenous dose of Zofran should not exceed 8 mg. All intravenous doses should be diluted in 50-100 ml of saline or
other compatible infusion fluid (see Instructions for Use/Handling) and infused over 15 minutes. The initial dose of 8 mg may be followed by two further intravenous doses
of 8 mg, infused over 15 minutes and given no less than four hours apart (see SPC).
Post-Operative Nausea and Vomiting (PONV)
For the prevention of PONV Zofran can be administered orally or by intravenous or intramuscular injection. Zofran may be administered as a single dose of 4 mg given by
intramuscular or slow intravenous injection at induction of anaesthesia. For treatment of established PONV a single dose of 4 mg given by intramuscular or slow
intravenous injection is recommended.
Children (aged over 1 month and adolescents)
For prevention of PONV in paediatric patients having surgery performed under general anaesthesia, a single dose of Zofran may be administered by slow intravenous injection
(not less than 30 seconds) at a dose of 0.1 mg/kg up to a maximum of 4 mg either prior to, at or after induction of anaesthesia. For the treatment of PONV after surgery in
paediatric patients, having surgery performed under general anaesthesia, a single
dose of ondansetron may be administered by slow intravenous injection (not less
than 30 seconds) at a dose of 0.1 mg/kg up to a maximum of 4 mg. There are no data
on the use of Zofran in the treatment of PONV in children below 2 years of age.
There is limited experience in the use of Zofran in the prevention and treatment of
PONV in the elderly, however Zofran is well tolerated in patients over 65 years
For all indications:
No alteration of daily dosage or frequency of dosing, or route of administration are
Clearance of Zofran is significantly reduced and serum half-life significantly prolonged in subjects with moderate or severe impairment of hepatic function. In such patients
a total daily dose of 8 mg should not be exceeded.
Poor sparteine/debrisoquine metabolism
The elimination half-life of ondansetron is not altered in subjects classified as poor metabolisers of sparteine and debrisoquine. Consequently in such patients repeat
dosing will give drug exposure levels no different from those of the general population. No alteration of daily dosage or frequency of dosing are required.
Special precautions for disposal and other handling
Zofran Flexi-amp injection should not be autoclaved.
Compatibility with intravenous fluids
Zofran injection should only be admixed with those infusion solutions which are recommended:
• Sodium Chloride Intravenous Infusion BP 0.9% w/v
• Glucose Intravenous Infusion BP 5% w/v
• Mannitol Intravenous Infusion BP 10% w/v
• Ringers Intravenous Infusion
• Potassium Chloride 0.3% w/v and Sodium Chloride 0.9% w/v Intravenous Infusion BP
• Potassium Chloride 0.3% w/v and Glucose 5% w/v Intravenous Infusion BP
In keeping with good pharmaceutical practice dilutions of Zofran injection in intravenous fluids should be prepared at the time of infusion or stored at 2-8°C for no more
than 24 hours before the start of administration.
Compatibility studies have been undertaken in polyvinyl chloride infusion bags and polyvinyl chloride administration sets. It is considered that adequate stability would also
be conferred by the use of polyethylene infusion bags or Type 1 glass bottles. Dilutions of Zofran in sodium chloride 0.9% w/v or in glucose 5% w/v have been demonstrated
to be stable in polypropylene syringes. It is considered that Zofran injection diluted with other compatible infusion fluids would be stable in polypropylene syringes.
Compatibility with other drugs
Zofran may be administered by intravenous infusion at 1 mg/hour, e.g. from an infusion bag or syringe pump. The following drugs may be administered via the Y-site of the
Zofran giving set for ondansetron concentrations of 16 to 160 micrograms/ml (e.g. 8 mg/500 ml and 8 mg/50 ml respectively);
Cisplatin: Concentrations up to 0.48 mg/ml (e.g. 240 mg in 500 ml) administered over one to eight hours.
5-Fluorouracil: Concentrations up to 0.8 mg/ml (e.g. 2.4 g in 3 litres or 400 mg in 500 ml) administered at a rate of at least 20 ml per hour (500 ml per 24 hours). Higher
concentrations of 5-fluorouracil may cause precipitation of ondansetron. The 5-fluorouracil infusion may contain up to 0.045% w/v magnesium chloride in addition to
other excipients shown to be compatible.
Carboplatin: Concentrations in the range 0.18 mg/ml to 9.9 mg/ml (e.g. 90 mg in 500 ml to 990 mg in 100 ml), administered over ten minutes to one hour.
Etoposide: Concentrations in the range 0.14 mg/ml to 0.25 mg/ml (e.g. 72 mg in 500 ml to 250 mg in 1 litre), administered over thirty minutes to one hour.
Ceftazidime: Doses in the range 250 mg to 2000 mg reconstituted with Water for Injections BP as recommended by the manufacturer (e.g. 2.5 ml for 250 mg and 10 ml for
2 g ceftazidime) and given as an intravenous bolus injection over approximately five minutes.
Cyclophosphamide: Doses in the range 100 mg to 1 g, reconstituted with Water for Injections BP, 5 ml per 100 mg cyclophosphamide, as recommended by the
manufacturer and given as an intravenous bolus injection over approximately five minutes.
Doxorubicin: Doses in the range 10-100 mg reconstituted with Water for Injections BP, 5 ml per 10 mg doxorubicin, as recommended by the manufacturer and given as an
intravenous bolus injection over approximately 5 minutes.
Dexamethasone: Dexamethasone sodium phosphate 20 mg may be administered as a slow intravenous injection over 2-5 minutes via the Y-site of an infusion set
delivering 8 or 16 mg of ondansetron diluted in 50-100 ml of a compatible infusion fluid over approximately 15 minutes. Compatibility between dexamethasone sodium
phosphate and ondansetron has been demonstrated supporting administration of these drugs through the same giving set resulting in concentrations in line of
32 microgram - 2.5 mg/ml for dexamethasone sodium phosphate and 8 microgram - 1 mg/ml for ondansetron.
• 36 months (unopened)
• 24 hours (dilutions stored 2-8°C)
Special Precautions for Storage
• Protect from light
• Store below 30°C
Dilutions of Zofran injection in compatible intravenous infusion fluids are stable under normal room lighting conditions or daylight for at least 24 hours, thus no protection
from light is necessary while infusion takes place.
Leaflet date: May 2016
On the day of chemotherapy
• the first dose is given by an injection into the vein, just before your child’s treatment. After chemotherapy, your
child’s medicine will usually be given by mouth twelve hours later, as Zofran syrup or a Zofran tablet.
On the following days
• 2.5 ml (2 mg) syrup twice a day for small children and those weighing 10 kg or less
• one 4 mg tablet or 5 ml (4 mg) syrup twice a day for larger children and those weighing more than 10 kg
• two 4 mg tablets or 10 ml (8 mg) syrup twice a day for teenagers (or those with a large body surface area)
• these doses can be given for up to five days
To prevent and treat nausea and vomiting after an operation
• The usual dose for adults is 4 mg given by a slow injection into your vein or an injection into your muscle. For
prevention, this will be given just before your operation.
• For children aged over 1 month and adolescents the doctor will decide the dose. The maximum dose is 4 mg given as
a slow injection into the vein. For prevention, this will be given just before the operation.
Patients with moderate or severe liver problems
The total daily dose should not be more than 8 mg.
If you keep feeling or being sick
Zofran injection should start to work soon after having the injection. If you continue to
be sick or feel sick, tell your doctor or nurse.
If you have more Zofran injection than you should
Your doctor or nurse will give you or your child Zofran injection so it is unlikely that
you or your child will receive too much. If you think you or your child have been given
too much or have missed a dose, tell your doctor or nurse.
4 Possible side effects
Like all medicines, Zofran injection can cause side effects, although not everybody gets
If you have an allergic reaction, tell your doctor or a member of the medical staff straight away. The signs may include:
• sudden wheezing and chest pain or chest tightness
• swelling of your eyelids, face, lips, mouth or tongue
• skin rash - red spots or lumps under your skin (hives) anywhere on your body
Other side effects include:
Very common (may affect more than 1 in 10 people)
Common (may affect up to 1 in 10 people)
• a feeling of warmth or flushing
• changes to liver function test results (if you have Zofran injection with a medicine called cisplatin, otherwise this side
effect is uncommon)
• irritation and redness at the site of injection.
Uncommon (may affect up to 1 in 100 people)
low blood pressure, which can make you feel faint or dizzy
uneven heart beat
unusual body movements or shaking.
Rare (may affect up to 1 in 1,000 people)
• feeling dizzy or light headed
• blurred vision
• disturbance in heart rhythm (sometimes causing a sudden loss of consciousness)
Very rare (may affect up to 1 in 10,000 people)
• poor vision or temporary loss of eyesight, which usually comes back within 20 minutes.
Reporting of side effects
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 at: www.mhra.gov.uk/yellowcard.
By reporting side effects you can help provide more information on the safety of this medicine.
5 How to store Zofran injection
• Keep this medicine out of the sight and reach of children.
• Do not use Zofran injection after the expiry date which is stated on the pack after ‘EXP’. The expiry date refers to the
last day of that month.
• Store Zofran injection below 30°C. Protect from light.
• When Zofran injection is diluted in intravenous fluids:
• it must be stored at 2-8°C for not more than 24 hours
• it does not need to be protected from light during infusion.
• 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.
6 Contents of the pack and other information
What Zofran injection contains
• The active ingredient is ondansetron. Each 2 ml Zofran injection ampoule contains ondansetron 4 mg. Each 4 ml
Zofran injection ampoule contains ondansetron 8 mg.
• The other ingredients are citric acid (E330), sodium citrate (E331), sodium chloride and Water for Injections.
What Zofran injection looks like and contents of the pack
Zofran injection is a clear, colourless liquid.
Zofran injection is available in:
• 2 ml (4 mg) Flexi-amps that are plastic ampoules
• 4 ml (8 mg) Flexi-amps that are plastic ampoules
Packed in boxes of 5 ampoules.
Not all packs are marketed.
Marketing Authorisation Holder and Manufacturer
Novartis Pharmaceuticals UK Ltd, Frimley Business Park, Frimley, Camberley, Surrey, GU16 7SR, United Kingdom
Leaflet date: May 2016
Source: Medicines and Healthcare Products Regulatory Agency
Disclaimer: Every effort has been made to ensure that the information provided here is accurate, up-to-date and complete, but no guarantee is made to that effect. Drug information contained herein may be time sensitive. This information has been compiled for use by healthcare practitioners and consumers in the United States. The absence of a warning for a given drug or combination thereof in no way should be construed to indicate that the drug or combination is safe, effective or appropriate for any given patient. If you have questions about the substances you are taking, check with your doctor, nurse or pharmacist.