This information is intended for use by health professionals

1. Name of the medicinal product

Fluorouracil Injection, 50 mg/ml, solution for injection

2. Qualitative and quantitative composition

One vial of Fluorouracil Injection contains:

500 mg fluorouracil in 10 ml solution (50 mg/ml)

1000 mg fluorouracil in 20 ml solution (50 mg/ml)

2500 mg fluorouracil in 50 ml solution (50 mg/ml)

5000 mg fluorouracil in 100 ml solution (50 mg/ml)

For a full list of excipients, see section 6.1.

3. Pharmaceutical form

Solution for injection

Fluorouracil Injection, 50 mg/ml, solution for injection is a clear, colourless or almost colourless solution.

4. Clinical particulars
4.1 Therapeutic indications

Fluorouracil Injection, 50 mg/ml, solution for injection, may be used alone or in combination, for its palliative action in the management of common malignancies particularly cancer of the colon and breast, either as single agent or in combination with other cytotoxic agents.

4.2 Posology and method of administration

Routes of administration:

Fluorouracil Injection can be given by intravenous injection or intravenous or intra-arterial infusion.


Selection of an appropriate dose and treatment regime depends upon the condition of the patient, the type of carcinoma being treated and whether fluorouracil is to be administered alone or in combination with other therapy. Initial treatment should be given in hospital and the total daily dose should not exceed 1 gram. It is customary to calculate the dose in accordance with the patient's actual bodyweight unless there is obesity, oedema or some other form of abnormal fluid retention such as ascites. In this case, ideal weight is used as the basis for calculation.

Reduction of the dose is advisable in patients with any of the following:

1. Cachexia.

2. Major surgery within preceding 30 days.

3. Reduced bone marrow function.

4. Impaired hepatic or renal function.


The following regimens have been recommended for use as a single agent:

Initial Treatment:

This may be in the form of an infusion or an injection, the former usually being preferred because of lesser toxicity.

Intravenous Infusion:

15 mg/kg bodyweight but not more than 1 g per infusion, diluted in 500 ml of 5 % glucose or 0.9 % NaCl injection and given by intravenous infusion at a rate of 40 drops per minute over 4 hours. Alternatively the daily dose may be infused over 30 – 60 minutes or may be given as a continuous infusion over 24 hours. The infusion may be repeated daily until there is evidence of toxicity or a total dose of 12 – 15 g has been reached.

Intravenous Injection:

12 mg/kg bodyweight may be given daily for 3 days and then, if there is no evidence of toxicity, 6 mg/kg on alternate days for 3 further doses. An alternative regime is 15 mg/kg as a single intravenous injection once a week throughout the course.

Intra-arterial Infusion:

5 – 7.5 mg/kg bodyweight daily may be given by 24 hour continuous intra-arterial infusion.

Maintenance Therapy:

An initial intensive course may be followed by maintenance therapy providing there are no significant toxic effects. In all instances, toxic side effects must disappear before maintenance therapy is started.

The initial course of fluorouracil can be repeated after an interval of 4 to 6 weeks from the last dose or, alternatively, treatment can be continued with intravenous injections of 5 – 15 mg/kg bodyweight at weekly intervals.

This sequence constitutes a course of therapy. Some patients have received up to 30 g at a maximum rate of 1 g daily. A more recent alternative method is to give 15 mg/kg IV once a week throughout the course of treatment. This obviates the need for an initial period of daily administration.

In combination with Irradiation: Irradiation combined with fluorouracil has been found to be useful in the treatment of certain types of metastatic lesions in the lungs and for the relief of pain caused by recurrent, inoperable growth. The standard dose of fluorouracil should be used.


No recommendations are made regarding the use of Fluorouracil in children.


Fluorouracil should be used in the elderly with similar considerations as with normal adult doses.

4.3 Contraindications

Fluorouracil is contraindicated in seriously debilitated patients or those with bone marrow depression after radiotherapy or treatment with other antineoplastic agents.

Fluorouracil is strictly contraindicated in pregnant or breast feeding women.

Fluorouracil should not be used in the management of non-malignant disease.

Fluorouracil is contraindicated in patients who have had a serious hypersensitivity reaction to previous doses of fluorouracil or any of its constituents.

Fluorouracil must not be taken or used concomitantly with brivudin, sorivudine and analogues. Brivudin, sorivudine and analogues are potent inhibitors of the enzyme dihydropyrimidine dehydrogenase (DPD) which degrades fluorouracil (see also sections 4.4 and 4.5).

Fluorouracil is contraindicated in patients with known complete absence of dihydropyrimidine dehydrogenase (DPD) activity (see section 4.4)

4.4 Special warnings and precautions for use

It is recommended that fluorouracil should only be given by, or under the strict supervision of, a qualified physician who is conversant with the use of potent antimetabolites.

All patients should be admitted to hospital for initial treatment.

Adequate treatment with fluorouracil is usually followed by leukopenia, the lowest white blood cell (W.B.C.) count commonly being observed between the 7th and 14th day of the first course, but occasionally being delayed for as long as 20 days.

The count usually returns to normal by the 30th day. Daily monitoring of platelet and W.B.C. count is recommended and treatment should be stopped if platelets fall below 100,000 per mm3 or the W.B.C. count falls below 3,500 per mm3. If the total count is less than 2,000 per mm3, and especially if there is granulocytopenia, it is recommended that the patient be placed in protective isolation in the hospital and treated with appropriate measures to prevent systemic infection.

Treatment should also be stopped at the first sign of oral ulceration or if there is evidence of gastrointestinal side effects such as stomatitis, diarrhoea, bleeding from the G.I. tract or haemorrhage at any site. The ratio between effective and toxic dose is small and therapeutic response is unlikely without some degree of toxicity. Care must be taken therefore, in the selection of patients and adjustment of dosage.

Fluorouracil should be used with caution in patients with reduced renal or liver function or jaundice.


Cardiotoxicity has been associated with fluoropyrimidine therapy, including myocardial infarction, angina, arrhythmias, myocarditis, cardiogenic shock, sudden death and electrocardiographic changes (including very rare cases of QT prolongation). These adverse events are more common in patients receiving continuous infusion of 5-fluorouracil rather than bolus injection. Prior history of coronary artery disease may be a risk factor for cardiac adverse reactions. Care should therefore be exercised in treating patients who experienced chest pain during courses of treatment, or patients with a history of heart disease. Cardiac function should be regularly monitored during treatment with fluorouracil. In case of severe cardiotoxicity the treatment should be discontinued.


Cases of encephalopathies (including hyperammonaemic encephalopathy, leukoencephalopathy) associated with 5-fluorouracil treatment have been reported from post-marketing sources. Signs or symptoms of encephalopathy are altered mental status, confusion, disorientation, coma or ataxia. If a patient develops any of these symptoms withhold treatment and test serum ammonia levels immediately. In case of elevated serum ammonia levels initiate ammonia-lowering therapy.

Caution is necessary when administering fluorouracil to patients with renal and/or hepatic impairment. Patients with impaired renal and/or hepatic function may have an increased risk for hyperammonaemia and hyperammonaemic encephalopathy.

Dihydropyrimidine dehydrogenase (DPD) deficiency

Rarely, unexpected, severe toxicity (e.g. stomatitis, diarrhoea, mucosal inflammation, neutropenia and neurotoxicity) associated with 5-fluorouracil has been attributed to a deficiency of DPD activity.

Patients with low or absent DPD activity, an enzyme involved in fluorouracil degradation, are at increased risk for severe, life-threatening, or fatal adverse reactions caused by fluorouracil. Although DPD deficiency cannot be precisely defined, it is known that patients with certain homozygous or certain compound heterozygous mutations in the DPYD gene locus (e.g. DPYD*2A, c.1679T>G, c.2846A>T and c.1236G>A/HapB3 variants), which can cause complete or near complete absence of DPD enzymatic activity (as determined from laboratory assays), have the highest risk of life-threatening or fatal toxicity and should not be treated with 5-fluorouracil (see section 4.3). No dose has been proven safe for patients with complete absence of DPD activity.

Patients with certain heterozygous DPYD variants (including DPYD*2A, c.1679T>G, c.2846A>T and c.1236G>A/HapB3 variants) have been shown to have increased risk of severe toxicity when treated with fluoropyrimidines.

The frequency of the heterozygous DPYD*2A genotype in the DPYD gene in Caucasian patients is around 1%, 1.1% for c.2846A>T, 2.6-6.3% for c.1236G>A/HapB3 variants and 0.07 to 0.1% for c.1679T>G. Genotyping for these alleles is recommended to identify patients at increased risk for severe toxicity. Data on the frequency of these DPYD variants in other populations than Caucasian is limited. It cannot be excluded that other rare variants may also be associated with an increased risk of severe toxicity.

Patients with partial DPD deficiency (such as those with heterozygous mutations in the DPYD gene) and where the benefits of 5-fluorouracil are considered to outweigh the risks (taking into account the suitability of an alternative non-fluoropyrimidine chemotherapeutic regimen), must be treated with extreme caution and frequent monitoring with dose adjustment according to toxicity should be conducted. A reduction of the starting dose in these patients may be considered to avoid serious toxicity. There is insufficient data to recommend a specific dose in patients with partial DPD activity as measured by specific test. It has been reported that the DPYD*2A, c.1679T>G variants lead to a greater reduction in enzymatic activity compared to other variants with a higher risk of side effects. The consequences of a reduced dose on the efficacy are currently uncertain. Therefore, in the absence of serious toxicity the dose could be increased while carefully monitoring the patient.

The patients who are tested negative for the above-mentioned alleles may still have a risk of severe adverse events.

In patients with unrecognised DPD deficiency treated with 5-fluoruracil as well as in those patients who test negative for specific DPYD variations, life-threatening toxicities manifesting as acute overdose may occur (see section 4.9). In the event of grade 2-4 acute toxicity, treatment must be discontinued immediately. Permanent discontinuation should be considered based on clinical assessment of the onset, duration and severity of the observed toxicities.

Patients taking phenytoin concomitantly with fluorouracil should undergo regular testing because of the possibility of an elevated plasma level of phenytoin.

4.5 Interaction with other medicinal products and other forms of interaction

Various agents have been reported to biochemically modulate the antitumour efficacy or toxicity of fluorouracil, common drugs include methotrexate, metronidazole, leucovorin as well as allopurinol and cimetidine which can affect the availability of the active drug.

Marked elevations of prothrombin time and INR have been reported in a few patients stabilised on warfarin therapy following initiation of fluorouracil regimes.

The enzyme dihydropyrimidine dehydrogenase (DPD) plays an important role in the degradation of fluorouracil. The nucleoside analogues such as brivudin and sorivudine can cause a sharp rise in the plasma concentration of 5-fluorouracil or other fluoropyrimidines, with accompanying toxic reactions.

For this reason, a period of at least 4 weeks should elapse between taking or using fluorouracil and taking or using brivudin, sorivudine and analogues. Where applicable, determination of DPD enzyme activity is indicated before starting treatment with 5-fluorpyrimidines. In the event of accidental administration of brivudin to patients being treated with fluorouracil, effective measures should be taken to reduce the toxicity of fluorouracil. Immediate admission to hospital is recommended. All measures should be initiated to prevent systemic infections and dehydration.

Where phenytoin and fluorouracil have been administered concomitantly, there have been reports of elevated plasma levels of phenytoin, resulting in symptoms of phenytoin intoxication (see 4.4).

Fluorouracil should be avoided in combination with clozapine due to the increased risk of agranulocytosis.

4.6 Pregnancy and lactation

Fluorouracil is strictly contraindicated in pregnant and breast feeding women.

4.7 Effects on ability to drive and use machines

Fluorouracil may induce side effects such as nausea and vomiting which could interfere with driving or the use of heavy machinery.

4.8 Undesirable effects

The most commonly reported undesirable effects are diarrhoea, nausea. Leukopenia is also very common and the precautions described above should be followed.

Frequency assessment:

Very common (≥ 1/10)

Common (≥ 1/100, < 1/10)

Uncommon (≥ 1/1,000, < 1/100)

Rare (≥ 1/10,000, < 1/1,000)

Very rare (< 1/10,000), not known

Infections and infestations

Very common




Blood and lymphatic system disorders

Very common

Leukopenia, myelosuppression, neutropenia, granulocytopenia, thrombocytopenia, anemia, pancytopenia


Febrile neutropenia



Immune system disorders

Very common


Very rare

Anaphylactic reaction, anaphylactic shock

Endocrine disorders


Increase of T4 (total thyroxin), increase of T3 (total trijodthyronin)

Metabolism and nutrition disorders



Psychiatric disorders



Nervous system disorders


Extrapyramidalmotoric disturbances, cerebellar disturbances, cortical disturbances, nystagmus, headache, vertigo, parkinson-like symptoms, pyramid signs, euphoria, opticus neuritis, peripheral neuropathy, leuko-encephalopathy including ataxia, acute cerebellar syndrome, dysarthria, confusion, disorientation, myasthenia, aphasia, convulsion or coma


Hyperammonaemic encephalopathy

Eye disorders




Excessive lacrimation, dacryostenosis, visual changes, photophobia, diplopia, decreased visus, blepharitis, ectropion

Cardiac disorders


Chest pain, tachycardia, ECG-changes, angina pectoris


Arrhythmia, myocardial infarction, myocarditis, heart failure, dilatative cardiomyopathy, cardiac shock,

Very rare

Cardiac arrest, sudden cardiac death



Vascular disorders


Vasculitis, Raynaud's phenomenon, cerebral ischaemia, intestinal ischaemia, peripheral ischaemia, thromboembolism

Respiratory, thoracic and mediastinal disorders


Epistaxis, dyspnea, bronchospasmus

Gastrointestinal disorders

Very common

Diarrhoea, nausea, vomiting, mucositis, stomatitis


Gastrointestinal ulceration, gastrointestinal hemorrhage

Hepatobiliary disorders


Liver cell damage


Liver necrosis

Skin and subcutaneous tissue disorders

Very common

Alopecia, palmar-plantar erythrodysesthesia


Dermatitis, hyperpigmentation, hypopigmentation, nail discoloration, nail hyperpigmentation, nail dystrophy, nailbed pain, nailbed inflammation, onycholysis, exanthema, dry skin, urticaria, photosensitivity, recall phenomenon

General disorders and administration site conditions

Very common

Fever, fatigue


Thrombophlebitis, vein tracking, dehydration

Reporting of suspected adverse reactions

Reporting suspected adverse reactions after authorisation of the medicinal product is important. It allows continued monitoring of the benefit/risk balance of the medicinal product. Healthcare professionals are asked to report any suspected adverse reactions via or search for MHRA Yellow Card in the Google Play Apple App Sore.

4.9 Overdose

Manifestations of overdosage of fluorouracil can be nausea, vomiting, diarrhoea, gastrointestinal ulceration and bleeding, bone marrow depression (including thrombocytopenia, leukopenia and agranulocytosis). Patients who have been exposed to an overdose of fluorouracil should be monitored haematologically for at least four weeks. Should abnormalities appear, appropriate therapy should be utilised.

5. Pharmacological properties
5.1 Pharmacodynamic properties

Fluorouracil is an analogue of uracil, a component of ribonucleic acid. The drug is believed to function as an antimetabolite. After intracellular conversion to the active deoxynucleotide, it interferes with the synthesis of DNA by blocking the conversion of deoxyuridylic acid to thymidylic acid by the cellular enzyme thymidylate synthetase. Fluorouracil may also interfere with RNA synthesis.

Pharmacotherapeutic group:

ATC code:


L01B C02

5.2 Pharmacokinetic properties

After intravenous administration, fluorouracil is distributed through the body water and disappears from the blood within 3 hours. It is preferentially taken up by actively dividing tissues and tumours after conversion to its nucleotide. Fluorouracil readily enters the C.S.F. and brain tissue.

5-fluorouracil is catabolised by the enzyme DPD to the much less toxic dihydro-5-fluorouracil (FUH2). Dihydropyrimidinase cleaves the pyrimidine ring to yield 5-fluoro-ureidopropionic acid (FUPA). Finally, β-ureido-propionase cleaves FUPA to α-fluoro-β-alanine (FBAL) which is cleared in the urine. DPD activity is the rate limiting step. Deficiency of DPD may lead to increased toxicity of 5-fluorouracil (see section 4.3 and 4.4).

Following IV administration, the plasma elimination half-life averages about 16 minutes and is dose dependant. Following a single IV dose of fluorouracil approximately 15 % of the dose is excreted unchanged in the urine within 6 hours; over 90 % of this is excreted in the first hour. The remainder is mostly metabolised in the liver by the usual body mechanisms for uracil.

5.3 Preclinical safety data

Not applicable

6. Pharmaceutical particulars
6.1 List of excipients

Sodium hydroxide, water for injections

6.2 Incompatibilities

Fluorouracil is incompatible with calcium folinate, carboplatin, cisplatin, cytarabine, diazepam, doxorubicin, droperidol, filgrastim, gallium nitrate, methotrexate, metoclopramide, morphine, ondansetron, parenteral nutrition, vinorelbin, other anthracylines.

Formulated solutions are alkaline and it is recommended that admixture with acidic drug preparations should be avoided.

6.3 Shelf life

2 years

Fluorouracil Injection, 50 mg/ml, solution for injection, is intended for single use only.

The chemical and physical in-use stability of the solution diluted with glucose or sodium chloride injection has been demonstrated for 24 hours at a temperature not exceeding 25 °C.

From a microbiological point of view, the product should be used immediately. If not used immediately, in-use storage times and conditions prior to use are the responsibility of the user and would normally not be longer than 24 hours at 2 – 8 °C, unless dilution has taken place in controlled and validated aseptic conditions.

6.4 Special precautions for storage

Do not store Fluorouracil Injection, 50 mg/ml, solution for injection above 25 °C.

Do not refrigerate or freeze.

Keep the container in the outer carton.

If a precipitate has formed as a result of exposure to low temperatures, redissolve by heating to 40 °C accompanied by vigorous shaking. Allow to cool to body temperature prior to use.

6.5 Nature and contents of container

Type I conventional clear glass vials, rubber closures. The rubber stopper is protected by a flanged aluminium cap with a flip-off top.

500 mg/ 10 ml:

1000 mg/ 20 ml:

2500 mg/ 50 ml:

5000 mg/100 ml:

Pack Size: Singles, 10

Pack Size: Singles, 10

Pack Size: Singles, 10

Pack Size: Singles, 10

6.6 Special precautions for disposal and other handling

Fluorouracil Injection, 50 mg/ml, solution for injection should be administered only by or under the direct supervision of a qualified physician who is experienced in the use of cancer chemotherapeutic agents.

Fluorouracil Injection should only be prepared for administration by professionals who have been trained in the safe use of the preparation. Preparation should only be carried out in an aseptic cabinet or suite dedicated for the assembly of cytotoxics.

In the event of spillage, operators should put on gloves, face mask, eye-protection and disposable apron and mop up the spilled material with an absorbent material kept in the area for that purpose. The area should then be cleaned and all contaminated material transferred to a cytotoxic spillage bag or bin and sealed for incineration.


Fluorouracil is an irritant, contact with skin and mucous membranes should be avoided. In the event of contact with the skin or eyes, the affected area should be washed with copious amounts of water or normal saline. A bland cream may be used to treat the transient stinging of the skin. Medical advice should be sought if the eyes are affected or if the preparation is inhaled or ingested.

Preparation Guidelines

a) Chemotherapeutic agents should be prepared for administration only by professionals who have been trained in the safe use of the preparation.

b) Operations such as reconstitution of powder and transfer to syringes should be carried out only under aseptic conditions in a suite or cabinet dedicated for the assembly of cytotoxics.

c) The personnel carrying out these procedures should be adequately protected with clothing, gloves and eye shield.

d) Pregnant personnel are advised not to handle chemotherapeutic agents.


All materials that have been utilised for dilution and administration should be disposed of according to standard procedures (incineration).


Fluorouracil may be diluted with 5 % glucose or 0.9 % sodium chloride intravenous infusions immediately before parenteral use. The remainder of solutions should be discarded after use; do not make up into multi-dose preparations.

Administrative Data

7. Marketing authorisation holder


Gesellschaft für klinische Spezialpräparate mbH

Theaterstr. 6

22880 Wedel


8. Marketing authorisation number(s)

PL 11587/0015

9. Date of first authorisation/renewal of the authorisation

6 July 2000 / 11 October 2006

10. Date of revision of the text

October 2018