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Pfizer Healthcare Ireland

9 Riverwalk, National Digital Park, Citywest Business Campus, Dublin 24,
Telephone: +353 1 467 6500
Fax: +353 1 467 6501
Medical Information Direct Line: http://www.pfizermedicalinformation.ie
Medical Information Direct Line: 1 800 633 363

Summary of Product Characteristics last updated on medicines.ie: 14/09/2015
SPC Tazocin 2 g / 0.25 g powder for solution for infusion

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Tazocin 2 g / 0.25 g powder for solution for infusion

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Each vial contains piperacillin (as sodium salt) equivalent to 2 g and tazobactam (as sodium salt) equivalent to 0.25 g.

Each vial of Tazocin 2 g / 0.25 g contains 5.58 mmol (128 mg) of sodium.


For the full list of excipients, see section 6.1.

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Powder for solution for infusion.

White to off-white powder.

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4.1 Therapeutic indications

Tazocin is indicated for the treatment of the following infections in adults and children over 2 years of age (see sections 4.2 and 5.1):

Adults and adolescents

- Severe pneumonia including hospital-acquired and ventilator-associated pneumonia

- Complicated urinary tract infections (including pyelonephritis)

- Complicated intra-abdominal infections

- Complicated skin and soft tissue infections (including diabetic foot infections)

Treatment of patients with bacteraemia that occurs in association with, or is suspected to be associated with, any of the infections listed above.

Tazocin may be used in the management of neutropenic patients with fever suspected to be due to a bacterial infection.

Children 2 to 12 years of age

- Complicated intra-abdominal infections

Tazocin may be used in the management of neutropenic children with fever suspected to be due to a bacterial infection.

Consideration should be given to official guidance on the appropriate use of antibacterial agents.

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4.2 Posology and method of administration


The dose and frequency of Tazocin depends on the severity and localisation of the infection and expected pathogens.

Adult and adolescent patients


The usual dose is 4 g piperacillin / 0.5 g tazobactam given every 8 hours.

For nosocomial pneumonia and bacterial infections in neutropenic patients, the recommended dose is 4 g piperacillin / 0.5 g tazobactam administered every 6 hours. This regimen may also be applicable to treat patients with other indicated infections when particularly severe.

The following table summarises the treatment frequency and the recommended dose for adult and adolescent patients by indication or condition:

Treatment frequency

Tazocin 4 g / 0.5 g

Every 6 hours

Severe pneumonia

Neutropenic adults with fever suspected to be due to a bacterial infection.

Every 8 hours

Complicated urinary tract infections (including pyelonephritis)

Complicated intra-abdominal infections

Skin and soft tissue infections (including diabetic foot infections)

Patients with renal impairment

The intravenous dose should be adjusted to the degree of actual renal impairment as follows (each patient must be monitored closely for signs of substance toxicity; medicinal product dose and interval should be adjusted accordingly):

Creatinine clearance (ml/min)

Tazocin (recommended dose)

> 40

No dose adjustment necessary


Maximum dose suggested: 4 g / 0.5 g every 8 hours

< 20

Maximum dose suggested: 4 g / 0.5 g every 12 hours

For patients on haemodialysis, one additional dose of piperacillin / tazobactam 2 g / 0.25 g should be administered following each dialysis period, because haemodialysis removes 30%-50% of piperacillin in 4 hours.

Patients with hepatic impairment

No dose adjustment is necessary (see section 5.2).

Elderly patients

No dose adjustment is required for the elderly with normal renal function or creatinine clearance values above 40 ml/min.

Paediatric population (2-12 years of age)


The following table summarises the treatment frequency and the dose per body weight for paediatric patients 2-12 years of age by indication or condition:

Dose per weight and treatment frequency

Indication / condition

80 mg Piperacillin / 10 mg Tazobactam per kg body weight / every 6 hours

Neutropenic children with fever suspected to be due to bacterial infections*

100 mg Piperacillin / 12.5 mg Tazobactam per kg body weight / every 8 hours

Complicated intra-abdominal infections*

* Not to exceed the maximum 4 g / 0.5 g per dose over 30 minutes.

Patients with renal impairment

The intravenous dose should be adjusted to the degree of actual renal impairment as follows (each patient must be monitored closely for signs of substance toxicity; medicinal product dose and interval should be adjusted accordingly):

Creatinine clearance (ml/min)

Tazocin (recommended dose)

> 50

No dose adjustment needed.

≤ 50

70 mg piperacillin / 8.75 mg tazobactam / kg every 8 hours.

For children on haemodialysis, one additional dose of 40 mg piperacillin / 5 mg tazobactam / kg should be administered following each dialysis period.

Use in children aged below 2 years

The safety and efficacy of Tazocin in children 0- 2 years of age has not been established.

No data from controlled clinical studies are available.

Treatment duration

The usual duration of treatment for most indications is in the range of 5-14 days. However, the duration of treatment should be guided by the severity of the infection, the pathogen(s) and the patient's clinical and bacteriological progress.

Method of administration

Tazocin 2 g / 0.25 g is administered by intravenous infusion (over 30 minutes).

For instructions on reconstitution of the medicinal product before administration, see section 6.6.

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4.3 Contraindications

Hypersensitivity to the active substances, any other penicillin-antibacterial agent or to any of the excipients listed in section 6.1.

History of acute severe allergic reaction to any other beta-lactam active substances (e.g. cephalosporin, monobactam or carbapenem).

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4.4 Special warnings and precautions for use

The selection of piperacillin / tazobactam to treat an individual patient should take into account the appropriateness of using a broad-spectrum semi-synthetic penicillin based on factors such as the severity of the infection and the prevalence of resistance to other suitable antibacterial agents.

Before initiating therapy with Tazocin, careful inquiry should be made concerning previous hypersensitivity reactions to penicillins, other beta-lactam agents (e.g. cephalosporin, monobactam or carbapenem) and other allergens. Serious and occasionally fatal hypersensitivity (anaphylactic/anaphylactoid [including shock]) reactions have been reported in patients receiving therapy with penicillins, including piperacillin / tazobactam. These reactions are more likely to occur in persons with a history of sensitivity to multiple allergens. Serious hypersensitivity reactions require the discontinuation of the antibiotic, and may require administration of epinephrine and other emergency measures.

Serious skin reactions, such as Stevens-Johnson syndrome and toxic epidermal necrolysis, have been reported in patients receiving Tazocin (see section 4.8). If patients develop a skin rash they should be monitored closely and Tazocin discontinued if lesions progress.

Antibiotic-induced pseudomembranous colitis may be manifested by severe, persistent diarrhoea which may be life-threatening. The onset of pseudomembranous colitis symptoms may occur during or after antibacterial treatment. In these cases Tazocin, should be discontinued.

Therapy with Tazocin may result in the emergence of resistant organisms, which might cause super-infections.

Bleeding manifestations have occurred in some patients receiving beta-lactam antibiotics. These reactions sometimes have been associated with abnormalities of coagulation tests, such as clotting time, platelet aggregation and prothrombin time, and are more likely to occur in patients with renal failure. If bleeding manifestations occur, the antibiotic should be discontinued and appropriate therapy instituted.

Leukopenia and neutropenia may occur, especially during prolonged therapy; therefore, periodic assessment of haematopoietic function should be performed.

As with treatment with other penicillins, neurological complications in the form of convulsions may occur when high doses are administered, especially in patients with impaired renal function.

Each vial of Tazocin 2 g / 0.25 g contains 5.58 mmol (128 mg) of sodium and Tazocin 4 g / 0.5 g contains 11.16 mmol (256 mg) of sodium. This should be taken into consideration for patients who are on a controlled sodium diet.

Hypokalaemia may occur in patients with low potassium reserves or those receiving concomitant medicinal products that may lower potassium levels; periodic electrolyte determinations may be advisable in such patients.

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4.5 Interaction with other medicinal products and other forms of interaction

Non-depolarising muscle relaxants

Piperacillin when used concomitantly with vecuronium has been implicated in the prolongation of the neuromuscular blockade of vecuronium. Due to their similar mechanisms of action, it is expected that the neuromuscular blockade produced by any of the non-depolarising muscle relaxants could be prolonged in the presence of piperacillin.

Oral anticoagulants

During simultaneous administration of heparin, oral anticoagulants and other substances that may affect the blood coagulation system including thrombocyte function, appropriate coagulation tests should be performed more frequently and monitored regularly.


Piperacillin may reduce the excretion of methotrexate; therefore, serum levels of methotrexate should be monitored in patients to avoid substance toxicity.


As with other penicillins, concurrent administration of probenecid and piperacillin / tazobactam produces a longer half-life and lower renal clearance for both piperacillin and tazobactam; however, peak plasma concentrations of either substances are unaffected.


Piperacillin, either alone or with tazobactam, did not significantly alter the pharmacokinetics of tobramycin in subjects with normal renal function and with mild or moderate renal impairment. The pharmacokinetics of piperacillin, tazobactam, and the M1 metabolite were also not significantly altered by tobramycin administration.

The inactivation of tobramycin and gentamicin by piperacillin has been demonstrated in patients with severe renal impairment.

For information related to the administration of piperacillin / tazobactam with aminoglycosides please refer to sections 6.2 and 6.6.


No pharmacokinetic interactions have been noted between piperacillin / tazobactam and vancomycin.

Effects on laboratory tests

Non-enzymatic methods of measuring urinary glucose may lead to false-positive results, as with other penicillins. Therefore, enzymatic urinary glucose measurement is required under Tazocin therapy.

A number of chemical urine protein measurement methods may lead to false-positive results. Protein measurement with dip sticks is not affected.

The direct Coombs test may be positive.

Bio-Rad Laboratories Platelia Aspergillus EIA tests may lead to false-positive results for patients receiving Tazocin. Cross-reactions with non-Aspergillus polysaccharides and polyfuranoses with Bio-Rad Laboratories Platelia Aspergillus EIA test have been reported.

Positive test results for the assays listed above in patients receiving Tazocin should be confirmed by other diagnostic methods.

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4.6 Fertility, pregnancy and lactation


There are no or a limited amount of data from the use of Tazocin in pregnant women.

Studies in animals have shown developmental toxicity, but no evidence of teratogenicity, at doses that are maternally toxic (see section 5.3).

Piperacillin and tazobactam cross the placenta. Piperacillin / tazobactam should only be used during pregnancy if clearly indicated, i.e. only if the expected benefit outweighs the possible risks to the pregnant woman and foetus.


Piperacillin is excreted in low concentrations in human milk; tazobactam concentrations in human milk have not been studied. Women who are breast-feeding should be treated only if the expected benefit outweighs the possible risks to the woman and child.


A fertility study in rats showed no effect on fertility and mating after intraperitoneal administration of tazobactam or the combination piperacillin / tazobactam (see section 5.3).

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4.7 Effects on ability to drive and use machines

No studies on the effect on the ability to drive and use machines have been performed.

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4.8 Undesirable effects

The most commonly reported adverse reaction is diarrhoea (occurring in 1 patient out of 10).

Among the most serious adverse reactions pseudo-membranous colitis and toxic epidermal necrolysis occur in 1 to 10 patients in 10,000. The frequencies for pancytopenia, anaphylactic shock and Stevens-Johnson syndrome cannot be estimated from the currently available data.

In the following table, adverse reactions are listed by system organ class and MedDRA-preferred term. Within each frequency grouping, undesirable effects are presented in order of decreasing seriousness.

System Organ Class

Very common



≥ 1/100 to < 1/10


≥ 1/1,000 to < 1/100


≥ 1/10,000 to < 1/1,000

Frequency not known (cannot be estimated from available data)

Infections and infestations




Blood and lymphatic system disorders


thrombocytopenia, anaemia, Coombs direct test positive, activated partial thromboplastin time prolonged

leukopenia, prothrombin time prolonged

agranulocytosis, epistaxis

pancytopenia, neutropenia, purpura, bleeding time prolonged, haemolytic anaemia, eosinophilia, thrombocytosis

Immune system disorders


anaphylactoid reaction, anaphylactic reaction, anaphylactoid shock, anaphylactic shock, hypersensitivity

Metabolism and nutrition disorders


blood albumin decreased, protein total decreased

hypokalaemia, blood glucose decreased


Nervous system disorders


headache, insomnia


Vascular disorders


hypotension, thrombophlebitis, phlebitis, flushing


Gastrointestinal disorders


abdominal pain, vomiting, nausea, constipation, dyspepsia


pseudo-membranous colitis, stomatitis


Hepatobiliary disorders


alanine aminotransferase increased, aspartate aminotransferase increased, blood alkaline phosphatase increased

blood bilirubin increased


hepatitis, jaundice, gamma-glutamyltransferase increased

Skin and subcutaneous tissue disorders


rash, pruritus

erythema multiforme, urticaria, rash maculopapular

toxic epidermal necrolysis

Stevens-Johnson syndrome, dermatitis bullous

Musculoskeletal and connective tissue disorders


arthralgia, myalgia


Renal and urinary disorders


blood creatinine increased, blood urea increased


renal failure, tubulointerstitial nephritis

General disorders and administration site conditions


pyrexia, injection site reaction



Piperacillin therapy has been associated with an increased incidence of fever and rash in cystic fibrosis patients.

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:

HPRA Pharmacovigilance

Earlsfort Terrace

IRL - Dublin 2

Tel: +353 1 6764971

Fax: +353 1 6762517

Website: www.hpra.ie

e-mail: medsafety@hpra.ie

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4.9 Overdose


There have been post-marketing reports of overdose with piperacillin / tazobactam. The majority of those events experienced, including nausea, vomiting, and diarrhoea, have also been reported with the usual recommended dose. Patients may experience neuromuscular excitability or convulsions if higher than recommended doses are given intravenously (particularly in the presence of renal failure).


In the event of an overdose, piperacillin / tazobactam treatment should be discontinued. No specific antidote is known.

Treatment should be supportive and symptomatic according to the patient's clinical presentation.

Excessive serum concentrations of either piperacillin or tazobactam may be reduced by haemodialysis (see section 4.4).

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5.1 Pharmacodynamic properties

Pharmacotherapeutic group: Antibacterials for systemic use, Combinations of penicillins incl. beta-lactamase inhibitors; ATC code: J01C R05

Mechanism of action

Piperacillin, a broad-spectrum, semisynthetic penicillin exerts bactericidal activity by inhibition of both septum and cell-wall synthesis.

Tazobactam, a beta-lactam structurally related to penicillins, is an inhibitor of many beta-lactamases, which commonly cause resistance to penicillins and cephalosporinsbut it does not inhibit AmpC enzymes or metallo beta-lactamases. Tazobactum extends the antibiotic spectrum of piperacillin to include many beta-lactamase-producing bacteria that have acquired resistance to piperacillin alone.

Phamacokinetic / Pharmacodynamic relationship

The time above the minimum inhibitory concentration (T>MIC) is considered to be the major pharmacodynamic determinant of efficacy for piperacillin.

Mechanism of resistance

The two main mechanisms of resistance to piperacillin / tazobactam are:

• Inactivation of the piperacillin component by those beta-lactamases that are not inhibited by tazobactam: beta-lactamases in the Molecular class B, C and D. In addition, tazobactam does not provide protection against extended-spectrum beta-lactamases (ESBLs) in the Molecular class A and D enzyme groups.

• Alteration of penicillin-binding proteins (PBPs), which results in the reduction of the affinity of piperacillin for the molecular target in bacteria.

Additionally, alterations in bacterial membrane permeability, as well as expression of multi-drug efflux pumps, may cause or contribute to bacterial resistance to piperacillin / tazobactam, especially in Gram-negative bacteria.


EUCAST Clinical MIC Breakpoints for Piperacillin / Tazobactam (2009-12-02, v 1). For Susceptibility Testing Purposes, the Concentration of Tazobactam is Fixed at 4 mg/l


Species-related breakpoints (S≤/R>)





Gram-negative and Gram-positive anaerobes


Non-species related breakpoints


The susceptibility of streptococci is inferred from the penicillin susceptibility.

The susceptibility of staphylococci is inferred from the oxacillin susceptibility.


The prevalence of acquired resistance may vary geographically and with time for selected species, and local information on resistance is desirable, particularly when treating severe infections. As necessary, expert advice should be sought when the local prevalence of resistance is such that the utility of the agent in at least some types of infections is questionable.

Groupings of relevant species according to piperacillin / tazobactam susceptibility


Aerobic Gram-positive micro-organisms

Enterococcus faecalis

Listeria monocytogenes

Staphylococcus aureus, methicillin-susceptible£

Staphylococcus species, coagulase negative, methicillin-susceptible

Streptococcus pyogenes

Group B streptococci

Aerobic Gram-negative micro-organisms

Citrobacter koseri

Haemophilus influenza

Moraxella catarrhalis

Proteus mirabilis

Anaerobic Gram-positive micro-organisms

Clostridium species

Eubacterium species

Peptostreptococcus species

Anaerobic Gram-negative micro-organisms

Bacteroides fragilis group

Fusobacterium species

Porphyromonas species

Prevotella species


Aerobic Gram-positive micro-organisms

Enterococcus faecium$,+

Streptococcus pneumonia

Streptococcus viridans group

Aerobic Gram-negative micro-organisms

Acinetobacter baumannii$

Burkholderia cepacia

Citrobacter freundii

Enterobacter species

Escherichia coli

Klebsiella pneumonia

Morganella morganii

Proteus vulgaris

Providencia ssp.

Pseudomonas aeruginosa

Serratia species


Aerobic Gram-positive micro-organisms

Corynebacterium jeikeium

Aerobic Gram-negative micro-organisms

Legionella species

Stenotrophomonas maltophilia+,$

Other microorganisms

Chlamydophilia pneumonia

Mycoplasma pneumonia

$ Species showing natural intermediate susceptibility.

+ Species for which high-resistance rates (more than 50%) have been observed in one or more areas/countries/regions within the EU.

£ All methicillin-resistant staphylococci are resistant to piperacillin / tazobactam.

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5.2 Pharmacokinetic properties


The peak piperacillin and tazobactam concentrations after 4 g / 0.5 g administered over 30 minutes by intravenous infusion are 298 µg/ml and 34 µg/ml respectively.


Both piperacillin and tazobactam are approximately 30% bound to plasma proteins. The protein binding of either piperacillin or tazobactam is unaffected by the presence of the other compound. Protein binding of the tazobactam metabolite is negligible.

Piperacillin / tazobactam is widely distributed in tissues and body fluids including intestinal mucosa, gallbladder, lung, bile, and bone. Mean tissue concentrations are generally 50 to 100% of those in plasma. Distribution into cerebrospinal fluid is low in subjects with non-inflamed meninges, as with other penicillins.


Piperacillin is metabolised to a minor microbiologically active desethyl metabolite. Tazobactam is metabolised to a single metabolite that has been found to be microbiologically inactive.


Piperacillin and tazobactam are eliminated via the kidney by glomerular filtration and tubular secretion.

Piperacillin is excreted rapidly as unchanged substance, with 68% of the administered dose appearing in the urine. Tazobactam and its metabolite are eliminated primarily by renal excretion, with 80% of the administered dose appearing as unchanged substance and the remainder as the single metabolite. Piperacillin, tazobactam, and desethyl piperacillin are also secreted into the bile.

Following single or multiple doses of piperacillin / tazobactam to healthy subjects, the plasma half-life of piperacillin and tazobactam ranged from 0.7 to 1.2 hours and was unaffected by dose or duration of infusion. The elimination half-lives of both piperacillin and tazobactam are increased with decreasing renal clearance.

There are no significant changes in piperacillin pharmacokinetics due to tazobactam. Piperacillin appears to slightly reduce the clearance of tazobactam.

Special populations

The half-life of piperacillin and of tazobactam increases by approximately 25% and 18%, respectively, in patients with hepatic cirrhosis compared to healthy subjects.

The half-life of piperacillin and tazobactam increases with decreasing creatinine clearance. The increase in half-life is two-fold and four-fold for piperacillin and tazobactam, respectively, at creatinine clearance below 20 ml/min compared to patients with normal renal function.

Haemodialysis removes 30% to 50% of piperacillin / tazobactam, with an additional 5% of the tazobactam dose removed as the tazobactam metabolite. Peritoneal dialysis removes approximately 6% and 21% of the piperacillin and tazobactam doses, respectively, with up to 18% of the tazobactam dose removed as the tazobactam metabolite.

Paediatric population

In a population PK analysis, estimated clearance for 9 month-old to 12 year-old patients was comparable to adults, with a population mean (SE) value of 5.64 (0.34) ml/min/kg. The piperacillin clearance estimate is 80% of this value for paediatric patients 2-9 months of age. The population mean (SE) for piperacillin volume of distribution is 0.243 (0.011) l/kg and is independent of age.

Elderly patients

The mean half-life for piperacillin and tazobactam were 32% and 55% longer, respectively, in the elderly compared with younger subjects. This difference may be due to age-related changes in creatinine clearance.


No difference in piperacillin or tazobactam pharmacokinetics was observed between Asian (n=9) and Caucasian (n=9) healthy volunteers who received single 4 g / 0.5 g doses.

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5.3 Preclinical safety data

Non-clinical data reveal no special hazard for humans based on conventional studies of repeated dose toxicity and genotoxicity. Carcinogenicity studies have not been conducted with piperacillin / tazobactam.

A fertility and general reproduction study in rats using intraperitoneal administration of tazobactam or the combination piperacillin / tazobactam reported a decrease in litter size and an increase in fetuses with ossification delays and variations of ribs, concurrent with maternal toxicity. Fertility of the F1 generation and embryonic development of F2 generation were not impaired.

Teratogenicity studies using intravenous administration of tazobactam or the combination piperacillin / tazobactam in mice and rats resulted in slight reductions in rat fetal weights at maternally toxic doses but did not show teratogenic effects.

Peri/postnatal development was impaired (reduced pup weights, increase in stillbirths, increase in pup mortality) concurrent with maternal toxicity after intraperitoneal administration of tazobactam or the combination piperacillin / tazobactam in the rat.

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6.1 List of excipient(s)

Edetate disodium (EDTA)

Citric acid monohydrate

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6.2 Incompatibilities

This medicinal product must not be mixed with other medicinal products except those mentioned in section 6.6.

Whenever Tazocin is used concurrently with another antibiotic (e.g. aminoglycosides), the substances must be administered separately. The mixing of beta-lactam antibiotics with an aminoglycoside in vitro can result in substantial inactivation of the aminoglycoside.

Tazocin should not be mixed with other substances in a syringe or infusion bottle since compatibility has not been established.

Due to chemical instability, Tazocin should not be used in solutions containing only sodium bicarbonate.

Tazocin should not be added to blood products or albumin hydrolysates.

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6.3 Shelf life

Unopened vial: 3 years

Reconstituted solution in vial

Chemical and physical in-use stability has been demonstrated for up to 24 hours at 25°C and for 12 hours when stored in a refrigerator at 2-8°C, when reconstituted with one of the compatible solvents for reconstitution (see section 6.6).

Diluted infusion solution

After reconstitution, chemical and physical in-use stability of diluted infusion solutions has been demonstrated for 24 hours at 25°C and for 48 hours when stored in a refrigerator at 2-8°C, when reconstituted using one of the compatible solvents for further dilution of the reconstituted solution at the suggested dilution volumes (see section 6.6).

From a microbiological point of view, the reconstituted and diluted solutions 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 12 hours at 2-8°C, unless reconstitution and dilution have taken place in controlled and validated aseptic conditions.

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6.4 Special precautions for storage

Unopened vials: Do not store above 25°C.

For storage conditions of the reconstituted and diluted medicinal product, see section 6.3.

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6.5 Nature and contents of container

30 ml Type I glass vial with a bromo-butyl rubber stopper and flip-off seal.

Pack sizes: 1, 5, 10, 12, 25 or 50 vials per carton.

Not all pack sizes may be marketed.

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6.6 Special precautions for disposal and other handling

The reconstitution and dilution is to be made under aseptic conditions. The solution is to be inspected visually for particulate matter and discolouration prior to administration. The solution should only be used if the solution is clear and free from particles.

Intravenous use

Reconstitute each vial with the volume of solvent shown in the table below, using one of the compatible solvents for reconstitution. Swirl until dissolved. When swirled constantly, reconstitution generally occurs within 5 to 10 minutes (for details on handling, please see below).

Content of vial

Volume of solvent* to be added to vial

2 g / 0.25 g (2 g piperacillin and 0.25 g tazobactam)

10 ml

4 g / 0.5 g (4 g piperacillin and 0.5 g tazobactam)

20 ml

* Compatible solvents for reconstitution:

- 0.9% (9 mg/ml) sodium chloride solution for injection

- Sterile water for injections(1)

- Glucose 5%

(1) Maximum recommended volume of sterile water for injection per dose is 50 ml.

The reconstituted solutions should be withdrawn from the vial by syringe. When reconstituted as directed, the vial contents withdrawn by syringe will provide the labelled amount of piperacillin and tazobactam.

The reconstituted solutions may be further diluted to the desired volume (e.g. 50 ml to 150 ml) with one of the following compatible solvents:

- 0.9% (9 mg/ml) sodium chloride solution for injection

- Glucose 5%

- Dextran 6% in 0.9% (9 mg/ml) sodium chloride

- Lactated Ringers injection

- Hartmann's solution

- Ringer's acetate

- Ringer's acetate/malate

Co-administration with aminoglycosides

Due to the in vitro inactivation of the aminoglycoside by beta-lactam antibiotics, Tazocin and the aminoglycoside are recommended for separate administration. Tazocin and the aminoglycoside should be reconstituted and diluted separately when concomitant therapy with aminoglycosides is indicated.

In circumstances where co-administration is recommended, Tazocin is compatible for simultaneous co-administration via Y-site infusion only with the following aminoglycosides under the following conditions:


Tazocin Dose

Tazocin diluent volume (ml)

Aminoglycoside concentration range* (mg/ml)

Acceptable diluents


2 g / 0.25 g

4 g / 0.5 g

50, 100, 150

1.75 – 7.5

0.9% sodium chloride or 5% glucose


2 g / 0.25 g

4 g / 0.5 g

50, 100, 150

0.7 – 3.32

0.9% sodium chloride or 5% glucose

* The dose of aminoglycoside should be based on patient weight, status of infection (serious or life-threatening) and renal function (creatinine clearance).

Compatibility of Tazocin with other aminoglycosides has not been established. Only the concentration and diluents for amikacin and gentamicin with the dose of Tazocin listed in the above table have been established as compatible for co-administration via Y-site infusion. Simultaneous co-administration via Y-site in any manner other than listed above may result in inactivation of the aminoglycoside by Tazocin.

See section 6.2 for incompatibilities.

Any unused medicinal product or waste material should be disposed of in accordance with local requirements.

For single use only. Discard any unused solution.

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Pfizer Healthcare Ireland

9 Riverwalk, National Digital Park,

Citywest Business Campus,

Dublin 24,


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PA 822/98/1

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Date of first authorisation: 22nd December 1992

Date of latest renewal: 22nd December 2007

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TA 5_4 IE

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Active Ingredients

   Piperacillin sodium
   Tazobactam sodium