ZINNAT Cefuroxime Axetil 250mg Tablet 1's
Indications/Uses
It is indicated for the treatment of infections caused by susceptible bacteria.
Susceptibility to Cefuroxime (as axetil) (Zinnat) will vary with geography and time and local susceptibility data should be consulted where available (see Pharmacology: Pharmacodynamics under Actions).
Indications include: upper respiratory tract infections for example, ear, nose and throat infections, such as otitis media, sinusitis, tonsillitis and pharyngitis; lower respiratory tract infections for example, pneumonia, acute bronchitis, and acute exacerbations of chronic bronchitis; genito-urinary tract infections for example, pyelonephritis, cystitis and urethritis; skin and soft tissue infections for example, furunculosis, pyoderma and impetigo; gonorrhoea, acute uncomplicated gonococcal urethritis, and cervicitis; treatment of early Lyme disease and subsequent prevention of late Lyme disease.
Tablet: Cefuroxime is also available as the sodium salt (Zinacef) for parenteral administration. This permits the use of sequential therapy with the same antibiotic, when a change from parenteral to oral therapy is clinically indicated.
Where appropriate Cefuroxime (as axetil) (Zinnat) is effective when used following initial parenteral cefuroxime sodium (Zinacef) in the treatment of pneumonia and acute exacerbations of chronic bronchitis.
Dosage/Direction for Use
Tablet: Cefuroxime (as axetil) (Zinnat) should be taken after food for optimum absorption.
Suspension: For optimal absorption cefuroxime axetil should be taken with food.
Adults: See Table 2.
Acute exacerbations of chronic bronchitis: 750 mg Cefuroxime sodium (Zinacef) three times a day or twice a day (i.v. or i.m.) for 48 to 72 hours, followed by Cefuroxime (as axetil) (Zinnat) oral therapy 500 mg twice a day for 5 to 10 days.
Duration of both parenteral and oral therapy is determined by the severity of the infection and the clinical status of the patient.
Children: Tablet: See Table 3.
There is no experience of using Cefuroxime (as axetil) (Zinnat) in children under the age of 3 months.
Suspension: There is no clinical trial data available on the use of Cefuroxime axetil (Zinnat) in children under the age of 3 months.
In infants and children, it may be preferable to adjust dosage according to weight or age. The dose in infants and children 3 months to 12 years is 10 mg/kg twice daily for most infections, to a maximum of 250 mg daily. In otitis media or more severe infections the recommended dose is 15 mg/kg twice daily to a maximum of 500 mg daily. In Lyme disease, the recommended dose is 15 mg/kg twice daily to a maximum of 500 mg daily for 14 days (range 10 to 21 days).
The following two tables, divided by age group and weight, serve as a guideline for simplified administration from measuring spoons (5 mL) for the 125 mg/5 mL or the 250 mg/5 mL multi-dose suspension. (See Tables 4 and 5.)
If required, the dosing syringe may also be used in older children (refer to the dosing tables as follows).
The recommended doses for the paediatric dosing syringe are expressed in mL or mg and according to bodyweight in the following tables. (Countries must select the relevant columns as required). (See Tables 6 and 7.)
Renal Impairment: Cefuroxime is primarily excreted by the kidneys. In patients with markedly impaired renal function it is recommended that the dosage of cefuroxime be reduced to compensate for its slower excretion (see the table as follows). (See Table 8.)
Overdosage
Treatment: Serum levels of cefuroxime can be reduced by haemodialysis and peritoneal dialysis.
Administration
Contraindications
Special Precautions
As with other antibiotics, use of Cefuroxime (as axetil) (Zinnat) may result in the overgrowth of Candida. Prolonged use may also result in the overgrowth of other non-susceptible organisms (e.g. enterococci and Clostridium difficile), which may require interruption of treatment.
Pseudomembranous colitis has been reported with the use of antibiotics, and may range in severity from mild to life-threatening. Therefore, it is important to consider its diagnosis in patients who develop diarrhoea during or after antibiotic use. If prolonged or significant diarrhoea occurs or the patient experiences abdominal cramps, treatment should be discontinued immediately and the patient investigated further.
Tablet: The Jarisch-Herxheimer reaction has been seen following Cefuroxime (as axetil) (Zinnat) treatment of Lyme disease. It results directly from the bactericidal activity of Cefuroxime (as axetil) (Zinnat) on the causative organism of Lyme disease, the spirochaete, Borrelia burgdorferi. Patients should be reassured that this is a common and usually self-limiting consequence of antibiotic treatment of Lyme disease.
With a sequential therapy regimen the timing of change to oral therapy is determined by severity of the infection, clinical status of the patient and susceptibility of the pathogens involved. If there is no clinical improvement within 72 hours, then the parenteral course of treatment must be continued.
Refer to the relevant prescribing information for cefuroxime sodium before initiating sequential therapy.
Suspension: The sucrose content of Cefuroxime axetil (Zinnat) suspension and granules should be taken into account when treating diabetic patients, and appropriate advice provided.
Cefuroxime axetil (Zinnat) suspension contains aspartame, which is a source of phenylalanine and so should be used with caution in patients with phenylketonuria.
Ability to perform tasks that require judgement, motor or cognitive skills: As this medicine may cause dizziness, patients should be warned to be cautious when driving or operating machinery.
Use In Pregnancy & Lactation
Adverse Reactions
The frequency categories assigned to the adverse reactions as follows are estimates, as for most reactions suitable data (for example from placebo-controlled studies) for calculating incidence were not available. In addition, the incidence of adverse reactions associated with Cefuroxime axetil (Zinnat) may vary according to the indication.
Data from large clinical studies were used to determine the frequency of very common to rare undesirable effects. The frequencies assigned to all other undesirable effects (i.e. those occurring at <1/10,000) were mainly determined using post-marketing data and refer to a reporting rate rather than true frequency. Placebo-controlled trial data were not available. Where incidences have been calculated from clinical trial data, these were based on drug-related (investigator assessed) data.
The following convention has been used for the classification of frequency: very common ≥1/10, common ≥1/100 to <1/10, uncommon ≥1/1000 to <1/100, rare ≥1/10,000 to <1/1000, very rare <1/10,000.
Tablet: Infections and infestations: Common: Overgrowth of Candida.
Blood and lymphatic system disorders: Common: *Eosinophilia; Uncommon: *Positive Coombs' test, *thrombocytopenia, *leukopenia (sometimes profound); Very rare: *Haemolytic anaemia.
Cephalosporins as a class tend to be absorbed onto the surface of red cells membranes and react with antibodies directed against the drug to produce a positive Coombs' test (which can interfere with cross-matching of blood) and very rarely haemolytic anaemia.
Immune system disorders: *Hypersensitivity reactions including: Uncommon: *Skin rashes; Rare: *Urticaria, *pruritus; Very rare: *Drug fever, *serum sickness, *anaphylaxis.
Nervous system disorders: Common: *Headache, dizziness.
Gastrointestinal disorders: Common: *Gastrointestinal disturbances including *diarrhoea, *nausea, abdominal pain; Uncommon: *Vomiting; Rare: *Pseudomembranous colitis (see Precautions).
Hepatobiliary disorders: Common: *Transient increases of hepatic enzyme levels, [ALT (SGPT), AST (SGOT), LDH]; Very rare: *Jaundice (predominantly cholestatic), *hepatitis.
Skin and subcutaneous tissue disorders: Very rare: *Erythema multiforme, *Stevens-Johnson syndrome, *toxic epidermal necrolysis (exanthematic necrolysis).
See also Immune system disorders as previously mentioned.
Suspension: Infections and infestations: Common: Overgrowth of Candida.
Blood and lymphatic system disorders: Common: Eosinophilia; Uncommon: Positive Coombs' test, thrombocytopenia, leukopenia (sometimes profound); Very rare: Haemolytic anaemia.
Cephalosporins as a class tend to be absorbed onto the surface of red cells membranes and react with antibodies directed against the drug to produce a positive Coombs' test (which can interfere with cross-matching of blood) and very rarely haemolytic anaemia.
Immune system disorders: Hypersensitivity reactions including: Uncommon: Skin rashes; Rare: Urticaria, pruritus; Very rare: Drug fever, serum sickness, anaphylaxis.
Nervous system disorders: Common: Headache, dizziness.
Gastrointestinal disorders: Common: Gastrointestinal disturbances including diarrhoea, nausea, abdominal pain; Uncommon: Vomiting; Rare: Pseudomembranous colitis (see Precautions).
Hepatobiliary disorders: Common: Transient increases of hepatic enzyme levels, [ALT (SGPT), AST (SGOT), LDH]; Very rare: Jaundice (predominantly cholestatic), hepatitis.
Skin and subcutaneous tissue disorders: Very rare: Erythema multiforme, Stevens-Johnson syndrome, toxic epidermal necrolysis (exanthematic necrolysis).
See also Immune system disorders as previously mentioned.
Drug Interactions
In common with other antibiotics, Cefuroxime (as axetil) (Zinnat) may affect the gut flora, leading to lower oestrogen reabsorption and reduced efficacy of combined oral contraceptives.
As a false negative result may occur in the ferricyanide test, it is recommended that either the glucose oxidase or hexokinase methods are used to determine blood/plasma glucose levels in patients receiving Cefuroxime (as axetil) (Zinnat). This antibiotic does not interfere in the alkaline picrate assay for creatinine.
Caution For Usage
Always shake the bottle vigorously before taking the medication.
The reconstituted suspension when refrigerated between 2 and 8°C can be kept for up to 10 days.
If desired Cefuroxime axetil (Zinnat) suspension can be further diluted from multidose bottles in cold fruit juices, or milk drinks and should be taken immediately.
Directions for reconstituting suspension in multidose bottles: Shake the bottle to loosen the content. All the granules should be free-flowing in the bottle. Remove the cap and the heat-seal membrane. If the latter is damaged or not present, return the product to the pharmacist.
Add an amount of cold water up to the volume line on the cup provided. If the water was previously boiled it must be allowed to cool to room temperature before adding. Do not mix Cefuroxime axetil (Zinnat) oral suspension with hot or warm liquids. Cold water must be used to prevent the suspension becoming too thick.
Pour the total amount of cold water into the bottle. Replace the cap. Allow the bottle to stand to allow the water to fully soak through the granules; this should take about one-minute.
Invert the bottle and shake well (for at least 15 seconds) until all the granules have mixed with the water.
Turn the bottle into an upright position and shake well for at least one-minute until all the granules have blended with the water.
Store the cefuroxime axetil suspension immediately at between 2 and 8°C (do not freeze) and let it rest for at least one hour before taking the first dose. The reconstituted suspension when refrigerated between 2 and 8°C can be kept for up to 10 days.
Always shake the bottle well before taking the medication. A dosing syringe or spoon is provided for the administration of each dose.
If desired, cefuroxime axetil suspension from multidose bottles can be further diluted in cold fruit juices, or cold milk drinks and should be taken immediately after mixing.
Directions for using the dosing syringe: 1. Remove the bottle cap and insert the syringe-collar assembly into the neck of the bottle. Press it down completely until the collar fits in the neck firmly. Invert the bottle and syringe.
2. Pull the plunger up the barrel until the barrel's rim is aligned with the mark on the plunger corresponding to the required dose.
3. Turn the bottle and syringe into an upright position. While holding onto the syringe and the plunger to ensure that the plunger does not move, remove the syringe from the bottle, leaving the plastic collar in the bottle neck.
4. With the patient seated in an upright position, place the tip of the syringe just inside the patients mouth, pointing towards the inside of the cheek.
5. Press the plunger of the syringe in slowly to expel the medicine without causing choking.
6. After giving the dose replace the bottle cap without removing the plastic collar. Dismantle the syringe and wash it thoroughly in water. Allow the plunger and the barrel to dry naturally.
The reconstituted suspension or granules should not be mixed with hot liquids.
Storage
Protect from light.
Suspension: Cefuroxime axetil (Zinnat) Granules for suspension should be stored at temperatures not exceeding 30°C.
Multi dose bottles: The reconstituted suspension must be refrigerated immediately between 2 and 8°C, and can be kept for up to 10 days.
Further diluted suspension added in children's cold fruit juices or milk should be taken immediately.
Action
Following administration of Cefuroxime (as axetil) (Zinnat) tablets peak serum levels (2.1 mg/L for a 125 mg dose, 4.1 mg/L for a 250 mg dose, 7.0 mg/L for a 500 mg dose and 13.6 mg/L for a 1 g dose) occur approximately 2 to 3 hours after dosing when taken after food.
Suspension:After oral administration, Cefuroxime axetil (Zinnat) is absorbed from the gastrointestinal tract and rapidly hydrolysed in the intestinal mucosa and blood to release cefuroxime into the circulation.
Absorption of cefuroxime axetil suspension is enhanced in the presence of food.
Following administration of Cefuroxime axetil (Zinnat) tablets peak serum levels (2.1 mg/L for a 125 mg dose, 4.1 mg/L for a 250 mg dose, 7.0 mg/L for a 500 mg dose and 13.6 mg/L for a 1 g dose) occur approximately 2 to 3 hours after dosing when taken with food.
The rate of absorption of cefuroxime from the suspension compared with the tablets is reduced, leading to later, lower peak serum levels and slightly reduced systemic bioavailability (4-17% less).
Distribution: Protein binding has been variously stated as 33 to 50% depending on the methodology used.
Metabolism: Cefuroxime is not metabolized.
Elimination: Cefuroxime is excreted by glomerular filtration and tubular secretion.
Concurrent administration of probenecid increases the area under the mean serum concentrations time curve by 50%.
Tablet: The serum half-life is between 1 and 1.5 hours.
Renal impairment: Cefuroxime pharmacokinetics have been investigated in patients with various degrees of renal impairment. Cefuroxime elimination half-life increases with decrease in renal function which serves as the basis for dosage adjustment recommendations in this group of patients (see Dosage & Administration). In patients undergoing haemodialysis, at least 60% of the total amount of cefuroxime present in the body at the start of dialysis will be removed during a 4-hour dialysis period. Therefore, an additional single dose of cefuroxime should be administered following the completion of haemodialysis.
Toxicology: Pre-clinical Safety Data: Animal toxicity studies indicated that cefuroxime axetil is of low toxicity with no significant findings.
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Features
- Cefuroxime