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Flucytosine (Flucytosine)

Trade Name : flucytosine

West-Ward Pharmaceuticals Corp

CAPSULE

Strength 250 mg/1

FLUCYTOSINE Nucleoside Analog [EXT],Nucleoside Analog Antifungal [EPC]

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Trade Marks displayed in compliance with provisions of: Trademark Act, 1999 u/s 30 and 30 (1) of "Fair use"

GNH India is WHO GDP and ISO 9001 2015 Certified Pharmaceutical Wholesaler/ Supplier/ Exporters/ Importer from India of Flucytosine (Flucytosine) which is also known as flucytosine and Manufactured by West-Ward Pharmaceuticals Corp. It is available in strength of 250 mg/1 per ml. Read more

Flucytosine (Flucytosine) is supplied for Tenders/ Emergency imports/ Un - licensed, Specials, Orphan drug/ Name patient line/ RLD supplies/ Reference listed drugs/ Comparator Drug/ Bio-Similar/ Innovator samples For Clinical trials.  Click to know price.     Read less

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We deliver your medicines through a validated cold chain shipment process. This process is used as these medicines need to manufactured, transported and stored at very specific temperatures, utilizing thermal and refrigerated packaging methods.

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We deliver your medicines through a validated cold chain shipment process. This process is used as these medicines need to manufactured, transported and stored at very specific temperatures, utilizing thermal and refrigerated packaging methods.

We deliver your medicines through a validated cold chain shipment process. This process is used as these medicines need to manufactured, transported and stored at very specific temperatures, utilizing thermal and refrigerated packaging methods.

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  • No data
  • Use with extreme caution in patients with impaired renal function. Close monitoring of hematologic, renal and hepatic status of all patients is essential. These instructions should be thoroughly reviewed before administration of Flucytosine Capsules.
  • No data
  • Flucytosine Capsules USP, an antifungal agent, is available as 250 mg and 500 mg capsules for oral administration. In addition to the active ingredient of flucytosine USP, each capsule contains: colloidal silicon dioxide, lactose monohydrate, magnesium stearate and pregelatinized starch. The gelatin capsule shells contains: D&C Yellow #10, FD&C Green #3, FD&C Red #40, gelatin and titanium dioxide. The 250 mg capsule also contains: FD&C Blue #1 and FD&C Yellow #6. In addition to the ingredients listed above, each capsule contains: ammonium hydroxide, ethanol, iron oxide black, isopropyl alcohol, n-butyl alcohol, propylene glycol and shellac glaze used in the black monogramming ink.
  • Chemically, flucytosine is 5-fluorocytosine, a fluorinated pyrimidine which is related to fluorouracil and floxuridine. It is a white to off-white powder with a molecular weight of 129.09 and the following structural formula:
  • Flucytosine is rapidly and virtually completely absorbed following oral administration. Flucytosine is not metabolized significantly when given orally to man. Bioavailability estimated by comparing the area under the curve of serum concentrations after oral and intravenous administration showed 78% to 89% absorption of the oral dose. Peak serum concentrations of 30 to 40 mcg/mL were reached within 2 hours of administration of a 2 g oral dose to normal subjects. Other studies revealed mean serum concentrations of approximately 70 to 80 mcg/mL 1 to 2 hours after a dose in patients with normal renal function receiving a 6-week regimen of flucytosine (150 mg/kg/day given in divided doses every 6 hours) in combination with amphotericin B. The half-life in the majority of healthy subjects ranged between 2.4 and 4.8 hours. Flucytosine is excreted via the kidneys by means of glomerular filtration without significant tubular reabsorption. More than 90% of the total radioactivity after oral administration was recovered in the urine as intact drug. Flucytosine is deaminated (probably by gut bacteria) to 5-fluorouracil. The area under the curve (AUC) ratio of 5-fluorouracil to flucytosine is 4%. Approximately 1% of the dose is present in the urine as the u03b1-fluoro-u03b2-ureido-propionic acid metabolite. A small portion of the dose is excreted in the feces.
  • The half-life of flucytosine is prolonged in patients with renal insufficiency; the average half-life in nephrectomized or anuric patients was 85 hours (range: 29.9 to 250 hours). A linear correlation was found between the elimination rate constant of flucytosine and creatinine clearance.
  • In vitro
  • Limited data are available regarding the pharmacokinetics of Flucytosine administered to neonatal patients being treated for systemic candidiasis. After five days of continuous therapy, median peak levels in infants were 19.6 mcg/mL, 27.7 mcg/mL, and 83.9 mcg/mL at doses of 25 mg/kg (N=3), 50 mg/kg (N=4), and 100 mg/kg (N=3), respectively. Mean time to peak serum levels was of 2.5 u00b1 1.3 hours, similar to that observed in adult patients. A good deal of interindividual variability was noted, which did not correlate with gestational age. Some patients had serum levels > 100 mcg/mL, suggesting a need for drug level monitoring during therapy. In another study, serum concentrations were determined during flucytosine therapy in two patients (total assays performed =10). Median serum flucytosine concentrations at steady state were calculated to be 57 u00b1 10 mcg/mL (doses of 50 to 125 mg/kg/day, normalized to 25 mg/kg per dose for comparison). In three infants receiving flucytosine 25 mg/kg/day (four divided doses), a median flucytosine half-life of 7.4 hours was observed, approximately double that seen in adult patients. The concentration of flucytosine in the cerebrospinal fluid of one infant was 43 mcg/mL 3 hours after a 25 mg oral dose, and ranged from 20 to 67 mg/L in another neonate receiving oral doses of 120 to 150 mg/kg/day.
  • Flucytosine is taken up by fungal organisms via the enzyme cytosine permease. Inside the fungal cell, flucytosine is rapidly converted to fluorouracil by the enzyme cytosine deaminase. Fluorouracil exerts its antifungal activity through the subsequent conversion into several active metabolites, which inhibit protein synthesis by being falsely incorporated into fungal RNA or interfere with the biosynthesis of fungal DNA through the inhibition of the enzyme thymidylate synthetase.
  • Activity In Vitro:
  • Flucytosine has been shown to be active against most strains of the following microorganisms n
  • Susceptibility Testing:
  • For specific information regarding susceptibility test interpretive criteria and associated test methods and quality control standards recognized by FDA for this drug, please see: .
  • Drug Resistance:
  • Flucytosine resistance may arise from a mutation of an enzyme necessary for the cellular uptake or metabolism of flucytosine or from an increased synthesis of pyrimidines, which compete with the active metabolites of flucytosine (fluorinated antimetabolites). Resistance to flucytosine has been shown to develop during monotherapy after prolonged exposure to the drug.
  • Drug Combination
  • Antifungal synergism between flucytosine and polyene antibiotics, particularly amphotericin B has been reported . Flucytosine is usually administered in combination with amphotericin B due to lack of cross-resistance and reported synergistic activity of both drugs.
  • Flucytosine is indicated only in the treatment of serious infections caused by susceptible strains of and/or .
  • Candida
  • Septicemia, endocarditis and urinary system infections have been effectively treated with flucytosine. Limited trials in pulmonary infections justify the use of flucytosine.
  • Cryptococcus
  • Meningitis and pulmonary infections have been treated effectively. Studies in septicemias and urinary tract infections are limited, but good responses have been reported.
  • Flucytosine should be used in combination with amphotericin B for the treatment of systemic candidiasis and cryptococcosis because of the emergence of resistance to flucytosine .
  • Flucytosine should not be used in patients with a known hypersensitivity to the drug.
  • Flucytosine must be given with extreme caution to patients with impaired renal function. Since flucytosine is excreted primarily by the kidneys, renal impairment may lead to accumulation of the drug. Flucytosine serum concentrations should be monitored to determine the adequacy of renal excretion in such patients. Dosage adjustments should be made in patients with renal insufficiency to prevent progressive accumulation of active drug.
  • Flucytosine must be given with extreme caution to patients with bone marrow depression. Patients may be more prone to depression of bone marrow function if they: 1) have a hematologic disease, 2) are being treated with radiation or drugs which depress bone marrow, or 3) have a history of treatment with such drugs or radiation. Bone marrow toxicity can be irreversible and may lead to death in immunosuppressed patients. Frequent monitoring of hepatic function and of the hematopoietic system is indicated during therapy.
  • No data
  • The adverse reactions which have occurred during treatment with flucytosine are grouped according to organ system affected.
  • Cardiovascular:
  • Respiratory:
  • Dermatologic:
  • Gastrointestinal:
  • Genitourinary:
  • Hematologic:
  • Neurologic:
  • Psychiatric:
  • Miscellaneous:
  • To report SUSPECTED ADVERSE REACTIONS, contact West-Ward Pharmaceuticals Corp. at 1-800-962-8364 or FDA at 1-800-FDA-1088 or www.fda.gov/medwatch.
  • There is no experience with intentional overdosage. It is reasonable to expect that overdosage may produce pronounced manifestations of the known clinical adverse reactions. Prolonged serum concentrations in excess of 100 mcg/mL may be associated with an increased incidence of toxicity, especially gastrointestinal (diarrhea, nausea, vomiting), hematologic (leukopenia, thrombocytopenia) and hepatic (hepatitis).
  • In the management of overdosage, prompt gastric lavage or the use of an emetic is recommended. Adequate fluid intake should be maintained, by the intravenous route if necessary, since flucytosine is excreted unchanged via the renal tract. The hematologic parameters should be monitored frequently; liver and kidney function should be carefully monitored. Should any abnormalities appear in any of these parameters, appropriate therapeutic measures should be instituted.
  • Since hemodialysis has been shown to rapidly reduce serum concentrations in anuric patients, this method may be considered in the management of overdosage.
  • The usual dosage of flucytosine is 50 to 150 mg/kg/day administered in divided doses at 6-hour intervals. Nausea or vomiting may be reduced or avoided if the capsules are given a few at a time over a 15-minute period. If the BUN or the serum creatinine is elevated, or if there are other signs of renal impairment, the initial dose should be at the lower level .
  • Flucytosine should be used in combination with amphotericin B for the treatment of systemic candidiasis and cryptococcosis because of the emergence of resistance to flucytosine .
  • Flucytosine Capsules USP
  • The 250 mg capsules are supplied as green opaque cap and grey opaque body with u201c54 986u201d printed in black ink on the cap and body, containing a white to off-white powder.
  • NDC 0054-0427-25: Bottle of 100 Capsules
  • The 500 mg capsules are supplied as grey opaque cap and white opaque body with u201c54 866u201d printed in black ink on the cap and body, containing a white to off-white powder.
  • NDC 0054-0428-25: Bottle of 100 Capsules
  • Store at 20u02da to 25u00b0C (68u02da to 77u00b0F). [See USP Controlled Room Temperature.]
  • Distr. by: n
  • Pharmaceuticals Corp.
  • Eatontown, NJ 07724
  • 10008275/03
  • Revised February 2019
  • Flucytosine Capsules USP, 250 mg
  • 0054-0427-25, Rx only
  • Flucytosine Capsules USP, 500 mg
  • 0054-0428-25, Rx only
  • Flucytosine Capsules USP, 250 mg
  • 0054-0427-20, Rx only
  • Flucytosine Capsules USP, 500 mg
  • 0054-0428-20, Rx only

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