Phytonadione by Agnitio Inc. PHYTONADIONE tablet

Phytonadione by

Drug Labeling and Warnings

Phytonadione by is a Prescription medication manufactured, distributed, or labeled by Agnitio Inc.. Drug facts, warnings, and ingredients follow.

Drug Details [pdf]

  • 1 INDICATIONS & USAGE

    Phytonadione tablets are indicated for the treatment of adults with the following coagulation disorders which are due to faulty formation of factors II, VII, IX and X when caused by vitamin K deficiency or interference with vitamin K activity.

    • Anticoagulant-induced hypoprothrombinemia caused by coumarin or indanedione derivatives.
    • Hypoprothrombinemia secondary to antibacterial therapy.
    • Hypoprothrombinemia secondary to factors limiting absorpsion or synthesis of vitamin K, e.g., obstructive jaundice, biliary fistula, sprue, ulcerative colitis, celiac disease, intestinal resection, cystic fibrosis of the pancrease, and regional enteritis.
    • Other drug-induced hypoprothrombinemia where it is definitely shown that the result is due to interference with vitamin K metabolism, e.g., salicylates.

            

  • 2 DOSAGE & ADMINISTRATION

    2.1 Dosing Considerations

    Avoid the oral route when the clinical disorder would prevent proper absorption. Bile salts must be given with the tablets when the endogenous supply of bile to the gastrointestinal tract is deficient. The coagulant effects of phytonadione tablets are not immediate; improvement of international normalized ratio (INR) may take 1 to 8 hours. Interim use of whole blood or component therapy may also be necessary if bleeding is severe.


    Phytonadione tablets will not counteract the anticoagulant action of heparin.


     When phytonadione tablets are used to correct excessive anticoagulant-induced hypoprothrombinemia, anticoagulant therapy still being indicated, the patient is again faced with the clotting hazards existing prior to starting the anticoagulant therapy. Phytonadione tablets are not a clotting agent, but overzealous therapy with vitamin K1 may restore conditions which originally permitted thromboembolic phenomena. Dosage should be kept as low as possible, and prothrombin time should be checked regularly as clinical conditions indicate.

    2.2 Recommended Dosage

    Anticoagulant-Induced Prothrombin Deficiency in Adults

    The recommended dose to correct excessively prolonged prothrombin times caused by oral anticoagulant therapy is, 2.5 mg to 10 mg or up to 25 mg initially. In some instances 50 mg may be required. Frequency and amount of subsequent doses should be determined by prothrombin time response or clinical condition. If, in 12 to 48 hours after oral administration, the prothrombin time has not been shortened satisfactorily, repeat the dose.


    Repeated large doses of phytonadione tablets are not warranted in liver disease if the response to initial use of the vitamin is unsatisfactory. Failure to respond to phytonadione may indicate a congenital coagulation defect or that the condition being treated is unresponsive to vitamin K.

     

    Hypoprothrombinemia Due to Other Causes in Adults

    If possible, discontinuation or reduction of the dosage of drugs interfering with coagulation mechanisms (such as salicylates, antibiotics) is suggested as an alternative to administering concurrent phytonadione tablets. The severity of the coagulation disorder should determine whether the immediate administration of phytonadione tablets are required in addition to discontinuation or reduction of interfering drugs.


     The recommended dose is 2.5 mg to 25 mg or more (sometimes up to 50 mg). Evaluate INR after 6 to 8 hours, and repeat dose if INR remains prolonged. Modify subsequent dosage (amount and frequency) based upon the INR or clinical condition.

  • 3 DOSAGE FORMS & STRENGTHS

    Phytonadione tablets USP, 5 mg are yellow round shaped scored tablets, debossed with “AP” on top and “5” on bottom of the score-line and plain on the other side.

  • 4 CONTRAINDICATIONS

    Phytonadione tablets are contraindicated in patients with a history of a hypersensitivity reaction to phytonadione or inactive ingredients [see DESCRIPTION (11)].

  • 6 ADVERSE REACTIONS

    The following adverse reactions associated with the use of parenteral phytonadione were identified in clinical studies or postmarketing reports. Because some of these reactions were reported voluntarily from a population of uncertain size, it is not always possible to reliably estimate their frequency or establish a causal relationship to drug exposure.


    Severe hypersensitivity reactions, including anaphylactoid reactions and deaths, have been reported following parenteral administration. The majority of these reported events occurred following intravenous administration.


    Transient “flushing sensations” and “peculiar” sensations of taste have been observed with parenteral phytonadione, as well as instances of dizziness, rapid and weak pulse, profuse sweating, brief hypotension, dyspnea, and cyanosis.


     Hyperbilirubinemia has been observed in the newborn following administration of parenteral phytonadione. This has occurred primarily with doses above those recommended.

  • 7 DRUG INTERACTIONS

    Anticoagulants

    Phytonadione may induce temporary resistance to prothrombin-depressing anticoagulants, especially when larger doses of phytonadione are used. Should this occur, higher doses of anticoagulant therapy may be needed when resuming anticoagulant therapy or a change in therapy to a different class of anticoagulant may be necessary (i.e., heparin sodium).


     Phytonadione does not affect the anticoagulant action of heparin.

  • 8 USE IN SPECIFIC POPULATIONS

    8.1 Pregnancy

    Risk Summary

    Published studies with the use of phytonadione during pregnancy have not reported a clear association with phytonadione and adverse developmental outcomes [see Data]. There are maternal and fetal risks associated with vitamin K deficiency during pregnancy [see Clinical Considerations]. Animal reproduction studies have not been conducted with phytonadione.


    The estimated background risk for the indicated population is unknown. All pregnancies have a background risk of birth defect, loss or other adverse outcomes. In the U.S. general population, the estimated background risk of major birth defects and miscarriage in clinically recognized pregnancies is 2% to 4% and 15% to 20%, respectively.


    Clinical Considerations

    Disease-associated maternal and/or embryo/fetal risk

    Pregnant women with vitamin K deficiency hypoprothrombinemia may be at increased risk for bleeding diatheses during pregnancy and hemorrhagic events at delivery. Subclinical vitamin K deficiency during pregnancy has been implicated in rare cases of fetal intracranial hemorrhage.


    Data

    Human Data

    Phytonadione has been measured in cord blood of infants whose mothers were treated with phytonadione during pregnancy in concentrations lower than seen in maternal plasma. Administration of vitamin K1 to pregnant women shortly before delivery increased both maternal and cord blood concentrations. Published data do not report a clear association with phytonadione and adverse maternal or fetal outcomes when used during pregnancy. However, these studies cannot definitively establish the absence of any risk because of methodologic limitations including small sample size and lack of blinding.

     

    Animal Data

     In pregnant rats receiving vitamin K1 orally, fetal plasma and liver concentrations increased following administration, supporting placental transfer.

    8.2 Lactation

    Risk Summary

     Phytonadione is present in breastmilk. There are no data on the effects of phytonadione on the breastfed child or on milk production. The developmental and health benefits of breastfeeding should be considered along with the clinical need for phytonadione and any potential adverse effects on the breastfed child from phytonadione or from the underlying maternal condition.

    8.4 Pediatric Use

    Safety and effectiveness in pediatric patients have not been established with phytonadione. Hemolysis, jaundice, and hyperbilirubinemia in newborns, particularly in premature infants, have been reported with vitamin K.

    8.5 Geriatric Use

    Clinical studies of phytonadione did not include sufficient numbers of subjects aged 65 and over to determine whether they respond differently from younger subjects. Other reported clinical experience has not identified differences in responses between the elderly and younger patients. In general, dose selection for an elderly patient should be cautious, usually starting at the low end of the dosing range, reflecting the greater frequency of decreased hepatic, renal, or cardiac function, and of concomitant disease or other drug therapy.

  • 11 DESCRIPTION

    Phytonadione is a vitamin K replacement, which is a clear, yellow to amber, viscous, and nearly odorless liquid. It is insoluble in water, soluble in chloroform and slightly soluble in ethanol. It has a molecular weight of 450.7.

    Phytonadione is 2-methyl-3-phytyl-1, 4-naphthoquinone. Its empirical formula is C31H46O2 and its structural formula is:

      

    phytonadione-structure-jpg

    Phytonadione tablets, USP for oral administration contain 5 mg of phytonadione, USP and are yellow round shaped scored tablets, debossed with “AP” on top and “5” on bottom of the score-line and plain on the other side. Inactive ingredients are microcrystalline cellulose, lactose monohydrate, pregelatinized starch, colloidal silicon dioxide, and magnesium stearate.

  • 12 CLINICAL PHARMACOLOGY

    12.1 Mechanism of Action

    Phytonadione tablets possess the same type and degree of activity as does naturally-occurring vitamin K, which is necessary for the production via the liver of active prothrombin (factor II), proconvertin (factor VII), plasma thromboplastin component (factor IX), and Stuart factor (factor X). The prothrombin test is sensitive to the levels of three of these four factors – II, VII, and X. Vitamin K is an essential cofactor for a microsomal enzyme that catalyzes the posttranslational carboxylation of multiple, specific, peptide-bound glutamic acid residues in inactive hepatic precursors of factors II, VII, IX, and X. The resulting gamma-carboxyglutamic acid residues convert the precursors into active coagulation factors that are subsequently secreted by liver cells into the blood.


     In normal animals and humans, phytonadione is virtually devoid of pharmacodynamic activity. However, in animals and humans deficient in vitamin K, the pharmacological action of vitamin K is related to its normal physiological function, that is, to promote the hepatic biosynthesis of vitamin K-dependent clotting factors.

    12.2 Pharmacodynamics

    Phytonadione tablets generally exert their effect within 6 to 10 hours.

    12.3 Pharmacokinetics

    Absorption

    Oral phytonadione is adequately absorbed from the gastrointestinal tract only if bile salts are present.

    Distribution

    After absorption, phytonadione is initially concentrated in the liver, but the concentration declines rapidly. Very little vitamin K accumulates in tissues.

    Elimination

     Little is known about the metabolic fate of vitamin K. Almost no free unmetabolized vitamin K appears in bile or urine.

  • 13 NONCLINICAL TOXICOLOGY

    13.1 Carcinogenesis & Mutagenesis & Impairment Of Fertility

    Studies of carcinogenicity or impairment of fertility have not been performed with phytonadione. Phytonadione at concentrations up to 2,000 mcg/plate, with or without metabolic activation, was negative in the Ames microbial mutagen test.

  • 16 HOW SUPPLIED/STORAGE AND HANDLING

    Phytonadione Tablets USP, 5 mg are supplied as yellow round shaped scored tablets, debossed with “AP” on top and “5” on bottom of the score-line and plain on the other side.

    They are supplied as follows:

    NDC 72134-008-01 bottles of 100


    Storage

    Store at 20°C to 25°C (68°F to 77°F); excursions permitted between 15°C to 30°C (59°F to 86°F) [see USP Controlled Room Temperature].

    Always protect phytonadione tablets, USP from light.

     Store in tightly closed original container and carton until contents have been used.

  • 17 PATIENT COUNSELING INFORMATION

    Vitamin K1 is fairly rapidly degraded by light; therefore, advise patients to always protect phytonadione tablets from light. Store phytonadione tablets in closed original carton until contents have been used [see HOW SUPPLIED/STORAGE AND HANDLING (16)].

     

    Manufactured by,

    Agnitio Inc.,

    N 800 County Road CB,

    Appleton, Wisconsin 54914, USA.


     Revision: February 2022

  • PACKAGE LABEL.PRINCIPAL DISPLAY PANEL

    phytonadione-container

    phytonadione-carton

  • INGREDIENTS AND APPEARANCE
    PHYTONADIONE 
    phytonadione tablet
    Product Information
    Product TypeHUMAN PRESCRIPTION DRUGItem Code (Source)NDC: 72134-008
    Route of AdministrationORAL
    Active Ingredient/Active Moiety
    Ingredient NameBasis of StrengthStrength
    PHYTONADIONE (UNII: A034SE7857) (PHYTONADIONE - UNII:A034SE7857) PHYTONADIONE5 mg
    Inactive Ingredients
    Ingredient NameStrength
    CELLULOSE, MICROCRYSTALLINE (UNII: OP1R32D61U)  
    LACTOSE MONOHYDRATE (UNII: EWQ57Q8I5X)  
    STARCH, CORN (UNII: O8232NY3SJ)  
    SILICON DIOXIDE (UNII: ETJ7Z6XBU4)  
    MAGNESIUM STEARATE (UNII: 70097M6I30)  
    Product Characteristics
    ColorYELLOWScore2 pieces
    ShapeROUNDSize7mm
    FlavorImprint Code AP;5
    Contains    
    Packaging
    #Item CodePackage DescriptionMarketing Start DateMarketing End Date
    1NDC: 72134-008-01100 in 1 BOTTLE; Type 0: Not a Combination Product02/11/2022
    Marketing Information
    Marketing CategoryApplication Number or Monograph CitationMarketing Start DateMarketing End Date
    ANDAANDA21333602/11/2022
    Labeler - Agnitio Inc. (042097505)
    Establishment
    NameAddressID/FEIBusiness Operations
    Agnitio Inc.042097505MANUFACTURE(72134-008)
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