Label: CHORULON- gonadotrophin, chorionic kit

  • NDC Code(s): 57926-475-62
  • Packager: Merck Sharp & Dohme Corp.
  • Category: PRESCRIPTION ANIMAL DRUG LABEL
  • DEA Schedule: None
  • Marketing Status: New Animal Drug Application

Drug Label Information

Updated November 13, 2023

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  • SPL UNCLASSIFIED SECTION

    Approved by FDA under NADA # 140-927

    FOR ANIMAL USE ONLY

  • SPL UNCLASSIFIED SECTION

    CAUTION

    Federal law restricts this drug to use by or on the order of a licensed veterinarian.

  • DESCRIPTION

    DESCRIPTION

    CHORULON® is a freeze-dried preparation of chorionic gonadotropin (human Chorionic Gonadotropin or hCG) for intramuscular administration after reconstitution. When reconstituted with the accompanying sterile diluent, each 10 mL vial contains 10,000 I.U. chorionic gonadotropin (equivalent to 10,000 USP Units chorionic gonadotropin) and 10 mg mannitol, with mono- and disodium phosphate to adjust the pH of the solution.

  • MECHANISM OF ACTION

    ACTION

    Chorionic gonadotropin has luteinizing hormone-like activity with little or no follicle stimulating or estrogenic activity.

  • INDICATIONS & USAGE

    INDICATIONS

    COWS: CHORULON® is indicated for intramuscular use in cows for the treatment of nymphomania (frequent or constant heat) due to cystic ovaries.

    FINFISH: CHORULON® is indicated for use as an aid in improving spawning function in male and female brood finfish.

  • DOSAGE & ADMINISTRATION

    DOSAGE AND ADMINISTRATION

    To reconstitute, transfer the contents of one vial of sterile diluent into one vial of freeze-dried powder. The resulting 10 mL of CHORULON® contains 10,000 I.U. chorionic gonadotropin.

    COWS: The contents of one vial (10 mL) of reconstituted CHORULON® should be administered as a single deep intramuscular injection. Dosage may be repeated in 14 days if the animal's behavior or rectal examination of the ovaries indicates the necessity for retreatment.

    FINFISH: CHORULON® should be administered via intramuscular injection just ventral to the dorsal fin for one (1) to three (3) injections. Any single injection should be administered, depending on the fish species, at a dose of 50 to 510 I.U./lb body weight (bw) for males and 67 to 1816 I.U./lb bw for females. Depending on body weight and dose administered, it may be necessary to divide the dose among two or more injection sites to avoid injecting a large volume at a single site.

    Summaries of doses tested in representative fish species are contained within the following tables. The dose of CHORULON® to be used in other species of finfish may differ from those species listed in the tables, but should fall within the suggested range of 50 to 510 I.U./lb bw for males and 67 to 1816 I.U./lb bw for females.

    Table 1: Tested Fish Species/Dose Combinations Found to be Effective
    Nomenclature Common Name, Genus & Species, FamilyTested Dose(s)
    (I.U./lb bw/injection)
    Number of InjectionInjections Interval (h)
    MalesFemales
    Footnotes: 1, nt = not tested
    yellow perch, Perca flavescens, Percidaent167-3001-
    striped bass, Morone saxitilis, Percichthyidae50-50075-2521-
    white bass, Morone chrysops, Percichthyidae65-51091-7501-
    razorback sucker, Xyrauchen texanus, Catostomidaent100324
    walleye, Stizostedion vitreum, Percidae75-400145-8301-372
    red snapper, Lutjanus campechanus, Lutjanidae2505001-
    sauger, Stizostedion canadense, Percidae500500-10001-
    Chinese catfish, Clarius fuscus, Clariidaent18161-
    Table 2: Tested Fish Species/Dose Combinations Found to be Safe
    Nomenclature Common Name, Genus & Species, FamilyTested Dose(s)
    (I.U./lb bw/injection)
    Number of InjectionInjections Interval (h)
    MalesFemales
    white bass, Morone chrysops, Percichthyidae75015001-
    walleye, Stizostedion vitreum, Percidae75015001-
    grass carp, Ctenopharyngodon idella, Cyprinidae250050001-
    channel catfish, Ictalurus punctatus, Ictaluridae250050001-
  • ADVERSE REACTIONS

    ADVERSE REACTIONS

    Chorionic gonadotropin is a protein. in the unlikely event of an anaphylactic reaction, epinephrine should be administered. the administration of an antihistamine may also be indicated.

  • RESIDUE WARNING

    RESIDUE WARNINGS

    No withdrawal period is required for cows or brood finfish treated according to label directions. the total dose administered (all injections combined) should not exceed 25,000 i.u. (25 mL) per fish in fish intended for human consumption.

  • STORAGE AND HANDLING

    STORAGE AND HANDLING PRECAUTIONS

    Store at or below room temperature, 77° F (25°C). Keep out of reach of children. once reconstituted, CHORULON® should be used immediately. unused solution should be disposed of properly and not stored for future use.

  • HOW SUPPLIED

    HOW SUPPLIED

    CHORULON® is supplied in cartons containing five vials of freeze-dried powder and five 10 mL vials of sterile diluent. order Code No. CH-475-1.

  • SPL UNCLASSIFIED SECTION

    Intervet Inc., d/b/a Merck Animal Health
    Rahway, NJ 07065

    Manufactured by:
    Intervet International GmbH
    Unterschleissheim, Germany

    Copyright © 2023 Merck & Co., Inc., Rahway,
    NJ, USA and its affiliates. All rights reserved.

    Rev. 6/2023

    395398 R2

  • PRINCIPAL DISPLAY PANEL - Kit Carton

    5 vials with diluent

    chorulon®
    (chorionic gonadotropin)

    MERCK
    Animal Health

    PRINCIPAL DISPLAY PANEL - Kit Carton
  • INGREDIENTS AND APPEARANCE
    CHORULON 
    gonadotrophin, chorionic kit
    Product Information
    Product TypePRESCRIPTION ANIMAL DRUGItem Code (Source)NDC:57926-475
    Packaging
    #Item CodePackage DescriptionMarketing Start DateMarketing End Date
    1NDC:57926-475-621 in 1 CARTON
    Quantity of Parts
    Part #Package QuantityTotal Product Quantity
    Part 15 VIAL
    Part 25 VIAL 50 mL
    Part 1 of 2
    CHORULON 
    gonadotrophin, chorionic injection, powder, lyophilized, for solution
    Product Information
    Route of AdministrationINTRAMUSCULAR
    Active Ingredient/Active Moiety
    Ingredient NameBasis of StrengthStrength
    CHORIONIC GONADOTROPIN (UNII: 20ED16GHEB) (CHORIONIC GONADOTROPIN - UNII:20ED16GHEB) CHORIONIC GONADOTROPIN10000 [iU]
    Packaging
    #Item CodePackage DescriptionMarketing Start DateMarketing End Date
    11 in 1 VIAL
    Marketing Information
    Marketing CategoryApplication Number or Monograph CitationMarketing Start DateMarketing End Date
    NADANADA14092711/22/1991
    Part 2 of 2
    DILUENT FOR CHORULON 
    sterile phosphate buffered water injection, solution
    Product Information
    Route of AdministrationINTRAMUSCULAR
    Inactive Ingredients
    Ingredient NameStrength
    Water (UNII: 059QF0KO0R)  
    Packaging
    #Item CodePackage DescriptionMarketing Start DateMarketing End Date
    110 mL in 1 VIAL
    Marketing Information
    Marketing CategoryApplication Number or Monograph CitationMarketing Start DateMarketing End Date
    NADANADA14092711/22/1991
    Marketing Information
    Marketing CategoryApplication Number or Monograph CitationMarketing Start DateMarketing End Date
    NADANADA14092711/22/1991
    Labeler - Merck Sharp & Dohme Corp. (001317601)
    Establishment
    NameAddressID/FEIBusiness Operations
    Intervet International GMBH328855635MANUFACTURE
    Establishment
    NameAddressID/FEIBusiness Operations
    Ningbo Renjian Pharmaceutical Group Co., Ltd.529358491API MANUFACTURE