Label: NOROMECTIN PLUS FOR CATTLE- ivermectin and clorsulon injection, solution

  • NDC Code(s): 55529-011-01, 55529-011-02, 55529-011-04, 55529-011-05, view more
  • Packager: Norbrook Laboratories Limited
  • DEA Schedule: None
  • Marketing Status: Abbreviated New Animal Drug Application

Drug Label Information

Updated November 2, 2015

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    ANADA 200-436, Approved by FDA

    (ivermectin and clorsulon) PLUS

    Injection for Cattle

    For the effective treatment and control of internal parasites, including adult liver flukes, and external parasites.

    Consult your veterinarian for assistance in the diagnosis, treatment and control of parasitism.


    The ability of ivermectin to deliver internal and external parasite control has been proven in cattle markets around the world. Now, Norbrook Laboratories Limited combines ivermectin with clorsulon, an effective adult flukicide.

    A single injection of Noromectin® Plus (ivermectin and clorsulon) offers all the benefits of an ivermectin injection plus control of adult Fasciola hepatica.

    The dosage level of clorsulon supplied by Noromectin Plus is effective only against adult liver flukes (Fasciola hepatica).


    Noromectin Plus is a ready-to-use sterile solution containing 1% w/v ivermectin, 10% clorsulon, 40% glycerol formal, and propylene glycol, q.s. ad 100%. It is formulated to deliver the recommended dose level of 200 mcg ivermectin/kg and 2 mg clorsulon/kg given subcutaneously behind the shoulder at the rate of 1 mL per 110 lb (50 kg) body weight.


    Ivermectin is a member of the macrocyclic lactone class of endectocides which have a unique mode of action. Compounds of the class bind selectively and with high affinity to glutamate-gated chloride ion channels which occur in invertebrate nerve and muscle cells. This leads to an increase in the permeability of the cell membrane to chloride ions with hyperpolarization of the nerve or muscle cell, resulting in paralysis and death of the parasite. Compounds of this class may also interact with other ligand-gated chloride channels, such as those gated by the neurotransmitter gamma-aminobutyric acid (GABA).

    The margin of safety for compounds of this class is attributable to the fact that mammals do not have glutamate-gated chloride channels, the macrocyclic lactones have a low affinity for other mammalian ligand-gated chloride channels and they do not readily cross the blood-brain barrier.

    Clorsulon is rapidly absorbed into the circulating blood. Erythrocytes with bound drug as well as plasma are ingested by Fasciola hepatica. Adult Fasciola hepatica are killed by clorsulon because of inhibition of enzymes in the glycolytic pathway, which is their primary source of energy.


    Noromectin Plus Injection is indicated for the effective treatment and control of the following parasites in cattle:

    Gastrointestinal Roundworms (adults and fourth-stage larvae):

    Ostertagia ostertagi (including inhibited O. ostertagi)

    O. lyrata

    Haemonchus placei

    Trichostrongylus axei T. colubriformis

    Cooperia oncophora

    C. punctata

    C. pectinata

    Bunostomum phlebotomum

    Nematodirus helvetianus (adults only)

    N. spathiger (adults only)

    Oesophagostomum radiatum

    Lungworms (adults and fourth-stage larvae):

    Dictyocaulus viviparus

    Liver Flukes:

    Fasciola hepatica (adults only)

    Cattle Grubs (parasitic stages):

    Hypoderma bovis

    H. lineatum

    Sucking Lice:

    Linognathus vituli

    Haematopinus eurysternus Solenopotes capillatus

    Mange Mites (cattle scab*):

    Psoroptes ovis (syn. P. communis var. bovis)

    Sarcoptes scabiei var. bovis

    Persistent Activity

    Ivermectin and clorsulon injection has been proved to effectively control infections and to protect cattle from reinfection with Dictyocaulus viviparus and Oesophagostomum radiatum for 28 days after treatment; Ostertagia ostertagi, Trichostrongylus axei and Cooperia punctata for 21 days after treatment; Haemonchus placei, and Cooperia oncophora for 14 days after treatment.

    * Ivermectin has been approved as a scabicide by USDA/APHIS. Federal regulations require that cattle infested with or exposed to scabies (i.e., infestations with Psoroptes ovis) be treated. Ivermectin when used according to label instructions meets this requirement. Treated cattle may be shipped interstate, but they must not be mixed with other cattle for 14 days following treatment. The federal regulations make no restriction on the movement of cattle not affected with or exposed to scabies. However, individual states have additional regulations to govern the interstate shipment of cattle and the regulatory veterinarian in the state of destination should be consulted for applicable regulations on the use of ivermectin in the control of scabies.


    Noromectin Plus should be given only by subcutaneous injection at a dose volume of 1 mL per 110 lb (50 kg) body weight. This volume will deliver 10 mg ivermectin and 100 mg clorsulon. For example:

    Body Weight (lb)Dose (mL)
    220 2
    330 3
    440 4
    550 5
    660 6
    770 7
    880 8
    990 9
    1100 10

    Noromectin Plus (ivermectin and clorsulon) Injection is to be given subcutaneously only. Animals should be appropriately restrained to achieve the proper route of administration. Use of a 16-gauge, 1/2" to 3/4" sterile needle is recommended. Inject the solution subcutaneously (under the skin) behind the shoulder (see illustration).


    Any single-dose syringe or standard automatic syringe equipment may be used with the 50 mL or 100 mL pack size. When using the 250 mL, 500 mL or 1000 mL pack size, use only automatic syringe equipment.

    Use sterile equipment and sanitize the injection site by applying a suitable disinfectant. Clean, properly disinfected needles should be used to reduce the potential for injection site infections.

    No special handling or protective clothing is necessary.

    The viscosity of the product increases in cool temperatures. Administering Noromectin Plus at temperatures of 41°F (5°C) or below may be difficult. Users can make dosing easier by warming both the product and injection equipment to about 59°F (15°C).


    In breeding animals (bulls and cows), ivermectin and clorsulon used at the recommended level had no effect on breeding performance.



    Keep this and all drugs out of the reach of children.

    The Material Safety Data Sheet (MSDS) contains more detailed occupational safety information. To report adverse effects, obtain an MSDS or for assistance, contact Norbrook toll free 1-866-591-5777.

    RESIDUE WARNINGS: Do not treat cattle within 21 days of slaughter. Because a withdrawal time in milk has not been established, do not use in female dairy cattle of breeding age. A withdrawal period has not been established for this product in pre-ruminating calves. Do not use in calves to be processed for veal.


    Transitory discomfort has been observed in some cattle following subcutaneous administration. Soft-tissue swelling at the injection site has also been observed. These reactions have disappeared without treatment. Divide doses greater than 10 mL between two injection sites to reduce occasional discomfort or site reaction. Different injection sites should be used for other parenteral products.

    Noromectin Plus Injection has been developed specifically for use in cattle only. This product should not be used in other animal species as severe adverse reactions, including fatalities in dogs, may result.

    For subcutaneous injection in cattle only.

    This product is not for intravenous or intramuscular use.

    When to Treat Cattle with Grubs

    Noromectin Plus effectively controls all stages of cattle grubs. However, proper timing of treatment is important. For most effective results, cattle should be treated as soon as possible after the end of the heel fly (warble fly) season.

    Destruction of Hypoderma larvae (cattle grubs) at the period when these grubs are in vital areas may cause undesirable host-parasite reactions including the possibility of fatalities. Killing Hypoderma lineatum when it is in the tissue surrounding the esophagus (gullet) may cause bloat; killing H. bovis when it is in the vertebral canal may cause staggering or paralysis. These reactions are not specific to treatment with Noromectin Plus, but can occur with any successful treatment of grubs. Cattle should be treated either before or after these stages of grub development. Consult your veterinarian concerning the proper time for treatment. Cattle treated with Noromectin Plus after the end of the heel fly season may be retreated with ivermectin during the winter for internal parasites, mange mites, or sucking lice, without danger of grub-related reactions. A planned parasite control program is recommended.


    Protect product from light.

    Store at 59° to 86°F (15° to 30°C).


    Studies indicate that when ivermectin comes in contact with soil it readily and tightly binds to the soil and becomes inactive over time. Free ivermectin may adversely affect fish and certain aquatic organisms. Do not permit water runoff from feedlots to enter lakes, streams, or ponds. Do not contaminate water by direct application or by improper disposal of drug containers. Dispose of containers in an approved landfill or by incineration. As with other avermectins, ivermectin is excreted in the dung of treated animals and can inhibit the reproduction and growth of pest and beneficial insects that use dung as a source of food and for reproduction. The magnitude and duration of such effects are species and life-cycle specific. When used according to label directions, the product is not expected to have an adverse impact on populations of dung-dependent insects.


    Noromectin Plus Injection is available in five ready-to-use pack sizes:

    The 50 mL pack is a multiple-dose, rubber-capped bottle. Each bottle contains sufficient solution to treat 10 head of 550 lb (250 kg) cattle.

    The 100 mL pack is a multiple-dose, rubber-capped bottle. Each bottle contains sufficient solution to treat 20 head of 550 lb (250 kg) cattle.

    The 250 mL pack is a multiple-dose, rubber-capped bottle designed for use with automatic syringe equipment. Each bottle contains sufficient solution to treat 50 head of 550 lb (250 kg) cattle.

    The 500 mL pack is a multiple-dose, rubber-capped bottle designed for use with automatic syringe equipment. Each bottle contains sufficient solution to treat 100 head of 550 lb (250 kg) cattle.

    The 1000 mL pack is a multiple-dose, rubber-capped bottle designed for use with automatic syringe equipment. Each bottle contains sufficient solution to treat 200 head of 550 lb (250 kg) cattle.

    Restricted Drug - California. Use Only as Directed.

    Made in the UK.

    Norbrook Laboratories Limited,
    Newry, BT35 6PU, Co. Down, Northern Ireland.

    ® Noromectin is a registered
    trademark of
    Norbrook Laboratories

    Norbrook Logo

  • Principal Display Panel - Carton Label

    NDC 55529-011-06

    Noromectin® PLUS
    (ivermectin and clorsulon)

    Injection for Cattle

    Treats 200 - 550 lb Cattle

    For the treatment and control of internal parasites,
    including adult liver flukes, and external parasites.

    1000 mL

    ANADA 200-436,
    Approved by FDA


    Principal Display Panel - Carton Label
  • Principal Display Panel - Vial Label

    NDC 55529-011-06

    Noromectin® PLUS
    (ivermectin and clorsulon)

    Injection for Cattle

    ANADA 200-436,
    Approved by FDA

    1000 mL


    Principal Display Panel - Vial Label
    ivermectin and clorsulon injection, solution
    Product Information
    Product TypeOTC ANIMAL DRUGItem Code (Source)NDC:55529-011
    Route of AdministrationSUBCUTANEOUS
    Active Ingredient/Active Moiety
    Ingredient NameBasis of StrengthStrength
    ivermectin (UNII: 8883YP2R6D) (ivermectin - UNII:8883YP2R6D) ivermectin10 mg  in 1 mL
    clorsulon (UNII: EG1ZDO6LRD) (clorsulon - UNII:EG1ZDO6LRD) clorsulon100 mg  in 1 mL
    Inactive Ingredients
    Ingredient NameStrength
    propylene glycol (UNII: 6DC9Q167V3)  
    #Item CodePackage DescriptionMarketing Start DateMarketing End Date
    1NDC:55529-011-011 in 1 CARTON
    150 mL in 1 VIAL, PLASTIC
    2NDC:55529-011-021 in 1 CARTON
    2100 mL in 1 VIAL, PLASTIC
    3NDC:55529-011-041 in 1 CARTON
    3250 mL in 1 VIAL, PLASTIC
    4NDC:55529-011-051 in 1 CARTON
    4500 mL in 1 VIAL, PLASTIC
    5NDC:55529-011-061 in 1 CARTON
    51000 mL in 1 VIAL, PLASTIC
    Marketing Information
    Marketing CategoryApplication Number or Monograph CitationMarketing Start DateMarketing End Date
    Labeler - Norbrook Laboratories Limited (214580029)
    NameAddressID/FEIBusiness Operations
    Armagh Road232880554MANUFACTURE, ANALYSIS
    NameAddressID/FEIBusiness Operations
    Carnbane Industrial Estate211218325MANUFACTURE
    NameAddressID/FEIBusiness Operations
    Zhejiang Hisun Pharmaceutical Co., Ltd654211754API MANUFACTURE
    NameAddressID/FEIBusiness Operations