New Zealand

Cydectin Long Acting Injection for Sheep

Long acting control of internal parasites and for the treatment and control of nasal bot and itchmite of sheep

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  • CYDECTIN Long Acting Injection for Sheep contains moxidectin, a member of the milbemycin/avermectin family of chemicals. It is effective against sensitive strains of the following parasites:

    Gastrointestinal parasites (adult and immature L4):

    • Haemonchus contortus (barber’s pole worm)
    • Ostertagia (Teladorsagia) spp. (small brown stomach worm)
    • Ostertagia circumcincta
    • Ostertagia trifurcata
    • Trichostrongylus axei (stomach hair worm)
    • Trichostrongylus spp. (black scour worm)
    • Trichostrongylus colubriformis
    • Nematodirus spp. (thin necked intestinal worm)
    • Nematodirus filicollis
    • Nematodirus spathiger
    • Cooperia spp. (small intestinal worm)
    • Cooperia oncophora
    • Strongyloides papillosus (intestinal threadworm)
    • Oesophagostomum venulosum (large bowel worm)
    • Chabertia ovina (large mouthed bowel worm)
    • Trichuris ovis (adults only)
    • Inhibited (or hypobiotic) larvae of Haemonchus, Ostertagia and Trichostrongylus.

    Lungworm (adult and immature):

    • Dictyocaulus filaria

    Nasal bot

    • Oestrus ovis


    • Psorergates ovis


    A single treatment of CYDECTIN Long Acting Injection for Sheep at the recommended dose rate prevents reinfection of sheep as in the following table:


    H. contortus

    T. (O.) circumcincta

    T. colubriformis

    Prevents reinfection

    91 days

    112 days

    42 days


    The protection period may vary from the times stated. Where resistance exists, protection periods may be shorter than those stated. Some field studies have shown that a longer protection period may be achieved.

    CYDECTIN Long Acting Injection for Sheep is effective against nematodes with resistance to other anthelmintics (including benzamidazoles, levamisole and morantel).

    CYDECTIN Long Acting Injection for Sheep has also shown efficacy against a number of ivermectin resistant strains of H. contortus and Ostertagia spp. However, as moxidectin shares a similar mechanism of action to the avermectins, it should not be used where avermectin resistance is present, except where specially recommended by an advisor.

    • Long acting control of barber's pole worm, Ostertagia circumcincta, and Trichostrongylus colubriformis
    • Easy to use
    • Ideal for treating ewes prelambing
    • Less frequent drenching reduces the costs and risks associated with yarding, such as enzootic pneumonia
  • By law the user must take due care, obtaining expert advice when necessary, to avoid unnecessary pain and distress when using the product other than as directed on the label.

    SUBCUTANEOUS route only

    1mL per 20 kg liveweight, to give a dose of 1 mg moxidectin per kg

    Animals should be restrained for treatment. CYDECTIN Long Acting Injection for Sheep must be administered by subcutaneous injection (under the skin) at the base of the ear or high on the neck behind the ear.

    Ready to use solution for injection. Administer the dose according to the dosage table using the special CUDECTIN LA Sheep injector gun. Do not use any other injector. Check dose rates and equipment before treatment commences. Check accuracy of injectors regularly. A representative sample of animals should be weighed before treatment to ensure the correct dose rate is used. Dose the mob to the heaviest animal by liveweight in each group (ewes, wethers, rams, lambs etc). Do not underdose. Where there is a large variation in size within the group, the dose rate should be based on the label directions for each weight range. Drafting into two or more lines may be appropriate, to avoid excessive overdosing.

    Weight range (kg)

    Dose volume (mL)

    Doses per 500 mL Pack



























    Animals heavier than 90 kg to be dosed at 0.5 mL per 10 kg.

    CYDECTIN Long Acting Injection for Sheep has a wide margin of safety when used as recommended.

    CYDECTIN Long Acting Injection for Sheep is safe to use concurrently with other treatments, including mineral supplements and vaccines. It is recommended that vaccines are injected on the opposite side of the neck to CYDECTIN Long Acting Injection for Sheep.

    Not recommended for use in goats as safety and efficacy have not been evaluated.

  • AVOID SELF-INJECTION. Accidental self-injection may cause a persistent inflammatory or an allergic response. Medical advice should be sought as soon as possible on the management of all instances of self-injection, especially deep injections, those near a joint or those associated with bruising. The application of gentle pressure with absorbent material, e.g. facial tissues, to the needle puncture area will swab up unabsorbed product. Strong squeezing of the site should be avoided. The damaged area should be thoroughly cleansed and a suitable antiseptic applied.


    It is an offence for users of this product to cause residues exceeding the relevant MRL in the NZ (Maximum Residues Limits of Agricultural Compounds) Food Standards.

    Meat: Sheep producing meat and/or offal for human consumption must not be sold for slaughter either during treatment or within 91 days of the last treatment.

    Milk: Milk intended for sale for human consumption must be discarded during treatment and for not less than 180 days after treatment.

    Registered pursuant to the ACVM Act 1997, No. A9926. See for registration conditions

    Approved pursuant to the HSNO Act 1996, Approval Code HSR007722. See for approval conditions