IVERMECTIN POUR-ON For Cattle: Product Information

IVERMECTIN POUR-ON FOR CATTLE- ivermectin solution

PARASITICIDE Kills: Roundworms (including Brown Stomach Worm), Lungworms, Grubs, Sucking Lice, Biting Lice, Mange Mites, Horn Flies


Approved by FDA under ANADA # 200-340
Restricted Drug (California) — Use Only as Directed

For Animal Use Only • Keep Out of Reach of Children


See attached booklet for complete indications and use directions.


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


Ivermectin Pour-On for Cattle (ivermectin topical solution) delivers internal and external parasite control in one convenient low-volume application. Ivermectin Pour-On for Cattle contains ivermectin, a unique chemical entity.


Ivermectin is a member of the macrocylic 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.


Ivermectin Pour-On for Cattle applied at the recommended dose level of 500 mcg/kg is indicated for the effective treatment and control of these parasites.

Gastrointestinal Roundworms
Ostertagia ostertagi (including inhibited stage) (adults and L4 )
Haemonchus placei (adults and L4 )
Trichostrongylus axei (adults and L4 )
T. colubriformis (adults and L4 )
Cooperia oncophora (adults and L4 )
Cooperia punctata (adults and L4 )
Cooperia surnabada (adults and L4 )
Strongyloides papillosus (adults)
Oesophagostomum radiatum (adults and L4 )
Trichuris spp. (adults)
Dictyocaulus viviparus (adults and L4 )
Cattle Grubs (parasitic stages)
Hypoderma bovis
H. lineatum
Sarcoptes scabiei var. Bovis
Linognathus vituli
Haematopinus eurystemus
Damalinia bovis
Solenopotes capillatus
Horn Flies
Haematobia irritans
Ivermectin Pour-On for Cattle has been proved to effectively control infections and to protect cattle from re-infection with: Oesophagostomum radiatum and Dictyocaulus viviparous for 28 days after treatment; Cooperia punctata and Trichostrongylus axei for 21 days after treatment; Ostertagia ostertagi , Haemonchus placei , Cooperia oncophora and Cooperia surnabada for 14 days after treatment; Damalinia bovis for 56 days after treatment.
Ivermectin Pour-On for Cattle controls horn flies (Haematobia irritans) for up to 28 days after dosing. For best results Ivermectin Pour-On for Cattle should be part of a parasite control program for both internal and external parasites based on the epidemiology of these parasites. Consult your veterinarian or an entomologist for the most effective timing of applications.


The dose rate is 1 mL for each 22 lb of body weight. The formulation should be applied along the topline in a narrow strip extending from the withers to the tailhead.
For the 250 mL and 1 Liter containers, see the diagram on the last page of this insert. Each 5 mL will treat 110 lbs body weight. When body weight requires a drug product volume that is between the measuring markings, use the next higher increment.
Applicator Gun
(2.5 L, 5 L and 5 gallon bottles)
Because of the solvents used in Ivermectin Pour-On for Cattle, an applicator gun is recommended.Follow the applicator gun manufacturer’s directions for priming the gun, adjusting the dose, and care of the applicator gun following use.

Weight Dose
220 lb (100 kg) 10 mL
330 lb (150kg) 15 mL
440 lb (200 kg) 20 mL
550 lb (250 kg) 25 mL
660 lb (300 kg) 30 mL
770 lb (350 kg) 35 mL
880 lb (400 kg) 40 mL
990 lb (450 kg) 45 mL
1100 lb (500 kg) 50 mL

Do not underdose. Ensure each animal receives a complete dose based on a current body weight. Underdosing may result in ineffective treatment, and encourage the development of parasite resistance.


Studies conducted in the U.S.A. have demonstrated the safety margin for ivermectin. Based on plasma levels, the topically applied formulation is expected to be at least as well tolerated by breeding animals as is the subcutaneous formulation which had no effect on breeding performance.


Keep this and all drugs out of reach of children.

The Safety Data Sheet (SDS) contains more detailed occupational safety information. To report adverse effects, obtain an SDS or for assistance, contact First Priority, Inc. at 1-800-650-4899.


This product should not be applied to self or others because it may be irritating to human skin and eyes and absorbed through the skin. To minimize accidental skin contact, the user should wear a long-sleeved shirt and rubber gloves. If accidental skin contact occurs, wash immediately with soap and water. If accidental eye exposure occurs, flush eyes immediately with water and seek medical attention.

image of residue warning


• Parasite resistance may develop to any dewormer, and has been reported for most classes of dewormers.
• Treatment with a dewormer used in conjunction with parasite management practices appropriate to the geographic area and the animal(s) to be treated may slow the development of parasite resistance.
• Fecal examinations or other diagnostic tests and parasite management history should be used to determine if the product is appropriate for the herd/flock, prior to the use of any dewormer. Following the use of any dewormer, effectiveness of treatment should be monitored (for example, with the use of a fecal egg count reduction test or another appropriate method).
• A decrease in a drug’s effectiveness over time as calculated by fecal egg count reductions tests may indicate the development of resistance to the dewormer administered. Your parasite management plan should be adjusted accordingly based on regular monitoring.


Store at or below 25ºC (77ºF) and protect from light. Excursions permitted to 104ºF (40ºC).
• Use only in well-ventilated areas or outdoors.
• Close container tightly when not in use.
• Cattle should not be treated when hair or hide is wet since reduced efficacy may be experienced.
• Do not use when rain is expected to wet cattle within six hours after treatment.
• This product is for application to skin surface only. Do not give orally or parenterally.
• Cloudiness in the formulation may occur when Ivermectin Pour-On for Cattle is stored at temperatures below 32°F. Allowing to warm at room temperature will restore the normal appearance without affecting efficacy.
• Antiparasitic activity of ivermectin will be impaired if the formulation is applied to areas of the skin with mange scabs or lesions, or with dermatosis or adherent materials, e.g., caked mud or manure.
• Ivermectin has been associated with adverse reactions in sensitive dogs; therefore, Ivermectin Pour-On for Cattle is not recommended for use in species other than cattle.
• Restricted Drug (California) — Use only as directed.

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