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Ivermax Pour-On for Cattle (First Priority)

This page contains information on Ivermax Pour-On for Cattle (First Priority) for veterinary use.
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  • Ivermax Pour-On for Cattle (First Priority) Indications
  • Warnings and cautions for Ivermax Pour-On for Cattle (First Priority)
  • Direction and dosage information for Ivermax Pour-On for Cattle (First Priority)

Ivermax Pour-On for Cattle (First Priority)

This treatment applies to the following species:
Manufacturer: RXV


ANADA 200-318, Approved by FDA

Contains 5 mg ivermectin/mL


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


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

Ivermax Pour-On for Cattle (First Priority) Indications

IVERMAX Pour-On applied at the recommended dose level of 500 mcg/kg is indicated for the effective 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. Iineatum


Sarcoptes scabiei var. bovis


Linognathus vituli, Haematopinus eurysternus, Damalinia bovis, Solenopotes capillatus

Horn Flies

Haematobia irritans

Treatment Of Cattle For Horn Flies

IVERMAX Pour-On controls horn flies (Haematobia irritans) for up to 28 days after dosing. For best results IVERMAX Pour-On 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.

Persistent Activity

IVERMAX Pour-On has been proved to effectively control infections and to protect cattle from re-infection with Ostertagia ostertagi, Oesophagostomum radiatum, Haemonchus placei, Trichostrongylus axei, Cooperia punctata and Cooperia oncophora for 14 days after treatment.


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.


Squeeze-Measure-Pour System (250 mL or 1 Liter Bottle with 25 mL Measuring Cap) - Attach metering cap to the bottle.

Select the correct dose rate by rotating the adjuster cap in either direction to position the dose indicator to the appropriate dose.

Gently squeeze the bottle to fill to level (any excess will return to the bottle) and then tip and apply to animal along topline.

BackPack (84.5 fl oz/2.5 L Pack) - Connect the applicator gun to the backpack as follows: Attach the open end of the draw-off tubing to the dosing equipment. (Because of the solvents used in the formulation, only the Protector Drench Gun from Instrument Supplies Limited, or equivalent, is recommended. Other applicators may exhibit compatibility problems resulting in locking, incorrect dosage or leakage.)

Replace the shipping cap with the draw-off cap and tighten down.

Attach draw-off tubing to the draw-off cap.

Gently prime the applicator gun, checking for leaks.

Follow the manufacturer's directions for adjusting the dose.

When the interval between uses of the applicator gun is expected to exceed 12 hours, disconnect the gun and draw-off tubing from the product container and empty the product from the gun and tubing back into the product container. To prevent removal of special lubricants from the Protector Drench Gun, the gun and tubing must not be washed.

Mode Of Action

Ivermectin as a member of the avermectin family kills certain parasitic roundworms and ectoparasites, such as mites, lice, horn flies and other insects.

Its action is unique to the avermectin class of antiparasitic agents. This action involves a chemical that serves as a signal from one nerve cell to another, or from a nerve cell to a muscle cell. This chemical, a neurotransmitter, is called gamma-aminobutyric acid or GABA.

In roundworms, ivermectin stimulates the release of GABA from nerve endings and enhances binding of GABA to special receptors at nerve junctions, thus interrupting nerve impulses - thereby paralyzing and killing the parasite.

The enhancement of the GABA effect in arthropods such as mites, lice, and horn flies resembles that in roundworms except that nerve impulses are interrupted between the nerve ending and the muscle cell. Again, this leads to paralysis and death.

Ivermectin has no measurable effect against flukes or tapeworms, presumably because they do not have GABA as a nerve impulse transmitter.

The principal peripheral neurotransmitter in mammals, acetylcholine, is unaffected by ivermectin. Ivermectin does not readily penetrate the central nervous system of mammals where GABA functions as a neurotransmitter.


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.

RESIDUE INFORMATION: Cattle must not be treated within 48 days of slaughter for human consumption. 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.

Warning! Not For Use In Humans

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.

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




Store away from excessive heat (104°F/40°C) and protect from light.

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 IVERMAX (ivermectin) Pour-On 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 dermatoses or adherent materials, e.g. caked mud or manure.

Ivermectin has been associated with adverse reactions in sensitive dogs; therefore, IVERMAX Pour-On is not recommended for use in species other than cattle.

When To Treat Cattle With Grubs

IVERMAX Pour-On effectively controls all stages of cattle grubs. However, proper timing of treatment is important. For the most effective results, cattle should be treated as soon as possible after the end of the heel fly (warble fly) season. While this is not peculiar to ivermectin, destruction of Hypoderma larvae (cattle grubs) at the period when these grubs are in vital areas may cause undesirable host-parasite reactions. Killing Hypoderma lineatum when it is in the esophageal tissues may cause bloat: killing H. bovis when it is in the vertebral canal may cause staggering or paralysis. Cattle should be treated either before or after these stages of grub development.

Cattle treated with IVERMAX Pour-On at the end of the fly season may be re-treated with ivermectin during the winter without danger of grub-related reactions. For further information and advice on a planned parasite control program, consult your veterinarian.

Environmental Safety

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 cattle to enter lakes, streams or ponds for at least 6 hours after treatment. Do not contaminate water by direct application or by the 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.

Package Information

IVERMAX Pour-On is available in an 8.5 fl oz/250 mL and 33.8 oz/1 liter bottle with a measure-pour system, and an 84.5 fl oz/2.5 L backpack intended for use with appropriate automatic dosing equipment.

For technical assistance or to report adverse reactions, please call 1-800-338-3659.

IVERMAX is a trademark name of RXV Products®

Manufactured for RXV Products®, Westlake, TX 76262 USA

MAY 2004


8.5 fl oz (250 mL)

301496-03, 301497-04 410210

33.8 fl oz (1 Liter)

301498-03, 301499-03 410211

84.5 fl oz (2.5 Liter)

301500-03, 301501-03 410212

NAC No.: 10910701

822 7TH STREET, SUITE 605, GREELEY, CO, 80631
Telephone:   817-859-3000
Every effort has been made to ensure the accuracy of the Ivermax Pour-On for Cattle (First Priority) information published above. However, it remains the responsibility of the readers to familiarize themselves with the product information contained on the US product label or package insert.

Copyright © 2018 North American Compendiums. Updated: 2018-04-26