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LONGRANGE is the first extended-release injection that delivers 100 to 150 days of parasite control in a single dose, thanks to its unique THERAPHASE Technology.
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Item# Size/Desc Qty Price
50 ml bottle
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Item qualifies for FREE SHIPPINGThis item requires a RX
250 ml bottle
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500 ml bottle
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Item qualifies for FREE SHIPPINGThis item requires a RX

**Note: This product requires a veterinarian's prescription to purchase.At checkout you will need to provide your veterinarian's FAX or email address. We will then send him or her a prescription verification that he or she will need to sign and return before we can ship you this product.


LONGRANGE[ eprinomectin ]should be given only by subcutaneous injection in front of the shoulder at the recommended dosage level of 1 mg eprinomectin per kg body weight 1 mL per 110 lb body weight.
Each mL of LONGRANGE contains 50 mg of eprinomectin, sufficient to treat 110 lb 50 kg body weight.

Body Weight [lb]             Dose Volume [mL]

110                                      1
220                                      2
330                                      3
440                                      4
550                                      5
660                                      6
770                                      7
880                                      8
990                                      9
1100                                    10

Divide doses greater than 10 mL between two injection sites to reduce occasional discomfort or site reaction. LONGRANGE is to be given subcutaneously only. 
Animals should be appropriately restrained to achieve the proper route of administration. Inject under the loose skin in front of the shoulder see illustration using a 16 or 18 gauge, 1/2 to 3/4 inch needle.
Sanitize the injection site by applying a suitable disinfectant.
Clean, properly disinfected needles should be used to reduce the potential for injection site infections.

50 mL bottle size: Use only polypropylene syringes. Not for use with polycarbonate syringe material. If syringe material is not known, contact the syringe manufacturer prior to use for identification. Do not use beyond 3 months after stopper has been punctured. Discard bottle after 15 stopper punctures.

250 mL and 500 mL bottle sizes: Use only automatic syringe equipment provided by Merial. To obtain compatible equipment, contact Merial at 1-888-637-4251 or your veterinarian. LONGRANGE should not be stored in automatic syringe equipment. Automatic syringe equipment should be thoroughly cleaned after each use. Discard bottle after one stopper puncture with draw-off spike. No special handling or protective clothing is necessary.


Withdrawal Periods and Residue Warnings Animals intended for human consumption must not be slaughtered within 48 days of the last treatment.
This drug product is not approved for use in female dairy cattle 20 months of age or older, including dry dairy cows.
Use in these cattle may cause drug residues in milk and/or in calves born to these cows.
A withdrawal period has not been established for pre-ruminating calves.
Do not use in calves to be processed for veal.

User Safety Warnings:

Not for Use in Humans. 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, to obtain an MSDS, or for assistance, contact Merial at 1-888-637-4251. For additional information about adverse drug experience reporting for animal drugs, contact FDA at 1-888-FDAVETS, or http://www.fda.gov/AnimalVeterinary.

Animal Safety Warnings and Precautions:

The product is likely to cause tissue damage at the site of injection, including possible granulomas and necrosis. These reactions have disappeared without treatment. Local tissue reaction may result in trim loss of edible tissue at slaughter. Observe cattle for injection site reactions. If injection site reactions are suspected, consult your veterinarian. This product is not for intravenous or intramuscular use. Protect product from light. LONGRANGE has been developed specifically for use in cattle only. This product should not be used in other animal species.

When to Treat Cattle with Grubs:

LONGRANGE 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. 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 salivation and bloat killing H. bovis when it is in the vertebral canal may cause staggering or paralysis. These reactions are not specific to treatment with LONGRANGE, 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.

Environmental Hazards:

Studies indicate that when eprinomectin comes in contact with soil, it readily and tightly binds to the soil and becomes inactive over time. Free eprinomectin may adversely affect fish and certain aquatic organisms. 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, eprinomectin 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. Not for use in cattle managed in feedlots or under intensive rotational grazing because the environmental impact has not been evaluated for these scenarios.

Other Warnings:

Underdosing and/or subtherapeutic concentrations of extended-release anthelmintic products may encourage the development of parasite resistance. It is recommended that parasite resistance be monitored following the use of any anthelmintic with the use of a fecal egg count reduction test program.


Store at 77° F 25° C with excursions between 59° and 86° F 15° and 30° C. Protect from light. NADA #141-327, Approved by FDA Made in Canada. Manufactured for Merial Limited, Duluth, GA, USA. The Cattle Head Logo is a registered trademark, and &tradeLONGRANGE is a trademark, of Merial. 2012 Merial. All rights reserved.