Pfizer Solitude IGR

Regularly: $108.99
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6 lb
Less than $0.43/DAY
(192 day supply)


In Stock. Usually Ships within 24 hours.

20 lb
Less than $0.34/DAY
(640 day supply)


In Stock. Usually Ships within 24 hours.

Shipping weight = 7.00 lbs.


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Product Summary:

Pfizer Solitude IGR™
by Zoetis, formerly Pfizer
For feed-through fly prevention and control of house and stable flies in and around horses, horse barns, stables, paddocks and race tracks. When mixed 1/2 oz. into a horse's ration daily according to the directions, will prevent house and stable fly development. Solitude IGR™  (cyromazine) is a non-organophosphate that has been safely used in horses since 2001 and undergone extensive research to prove its effectiveness and safety.
  • Repeated studies show up to 100% efficacy in inhibiting larvae development
  • Studies have proven it is 99.5% effective against stable flies and 100% effective against house flies with no effect on horses, other mammals or beneficial insects
  • Significant results may be observed within two weeks but the full benefit should be realized within 4-6 weeks of administration as the adult populations die off. Solitude IGR™ is intended for use only in equidae including horses, mules and donkeys.
  • Cyromazine, the active ingredient in Solitude IGR™, is an insect growth regulator that works on the fly's chitin exoskeleton and is very species specific to house and stable flies. As the horse is fed cyromazine, it passes through the horse and is excreted in the manure. House flies and stable flies lay their eggs in the manure and the eggs subsequently hatch into the larval or maggot stage. (Cyromazine has no effect on the chitin of the adult fly.) As the maturing maggots feed on the manure treated with cyromazine, they become unable to successfully develop into adult flies because cyromazine inhibits the proper formation of chitin. The immature stage of the fly dies. Cyromazine has a well documented safety and efficacy profile. It has been extensively evaluated in horses since 2001 as well as intensely studied in other species for more than 20 years. Numerous environmental studies have documented cyromazine's safety for mammals including humans and horses, as well as birds, daphnia, minnows and other indicator species.
  • Once excreted, Solitude IGR™ breaks down to a melamine monomer, a slow release nitrogen fertilizer
  • Greatly reduces the use of neurotoxic pesticide sprays and overhead fly systems creating a healthier environment for horses, staff, and riders
Item Specifications:

Start feeding Solitude IGR™ early in the spring before flies begin to appear and continue feeding throughout the summer and into the fall until cold weather inhibits fly development. In some cases, supplemental fly control measures may be needed in and around paddocks and stables to control adult house flies and stable flies, which can breed not only in manure, but in other decaying vegetable matter or silage on premises. Solitude IGR™ will provide a high degree of fly control and will give the best results when integrated with a well-managed fly control program which includes appropriate sanitary and management practices to reduce the number and size of fly breeding sites.
To maximize the effectiveness of Solitude IGR™, horses must be fed individually. This product is to be fed top-dressed on grain or mixed with the horse's total ration to provide 300mg (one scoop) of cyromazine per horse per day.
Daily dosage: Using 1/2 oz. scoop supplied with the product, mix one scoop of Solitude IGR™ in the horse's ration every day.
Do Not Contaminate Water, Food or Feed by Storage and Disposal.
Wastes resulting from the use of this product may be disposed of on site or at an approved waste disposal facility.
Harmful if inhaled or absorbed through the skin. Avoid breathing dust and contact with skin or clothing. May cause skin sensitization reactions in certain individuals. Wash thoroughly with soap and water after handling. Do not apply directly to water.
Downloadable Resources
MSDS SheetManufacturer Information

Product Reviews by Customers

Browse 6 questions and 38 answers
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Why did you choose this? Store
been using this for many years now. Wouldn't want to be without it.
Leslie N on Sep 25, 2016
Excellent product for fly control.
Kathleen M on Aug 29, 2016
Used before only feed-through that still works AT ALL.
Frank S on Sep 23, 2016
recommended by my vet. She felt it was the safest feed through.
STEPHANIE M on Jun 8, 2016
does this effect using manure in compost in your garden?
janet l on Mar 31, 2015
Best Answer: Solitude IGRâ„¢ breaks down to a melamine monomer, a slow release nitrogen fertilizer. Please check if this is acceptable for garden compost with your County Extension Agent and your veterinarian.
Reply · Report · Maria PStaff on Apr 1, 2015
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My small yorkies often eat horse chips while I'm cleaning stalls. Will this product be detrimental to their health?
A shopper on Aug 30, 2015
Best Answer: I don't know, but I can tell you, that I used this product for 2 years ( switched to fly predators this year) and my dogs ate the "chips" all the time with seemingly no ill effects- I think it worked in their poop too . But, they are much bigger then a yorkie, so he might be a little more delicate. I can't recall their being a warning on the label either. I hope that helps. If I were you- being has he is such a little dog,- I would call the vet and see what they say. It was a very effective product, and I decided to go with the more expensive Solitude, rather then the other ones on the market because i got the impression, after doing a lot of internet "researching", it was safer for the horses and the dogs. HtH
Reply · Report · CHRISTINE E on Sep 1, 2015
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Is this product harmful to dogs or other animals who might ingest the treated manure?
Terry H on Aug 10, 2015
Best Answer: I have 4 horses and over the years have had 5 dogs at one time. I have been feeding Solitude IGR for 4 years. My dogs have the run of the farm and I have never had a problem from the dogs ingesting the treated manure.
Reply · Report · KATHY A on Aug 10, 2015
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What shots do I need to give my donkey?
A shopper on Apr 3, 2015
Best Answer: It depends on many factors. Please contact your local veterinarian.
Reply · Report · LYNLEE N on Apr 3, 2015
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what is the largest container available?. I used to be able to get a bigger container.
Kathy B on Mar 10, 2016
Best Answer: The largest container available through us is the 20 pound.
Reply · Report · Alexis KStaff on Mar 11, 2016
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