Flubenvet - protect your birds and your pocket

About Flubenvet

For over 20 years Flubenvet™ 5% Premix has been added to poultry feed to provide broad-spectrum worm control for game birds and layers.


Flubenvet remains the only dewormer licensed for the control of ALL the life stages of ALL the main species of parasitic worms1. This is critical for effective control because worm eggs far outnumber adults and can survive in the environment for months or, in some instances, over a year. This means viable eggs can still be present in the ground between seasons. Worm eggs are also able to resist destruction by many commonly used farm disinfectants. Therefore, it is important to ensure that laying and rearing pens are set up on clean ground and equipment is disinfected before use, to minimise the initial risk of exposure to high adult worm burdens in the area. Then, as soon as you bring in laying stock, providing medicated feed that includes Flubenvet will eliminate all life stages of the major worm species1.


Studies have found that all estates across the country are infected with worms, with young birds being particularly susceptible2. Gapeworms (Syngamus trachea) are arguably the most important species of worms that infect game birds as it is a major cause of death and respiratory infections in both pheasants and partridges. Gapeworms have a rapid lifecycle, once the birds ingest an infective egg, larva or earthworms containing larvae:


  • In just 4-6 hours larvae can be found in the lungs after having burrowed through the gut wall into the blood stream, potentially causing lung damage
  • 7 days later they can be found in the windpipe and have developed into adults, causing the bird to ‘gape’ or ‘snick’

Gapeworm Lifecycle


For this reason gapeworm infection needs to be tightly controlled, with 3 weekly Flubenvet treatment advised to control their short lifecycle. Flubenvet’s active ingredient, flubendazole, simultaneously enters the worm through the mouth and skin or cuticle. It acts by binding to tubulin, the dimeric sub-unit protein of the microtubules. Flubendazole inhibits microtubular assembly in absorptive cells and causes an irreversible lytic degeneration of the cell, killing the parasite. Larval growth in developing worm eggs is also inhibited. Immature, fast-developing worms are particularly sensitive to flubendazole’s mode of action. Uniquely, Flubenvet is active against worm larvae and eggs. This means that immature worms are killed straight away, as well as any worm eggs that may be picked up preventing early damage, rather than being allowed to progress to adulthood, causing further damage as they progress through the mature stages.

Flubenvet’s performance spectrum vs available alternatives

Flubenvet’s performance spectrum vs available alternatives


Elanco understand that it is important to maximise your birds’ potential whilst balancing financial returns. Rising feed prices are hitting the pockets of game farmers and keepers everywhere, but here’s some good news. To help sustain your business we’re offering Flubenvet, the industry’s leading dewormer3, at a more cost effective price. This means that when it comes to cost savings you won’t have to compromise the health, welfare and productivity of your birds.


Contact your feed mill today to find out how your business can profit from this cost effective offering.

*/1 Flubenvet 5% SPC.

2 Draycott, RA, Parish, DM, Woodburn, MI & Carroll, JP. Spring survey of the parasite Heterakis gallinarum in wild-living pheasants in Britain. Veterinary Record 2000; 147: 245–246.

3 Elanco Market Research Flubenvet Lifecycle Study UK 2021.

Flubenvet 5% w/w Premix for Medicated Feeding Stuff contains 50 mg/g flubendazole. Legal Category: POM-VPS. Birds must not be slaughtered for human consumption during treatment. Chickens, turkeys, geese, partridges and pheasants. Withdrawal period: Meat: 7 days Chickens eggs: zero days. To be supplied only on prescription. Advice on the use of Flubenvet or alternative medicines must be sought from the medicine prescriber. Other product names are trademarks of their respective owners. For further information call Elanco Animal Health on +44(0)1256 353131, or email elancouk@elanco.com, or write to: Elanco UK AH limited, Form 2, Bartley Way, Bartley Wood Business Park, Hook RG27 9XA. Use medicines responsibly www.noah.co.uk/responsible.

Flubenvet, Elanco and the diagonal bar logo are trademarks of Elanco or its affiliates. © 2022 Elanco or its affiliates. PM-UK-22-0111