Brand: FLUBENVET ® 1% Medicated Premixture

Company: ELANCO

DELIVERY FORM: «feed additives and medicated feeds» for oral administration.

ACTIVE INGREDIENT(S): flubendazole 10 mg/g (equivalent to 1%)

CHEMICAL CLASS of the active ingredient(s): benzimidazole


PARASITES CONTROLLED (spectrum of activity)*

  • Mature and immature stages and eggs of the following nematodes of chickens, turkeys, geese: Ascaridia galli (large roundworm), Heterakis gallinarum (caecal worm), Capillaria spp (hair worm), Amidostomum anseris (gizzard worm), Syngamus trachea (gapeworm).

* Country-specific differences may apply: read the product label.


  • Chickens and geese: 60 g of product (the whole tub) medicates 20 kg of feed. Treat for 7 consecutive days.
  • Turkeys: 60 g of product (the whole tub) medicates 30 kg of feed. Treat for 7 consecutive days.
  • The daily ration should be fed as a “complete ration” during the 7 day treatment period - i.e. only feed birds with feed which has been medicated with Flubenvet. At the inclusion rates for chicken and geese the ration will contain 30 ppm (=mg/kg) flubendazole and for turkeys 20 ppm (=mg/(kg).

Read the product label for additional use recommendations.

* Country-specific differences may apply: read the product label.


  • LD50 (acute oral) in rats: >5000 mg/kg (for the a.i.)
  • LD50 (acute dermal) in rats: n.a.

Suspected poisoning? Read the article on flubendazole safety in this site.

Withholding periods (=withdrawal times) in days for meat & eggs (country-specific differences may apply: read the product label)

  • Meat: 7 days
  • Eggs: NIL.

WARNING !!!: Never use on humans, dogs or cats

You may be interested in the following articles in this site dealing with the general safety of veterinary products:


There are no reports on resistance of poultry roundworms to benzimidazoles more than 40 years after their introduction for this use.

This means that if this product does not achieve the expected efficacy against the mentioned parasites, it is most likely that it is not due to resistance but to incorrect use, which is the most frequent cause of product failure.

However, to prevent or at least delay resistance development it is a good practice to periodically alternate anthelmintics (rotation) with different modes of action.

Alternative chemical classes/active ingredients to prevent resistance of gastrointestinal roundworms through product rotation in poultry:

These alternative products may not be available in all countries or may not be effective against all the concerned parasites.

It is highly recommended to periodically check the resistance status of each property performing appropriate tests (e.g. fecal egg counts) under supervision of a veterinary doctor.

Learn more about resistance and how it develops.


Are the active ingredients of this product ORIGINAL* or GENERICS**?


*Meaning that they are still patent protected and generics are not yet available
**Meaning that they have lost patent protection and may be acquired from manufacturers of generic active ingredients other than the holder of the original patent.

COUNTRIES where this brand/product is marketed: UK and other EU countries
GENERIC BRANDS available? Yes, in some countries, but not too many.

Click here to learn more about GENERIC vs. ORIGINAL drugs.

Click here for an overview on the most used antiparasitic feed additives and medicated feeds for livestock and horses.


FLUBENVET 1% Medicated Premixture is a classic anthelmintic for poultry from ELANCO containing generic flubendazole.

Flubendazole is a veteran anthelmintic introduced in the 1970s (by JANSSEN). It has a broad-spectrum of activity against roundworms (gastrointestinal and pulmonary) but is ineffective against tapeworms and flukesFlubendazole also kills eggs of roundworms (ovicidal activity). As all benzimidazoles, flubendazole has no efficacy whatsoever against external parasites (ticksflies, lice, mites, etc). Among the benzimidazoles flubendazole is quite comparable with mebendazole in terms of efficacy and safety. Flubendazole is moderately used in pig & poultry but rather scarcely in ruminants, horses or pets. It is not used in agriculture.

As all benzimidazoles (as well as other anthelmintics such as levamisole and tetrahydropyrimidines), flubendazole has no residual effect, i.e. it kills the parasites shortly after administration, but as soon as medicated feeding is interrupted it does not significantly protect the animals against re-infestation by infective stages in their environment.


This article IS NOT A PRODUCT LABEL. It offers complementary information that may be useful to veterinary professionals and users that are not familiar with veterinary antiparasitics. 

Information offered in this article has been extracted from publications issued by manufacturers, government agencies (e.g. EMEA, FDA, USDA, etc.) or in the scientific literature. No guarantee is given on its accuracy, integrity, sufficiency, actuality and opportunity, and any liability is denied. Read the site's DISCLAIMER.

In case of doubt contact the manufacturer or a veterinary professional.