Ivermectin – For Worms, Lice & Mites

Ivermectin is an anti-parasite medication, effective against most worms (not tapeworm), mites and some lice including scaly leg mite and northern fowl mite. Ivermectin pour-on / drops is applied to the skin.

HarkamectinIvermectin Drops are usually sold under the Small Animal Exemption Scheme for use in rabbits, Guinea Pigs and ornamental birds. Products licensed under the Small Animal Exemption Scheme are not licensed for use in food-producing animals such as chickens and it is for that reason that there is no information relating to the withdrawal period for eggs or meat following use of Ivermectin Drops on poultry.

Where there is a licensed alternative, vets will prescribe the licensed product. To treat worms – Flubenvet is the (only) licensed in feed product.

In the absence of licensed alternatives, veterinarians do sometimes prescribe this product for poultry under their own clinical judgement to treat lice in poultry.

It is however only a veterinarian who can advise on such use and it would breach of the veterinary medicines regulations and NOAH code of practice by supporting, or encouraging the use of this product on a non-target species.


Buy IvermectinI strongly recommend that you seek the advice of your vet before purchasing Ivermectin for use on chickens or other poultry.

Avermectins are more toxic to waterfowl than chickens so this is particularly important if you are treating ducks or geese!

You can buy Ivermectin here.

Uses: Sometimes prescribed by Vets to treat endoparasites (worms) and ectoparasites (lice and most mites including scaly leg mite). Remember red mite live in the house, so housing will require alternative treatment.
Formats available: Injectable, oral or drops for skin. Pour on drops are usually prescribed.
Dosage: For the treatment of an existing infestation, repeat doses are required often weekly three times.
Egg Withdrawal period: As advised by Vet, depends on the strength of solution. Vets prescribing Ivomec Eprinex usually advise 7 days.
Slaughtering for meat for human consumption: As advised by Vet, depends on the strength of solution. Vets Prescribing Ivomec Eprinex usually advise 28 days.
Category: POM-VPS
Storage: In original packing below 25ºC and out of reach of children.

Sold in UK as Ivomec, Xeno 200, Noromectin, Harka Mectin, Heartgard30 and Acarexx.

Wear gloves and wash hands thoroughly with soap and water following treatment.

The information given here is the opinion of the authors and should not be considered as professional advice. Where there is conflicting information, you should always follow the advice of your vet.

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Tim Daniels

Tim is the founder of the poultrykeeper website and lives in Herefordshire, UK. He keeps Cream Legbar chickens, Silver Sebright bantams and hybrid layers for eggs, Abacot Ranger ducks, Brecon Buff geese and some quail.

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