Levamisole hydrochloride is a synthetic imidazothiazole anthelmintic used extra-label for the treatment and prevention of roundworms in poultry. The drug is also well known for its immunomodulatory effects, and is used as an adjutant treatment for colon cancer in humans. The mechanism of action of levamisole as an anthelmintic is related to its agnositic activity towards the L-subtype nicotinic acetylcholine receptors in the worm’s muscles. This agonistic action reduces the capacity of the male worms to control their reproductive muscles, thus limiting their ability to copulate. Levamisole is sold as a soluble drench powder which is added to the flock’s drinking water source. It’s effective against most adult species of roundworms, including Ascaridia galli, Heterakis gallinarum, and Capillaria obsignata. However, it does not have any effect on tapeworms.

Withdrawal period: There is a 16.4 day withdrawal period for laying hens producing eggs. This means that for 9 days after receiving this medication, the eggs produced by the hens should not be sold for human consumption. Storage/Stability: Levamisole products should be stored at room temperature (15-30°C), unless otherwise instructed by the manufacturer; avoid tem­peratures greater than 40°C.


Levamisole is a synthetic broad-spectrum anthelmintic, which is active against adult and larval stages of gastrointestinal nematodes and lungworms in cattle, sheep, pigs and poultry. Levamisole paralyses the worms, after which the worms are expelled in the faeces (within 24 hours after parenteral administration). A therapeutic dose of levamisole is non-toxic. The product may be given to pregnant animals and to animals in poor physical condition.

Features of Levamisole For Chickens:

Levasol 20% Oral is indicated for therapeutic treatment of lung and gastrointestinal worms in cattle, sheep, pigs and poultry.

  • Cattle, sheep : Cooperia, Dictyocaulus, Bunostomum, Chabertia, Nematodirus, Haemonchus, Ostertagia, Protostrongylus and Trichostrongylus spp.
  • Pigs : Hyostrongylus rubidus, Ascaris suum, Metastrongylus elongatus, Oesophagostomum spp. and Trichuris suis.
  • Poultry : Ascaridia and Capillaria spp.

Dosage And Administration:

For oral administration. Use of a drenching gun is recommended.

  • Cattle : 7.5 ml per 200 kg bodyweight once (equivalent to 7.5 mg levamisole per kg bodyweight).
  • Sheep : 0.75 ml per 20 kg bodyweight orally once (equivalent to 7.5 mg levamisole per kg bodyweight)

For oral administration via drinking water.


Age         –           Levasol 20% Oral per 1,000 litres of drinking water
1 week                    380 ml
2 weeks                   460 ml
3 weeks                   550 ml
4 weeks                   630 ml
5 weeks                   730 ml
6 weeks                   840 ml

This is equivalent to 30 mg levamisole per kg bodyweight.

Specification of Levamisole For Chickens

Shipping Weight0.1100kg
Shipping Width0.120m
Shipping Height0.120m
Shipping Length0.010m

Prices of Levamisole For Chickens

$24.75 – $34.50

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