Gut Worm | Albendazole Bolus
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Gut Worm | Albendazole Bolus


Albendazole Bolus- Albendazole is a synthetic anthelmintic medication widely used in veterinary medicine for the prevention and treatment of worm infections in livestock. It belongs to the group of benzimidazole-derivatives and exhibits a broad spectrum of activity against a variety of worms. Additionally, at higher dosage levels, it can effectively target adult stages of the liver fluke.

Albendazole is primarily utilized for the prophylaxis and treatment of worm infections in cattle, calves, sheep, and goats. The medication demonstrates efficacy against various gastrointestinal worms, including Bunostomum, Cooperia, Chabertia, Haemonchus, Nematodirus, Oesophagostomum, Ostertagia, Strongyloides, and Trichostrongylus spp. Lung worms, specifically Dictyocaulus viviparus and D. filaria, can also be effectively controlled with Albendazole. Moreover, the medication is capable of targeting tapeworms of the Monieza spp. and adult Fasciola hepatica, a type of liver fluke.

How to use Albendazole Bolus

  • Administer 1 Albendazole Bolus per 70 kilograms of the cow’s body weight.
  • Give the bolus orally to the cow. Ensure that the cow’s head is properly restrained during administration. One person may need to hold onto the cow while another person gives the bolus.
  • Place the cow in a restraining or squeeze chute with a head gate to ensure proper restraint.
  • Carefully insert the bolus into the cow’s mouth and throat. Be cautious not to force the bolus too hard or too far back towards the pharynx to avoid damaging soft tissues.
  • Remember that Albendazole Bolus is banned for use in dairy cows during lactation.


Contraindications of Albendazole Bolus

It is important to note that administering Albendazole during the first 45 days of gestation is contraindicated. The medication should be avoided during this period to ensure the safety of the animal and its offspring.

Side Effects of Albendazole Bolus

While rare, hypersensitivity reactions can occur as a side effect of Albendazole administration. It is essential to monitor animals closely for any signs of adverse reactions and seek veterinary assistance if necessary.

Dosage for Albendazole Bolus

For oral administration, the recommended dosage of Albendazole varies depending on the species and weight of the animal. Calves and cattle should be given **1 bolus per 60 kg body weight**. In cases of liver fluke infection in cattle, the recommended dosage is **1 bolus per 35 kg body weight**. Similarly, sheep and goats should be administered **1 bolus per 35 kg body weight**, and **1 bolus per 30 kg body weight** for liver fluke infections.

Withdrawal Times

To ensure the safety of meat and milk consumption, appropriate withdrawal times should be observed. It is advised to wait 12 days after treatment before using the animal’s meat and 4 days before consuming its milk.


Here are some  precautions for using Albendazole Bolus for cows:

  • Let your veterinarian know if your cow is allergic to Albendazole or similar drugs.
  • Inform your veterinarian about any liver, bile duct, or blood/bone marrow problems your cow may have had in the past.
  • Do not use Albendazole Bolus in pregnant cows, as it can harm the developing calf.
  • Do not use Albendazole Bolus in dairy cows that are currently producing milk.
  • Albendazole may interact with certain medications, so be cautious if your cow is taking other drugs. Consult your veterinarian for guidance.
  • Although rare, Albendazole may cause some side effects in cows. If you notice anything unusual, contact your veterinarian.