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Ivermectin is effective against a wide range of parasites, including small and large strongyles, pinworms, botflies as well as external parasites, such as mites or lice. This medication is available in both a paste and liquid format. Incorporating ivermectin as part of a comprehensive parasite control program enables horse owners to protect their horses from parasitic infestations. However, some parasites are developing resistance to ivermectin and other deworming agents due to the improper use of these products.
Consult with your veterinarian prior to administering ivermectin paste or liquid to your horse. Your veterinarian will help you determine the proper dosage regimen and provide guidance for an effective deworming strategy.
Ivermectin Paste Dewormer
Ivermectin belongs to a chemical class of macrocyclic lactones called avermectins. Avermectins are fermentation by-products derived from soil-dwelling Streptomyces bacteria.
These compounds have broad-spectrum antiparasitic properties against nematodes and arthropods. Their unique mechanism of action targets parasites effectively yet has minimal impact on the cells of mammals.
Ivermectin is available in a variety of commercial formulations and combination products, most commonly as an oral paste. While this medication was initially introduced as an intramuscular injection, this form was discontinued due to adverse reactions.
In North America, ivermectin is usually available in a prefilled syringe or tube at a 1.87% concentration, or as a 1% liquid drench.
The recommended dose is 200 µg/kg or 0.2 mg/kg of the horse’s body weight. Ask your veterinarian for help with estimating your horse’s weight to ensure you provide the correct dosage of this drug.