Alstomec Pour-on Solution 0.5% at the recommended dose rate of 500 micrograms ivermectin per kg bodyweight is used for the treatment of the following species of gastrointestinal roundworms, lungworms, warbles, mites and lice in cattle. Gastrointestinal roundworms (adults and fourth stage larvae): Ostertagia ostertagi (including inhibited O ostertagi), Haemonchus placei, Trichostrongylus axei, Trichostrongylus colubriformis, Cooperia spp, Oesophagostomum radiatum, Strongyloides papillosus (adult), Trichuris spp (adult). Lungworms (adult and fourth stage larvae): Dictyocaulus viviparus. Eye worms (adult): Thelazia spp. Warbles (parasitic stages): Hypoderma bovis, Hypoderma lineatum. Mites: Chorioptes bovis (reduction of infestation), Sarcoptes scabiei var bovis. Sucking lice: Linognathus vituli, Haematopinus eurysternus. Biting Lice: Damalinia bovis.

The product given at the recommended dose rate of 500 micrograms/kg bodyweight has persistent activity against Trichostrongylus axei and Cooperia spp. acquired during the 14 days after treatment, only if the whole herd is treated simultaneously; Ostertagia ostertagi and Oesophagostomum radiatum acquired during the first 21 days after treatment; Dictyocaulus viviparus acquired during the first 28 days after treatment. It also has a persistent activity against horn flies (Haematobia irritans) for 28 days after treatment, partial efficacy may last for up to 35 days post application. Occasionally variable activity may be observed against Haemonchus placei (L4), Cooperia spp, Trichostrongylus axei and Trichostrongylus colubriformis.