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The withdrawal period for beef cattle treated with Closamectin pour-on has increased from 28 to 58 days, according to the product's licence documents updated by Ireland's Health Products Regulatory Authority on Friday.
The product is routinely used to treat cattle infested by fluke, roundworms, lungworms, eyeworms, warbles, mites and lice.
Closamectin combines ivermectin and cosantel active ingredients and is made by Newry, Co Down-based Norbrook Laboratories.
It remains banned in cows producing milk for human consumption including during the dry period, and in dairy heifers during the second half of pregnancy.
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