The Sustainable Management of Parasites in Sheep (SCOPS) is urging farmers to take care when utilizing wormers and flukicides containing closantel, after it mentioned it acquired a small variety of reviews of overdosing.

Giving an animal an excessive amount of closantel may cause everlasting blindness, it mentioned, which has occurred on some sheep farms in current months.

Talking on behalf of SCOPS, impartial sheep advisor Lesley Stubbings, mentioned: “The protected use of animal medicines depends on all of the directions to be used being adopted as per the label – and we all know a key subject is guaranteeing animals obtain the proper dose. 

“As with all merchandise, animals have to be dosed with closantel in accordance with their weight.

“Due to the dangers posed by overdosing with closantel, SCOPS urges sheep farmers to separate a gaggle if the burden variation is giant, grouping sheep into weight bands and altering the dose charge accordingly.

“That’s safer than dosing to the heaviest animal and administering an excessive amount of closantel to small animals.”


SCOPS mentioned it encourages producers to report any “hostile response” to closantel in handled animals to the Veterinary Medicines Directorate.

Closantel is energetic within the following:

  • Supaverm;
  • Flukiver;
  • Solantel;
  • Closamectin;
  • Closiver.

The total record of merchandise that can be utilized to deal with inner parasites is on the SCOPS web site, and the group has highlighted the energetic for every.

“Closantel is a vital energetic within the management of inner parasites,” Stubbings mentioned.

“This isn’t a suggestion to keep away from the product – only a reminder of the dangers of not weighing animals and giving them an excessive amount of.”