Rycoben SC for Sheep

Special Precautions


Rycoben SC for Sheep, containing ricobendazole is an oral wormer for the treatment and control of major parasitic worms in sheep.

 It is also the only broad spectrum white drench licensed as an aid in the prevention of cobalt and selenium deficiency.


  • Benzimidazole group 1 white drench
  • Broad spectrum roundworm (stomach and gut worm) control
  • Ideal for spring/early summer Nematodirus control
  • Controls tapeworms (Moniezia) and lungworms
  • Kills adult liver fluke in chronic liver fluke disease
  • Unbeatable 3 day withholding period for increased marketing flexibility in lambs
  • Also licensed as an aid in the prevention of cobalt and selenium deficiency in sheep
  • Selenium deficiency can manifest as ‘White muscle disease’ causing ill thrift, infertility, weak or still born lambs and poor performance.
  • Cobalt deficiency can lead to appetite loss with inevitable effects on growth and performance

When to Use and Why?

A key use for Rycoben is as a targeted treatment for Nematodirus as part of an in-season wormer rotation.  Nematodirus usually affects lambs, where larval build-up on pasture can cause sudden death.

Nematodirus is unusual as larval stages rather than adults cause disease, meaning Faecal Egg Count Testing cannot predict disease outbreaks and more frequent dosing may be needed during risk periods.

Rycoben can also be used as a broad spectrum wormer through the main worming season.

Rycoben benefits from a short duration action within the treated animal.  This differs from some long acting preparations whose persistent activity can increase the rate of resistance development.

Rycoben can be used at a higher does to control adult liver fluke. It is recommended that Rycoben is only used as a flukicide in spring when only adult fluke are present on pasture.  In Autumn and Winter a flukicide with activity against early immature and immature fluke should be used.

To determine the best treatment programme for your farm consult your vet or advisor and SCOPS (Sustainable Control of Parasites in Sheep) guidelines.