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Zermex w/c 0.5% Pour-On for Beef and Dairy Cattle


All grazing cattle are exposed to gut worms and consequently can suffer production losses; younger cattle are most at risk of disease until they acquire immunity. 



There are many products available to help with the control of parasites; getting the most from their active ingredients is key in ensuring ideal livestock performance and reducing risk of resistance. When choosing products for your farm’s needs it is important to make an informed choice. Incorporating a rotating 

regimen of active ingredients in your health plan will help to minimise the risk of anthelmintic resistance. This should be discussed with your animal health adviser. 



A treatment at turnout and a midseason repeat treatment will cover your cattle until housing. 

Longest Pour-On Dosing Interval 

ZERMEX® 0.5% w/v Pour-On has the longest dosing interval of 8 to 10 weeks2. The extended periods between worming result in lower labour costs, reduced stress on cattle and can lead to improved growth.

Highest Potency 

ZERMEX® 0.5% w/v Pour-On contains moxidectin, the most potent macrocyclic lactone product3. ZERMEX® 0.5% w/v Pour-On also provides persistency for up to 6 weeks. 

Shortest Meat Withdraw 

ZERMEX® 0.5% w/v Pour-On has the shortest meat withdraw of just 14 days meaning cattle can be slaughtered within a shorter timeframe. 


ZERMEX® 0.5% w/v Pour-On is formulated in an oily solution which is weatherproof meaning efficacy is not affected by rainfall before or after treatment. 

Less Toxic to Dung-Dwelling Insects: 

  • ZERMEX®0.5% w/v Pour-On is less toxic to dung-dwelling insects: residues in dung following treatment with moxidectin are less toxic to dung-dwelling insects than residues following treatment with other group 3 wormers. All group 3 products can reduce insect activity in the dung, however moxidectin has the least impact.4 
  • Dung-dwelling insects are important as they help remove dung from the pasture, limiting the spread of gastrointestinal parasitesand improving soil permeability. 
  • Manure is the breeding ground for some species of fly, so by allowing the dung beetles to remove the manure swiftly, this will decrease the fly challenge that is seen on farm. 
  • Based on the number of insect species affected and the duration of suppression, the macrocyclic lactones can be ranked in descending order of adverse events4. 



To find your local Downland retailer visit: 


Control of Worms Sustainably (COWS)
2 Zermex Pour-On has a persistent effect in preventing re-infection by Ostertagia ostertagi for 5 weeks and Dictyocaulus viviparus for 6 weeks after a single dose. Zermex Pour-On gives optimal pasture protection against stomach worm and lungworm with an 8–10 week dosing interval.
3 Prichard, R. K., et. al., International Journal for Parasitology: Drugs and Drug Resistance, 2019.
Floate, KD et al (2002) Bulletin of Entomological Research 92, 471-481
Sands B, Wall R. Dung beetles reduce livestock gastrointestinal parasite availability on pasture. J Appl Ecol. 2016  


ZERMEX® 0.5% w/v Pour-On for Cattle contains moxidectin, POM-VPS. May be prescribed by any Registered Qualified Person (RQP – a veterinarian, a pharmacist or an appropriately qualified SQP). For further information see the SPC, farmers should contact their animal medicines supplier SQP, veterinary surgeon or Downland Marketing Ltd, Warwick Mill, Warwick Bridge, Carlisle CA4 8RR. Use medicines responsibly:  MM-13467 



13th April 2021

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