Horse Worming Information

We stock all the major horse wormers and can offer discounts on large orders. Please ask our advice on which is the most appropriate wormer to use on your horse.


Worms can cause fatal colic, weight loss, poor performance, rough coat, pot belly and stunted growth.

It is well worth having a worm control policy. This will be based upon many factors including your geographical location, the types and ages of horses that you have, your stocking density and the frequency with which horses come and go at your premises. Effective parasite control depends upon both management of grazing to minimise worm egg and larval contamination and the use of wormers to remove parasites from the horses' intestines. One cannot be adequately effective without the other.

The best known practice has been to worm horses every six to eight weeks. This is known as interval dosing. There are a number of ways that horse owners can reduce the frequency of treatment with worming drugs without putting their horses at risk of parasite disease:
Read the dosing instructions on the wormer packet carefully. Don't use more than that recommended.

Use a diagnostic test, to find out whether your horse needs worming.
Use pasture hygiene methods (picking up droppings) to help stop the spread of worms.

The range of horse wormers is huge and can be confusing especially as some of the brand names are very similar. Ask us for advice on the most appropriate product for your horse.


It is important to worm horses and ponies regularly and also to rotate the worming group. When rotating your wormer make sure you are choosing a different ingredient not just a different brand. Develop an effective worming programme on an annual basis using tactical worming for specific parasites and rotating active ingredients during the grazing season (not each time you worm your horse).

Select one of the distinct chemical groups, which are:

  • MACROCYCLIC LACTONES lvermectin and Moxidectin
  • TETRAHYDROPIRIMIDINES Pyrantel
  • BENZIMIDAZOLES Fenbendazole, Mebendazole, Oxibendazole

Combination wormers are also available containing lvermectin and Praziquantel, or Moxidectin and Praziquantel. These products offer great convenience at times when tapeworm treatment is required along with routine worming.

Use your selected group during a 12-18 month period with particular emphasis to rotation during the grazing season. The grazing season is May to October and although your selection of products may well be based on an annual selection it is the grazing season when particular attention should be paid to rotation of the active ingredients.


Tactical Worming

Although most of the leading brands of horse wormers are effective against adult redworms there are times when you will need to worm tactically to treat for specific worm types. Which ever chemical group you choose to use on an annual basis you will still need to dose tactically to control the encysted small redworm, tapeworm and bots.

  • Treat for Encysted Small Redworm Larvae during the winter months with Equest or Panacur 5 Day Equine Guard.
  • Treat for Bots during the winter months with Equest, Equest Pramox, Eqvalan, Eraquell, Vectin, Eqvalan Duo or Equimax
  • Treat for Tapeworm in Spring & Autumn with Strongid P, Pyratape P, Equimax, Eqvalan Duo, Equest Pramox or Exodus.
  • Treat for Large and Small Redworm during the grazing period with Equest, Strongid P, Pyratape P, Eqvalan Duo, Panacur, Telmin, Eqvalan, Eraquell, Vectin or Equimax. All products can be used year round for Large and Small Redworm treatment as part of a worming plan with specific products being used for strategic worming when necessary.



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