Switch ® Switch

Switch ®

A pour-on solution formulated to aid in the control of Sweet Itch, otherwise known as Summer Seasonal Recurrent Dermatitis. Switch is a long-lasting insecticide and fly repellent which rapidly kills biting insects. It can provide up to one week’s protection from each application. Switch can be used on both horses and donkeys.

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When To Use

Warmer months

Use before the start of the season to help prevent Sweet Itch developing


Switch can also be used throughout the winter if necessary

Signs of Sweet Itch

Switch is most commonly used to combat Sweet Itch, a condition thought to affect about 5% of horses in the UK. Sweet Itch is most common in horses aged 1-5 years in the warmer months, when midges and flies are more common, although it can also occur in the winter. Once a horse has had Sweet Itch, it tends to re-occur annually for the lifetime of the animal.

Typically affected areas include; the top of the tail and back, base of mane/forelock, withers and face. Signs include:

  • Itching/rubbing infected areas
  • Hair loss
  • Skin thickening or discolouration
  • Restlessness, agitation or pacing
  • Excessive grooming
  • Scabs or crust

Why Should I See My Vet?

At VetPlus we believe vets are best placed to advise on the right course of action for your horse. Switch can aid in preventing bites and repelling insects but if there are any signs of more serious problems like infected skin wounds, you should seek the advice of your vet.

Next Steps

Our products are only available through veterinary practices. To find your closest vet practice stockist, please visit our Vet Search page.

Find my local stockist

What Else Can I Do?

Follow the below guidelines for helping to prevent Sweet Itch:

  • Use well drained fields for grazing
  • Stable horses during periods of peak midge activity such as dawn and dusk
  • Use fly rugs during midge season
  • Use a fan in the stable
  • Graze on high, windy ground if possible

Application Guidelines

Apply the following amount (up to a maximum of 40ml) to areas most commonly affected such as the mane and rump. The bottle features a calibrated dispensing chamber for easy application.

Handle product with care and do not let the product come into contact with cats.

Legal category AVM-GSL

Weight Dosage
Less than 100kg 10ml
101-200kg 20ml
201-300kg 30ml
Over 300kg 40ml


Switch contains a unique formulation with Permethrin as the active ingredient at a concentration of 4%. The unique non-greasy formula also contains another insect killing/repellent ingredient Butyl Dioxitol.

All of our products are manufactured in Lytham, Lancashire to GMP Standard. To find out more about our manufacturing facility, click here.


Contact the vet you purchased Switch from for guidance on the use of Switch for your horse or donkey. They’ll be able to provide specialised advice for your animal due to the records they keep. If you are unable to get the information you need from your vet, or if you bought Switch elsewhere, please contact us for assistance.

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