Frontline Tri-Act Spot On Dog Medium 10-20kg 3x2ml


Earn 348 Reward Points

No reviews


In stock
Get this item this weekend if you choose Weekend Delivery at checkout
FREE DELIVERY on most UK orders over £39
Delivery to most EU Countries from £7.99
Standard Delivery 2 - 4 working days
Exceptions & regional surcharges may apply


Give your dog a new level of parasite protection, FRONTLINE Tri-act® FOR DOGS has a unique formula that kills faster and repels more disease-carrying parasites than the next leading competitor brand.  Used every 4 weeks, it is the next level in parasite control for dogs, providing long-lasting protection against flying insects as well as fleas and ticks whilst also preventing home flea infestations.

FRONTLINE Tri-act FOR DOGS helps to keep your dog active, healthy and happy by working against a range of common UK parasites that can transmit diseases or cause irritation to your dog.  Use every 4 weeks for optimal protection. 



  • Starts killing fleas in just 5 minutes
  • Kills newly arriving fleas and ticks on your dog within 6 hours and keeps working for the whole duration of treatment
  • Kills mosquitoes, biting flies and sandflies


  • Repels ticks for 4 weeks
  • Helps reduces the risk of tick-borne diseases
  • Repels flying insects for up to 5 weeks to prevent them from biting


  • Prevents a flea infestation in your home when used every 4 weeks by killing fleas before they can lay eggs.

Clinically proven and formulated specifically for dogs, FRONTLINE Tri-act® FOR DOGS is also water-resistant after 48 hours – so your dog can enjoy occasional swimming and bathing and still stay protected.

Suitable for: Dogs aged 8 weeks or older weighing between 10 - 20kg

Contents: 3 x 2ml pipettes


If your dog is unwell, please see your vet for advice before you apply a flea treatment.

Login to Post Review


Be the first to post a review.

Feeding Guide

FRONTLINE Tri-Act® FOR DOGS is not suitable for use on cats or rabbits. Use every 4 weeks to help protect your dog from fleas, ticks, mosquitoes, stable flies and sand flies.

Bathing/shampooing/water exposure does not affect the efficacy of the product as long as it doesn’t occur more than once a week or within 2 days of application of the product.


Fipronil and Permethrin


This and similar products can be found in: Dog Flea Treatments  |  Dog Health  |  Dog Health Products: All  |  Frontline  |  Pet Health  |  Pet Health: All