£33.45 £11.15 each
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This is a specialist veterinary product. We will ask you a simple set of questions to confirm that you are buying the correct medicine for your pet and know how to use it safely

Medicinal category: NFA-VPS

New 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.  

DOGS ONLY - 2 to 5KG

Key Benefits

Starts killing fleas in just 5 minutes1 
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.

1. Halos et al. (2016) Parasites & Vectors, 9:57
FRONTLINE Tri-Act contains fipronil and permethrin. UK: NFA-VPS. 

Product Information

Detailed information on this veterinary medicine is available in the data sheet here and instructions will be included with the product. If you have questions about the use of this veterinary medicine, please contact us at or speak to your vet. Further information about veterinary medicines can be obtained from the Veterinary Medicines Directorate.

As this is a veterinary medicine, our Vet Team may on occasion contact you to ensure that this product is suitable for your pet.

Store below 25°C, in a dry place and in the original packaging.

Due to regulatory law and safety reasons this product cannot be returned after delivery and is excluded from our returns policy and exempt from the cool-off period.


How to protect your Dog:Weigh your pet and choose the correct size pipette for its weight. For topical use only.

Use monthly throughout the year for continuous flea and tick protection.

Make sure all pets in your home are treated regularly. How to apply:
Part the fur at the base of the neck in front of the shoulder blades and apply directly onto the skin in one spot.

Do not bathe Dogs within 2 days after application, then no more than once a week.

Dosage Guide

Dose: 1 pipette of 0.5 ml per dog Per month 

Size Guide

(W) 148mm x (D) 19mm x (H) 112mm 


The primary packaging is a heat-formed film of polyethylene-ethylvinyl alcohol-polyethylene/polypropylene.The secondary packaging consists of a plastic/aluminium blister with a plastic/aluminium backing.

Plastic card of 1 pipette containing 4 ml

Care & Use

FRONTLINE Tri-Act contains fipronil and permethrin. UK: NFA-VPS. Further information available in the SPC or  from  Boehringer  Ingelheim  Animal  Health  UK  Ltd,  RG12  8YS,  UK.  FRONTLINE  Tri-Act  is  a  registered trademark of the Boehringer Ingelheim Group. 2020 Boehringer Ingelheim Animal Health UK Ltd. All rights reserved. Date of preparation: Sept 2020. UI-PHC-0175-2020. Use Medicines Responsibly. This product is for Dogs only. 

Safety Advice

Care should be taken to avoid contact of the veterinary medicinal product with the dog’s eyes.

It is important to make sure that the product is applied to an area where the animal cannot lick it off and to make sure that other animals do not lick the treatment sites following application. Do not use on sick or convalescent animals.

DO NOT USE IN CATS - To prevent cats from being accidentally exposed to the product, keep treated dogs away from cats until the application site is dry. It is important to ensure that cats do not groom the site of application on a dog which has been treated with this product. In case of exposure of this type seek veterinary advice immediately