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Genuine pet medicine
FRONTLINE TRI-ACT® is a spot-on solution with a triple-action formula that kills newly arriving fleas and ticks within 6 hours. It also repels flying insects for up to 5 weeks and is available in convenient 3-dose packs. We offer a full range of sizes for dogs weighing 5 kg and above, with a guide for dogs over 40 kg.
FRONTLINE TRI-ACT® is a spot-on solution with a triple-action formula that kills newly arriving fleas and ticks within 6 hours. It also repels flying insects for up to 5 weeks and is available in convenient 3-dose packs. We offer a full range of sizes for dogs weighing 5 kg and above, with a guide for dogs over 40 kg.
FRONTLINE TRI-ACT® Spot-On Solution for Dogs – 3-Dose Pack
FRONTLINE TRI-ACT® is a spot-on treatment for dogs that protects them from fleas, ticks, mosquitoes, biting flies, and sandflies. It contains fipronil and permethrin, working quickly to keep your dog safe and comfortable.
It kills newly arriving fleas and ticks within 6 hours from 2 days after treatment. It also repels ticks for 4 weeks and flying insects for up to 5 weeks, helping prevent bites. When used every 4 weeks, it stops flea infestations in the home by killing fleas before they can lay eggs.
FRONTLINE TRI-ACT® gives your dog fast, long-lasting protection, so they can enjoy playtime and outdoor adventures without the worry of fleas, ticks, or biting insects.
It’s available in 3-dose packs.Please remember it’s always best to treat the dog according to their lifestyle. For example, dogs who go to
areas where wildlife such as hedgehogs, foxes or other animals can roam will be at higher risk of picking up fleas and ticks than those who don’t.
There are 3 different pack sizes available for dogs:
For dogs above 40 kg bodyweight, use the appropriate combination of two pipette sizes that most closely matches the bodyweight.
The active ingredients in FRONTLINE TRI-ACT are fipronil and permethrin.
Select the treatment you would like to order
Provide all the information about your pet
Your order will be sent in discreet packaging.
Yes. POM-V items require a valid prescription from your UK vet.
Upload your prescription during checkout.
Photos must be clear. If details are wrong or expired, orders can’t be processed. This is standard across UK pet pharmacies.
No. Under UK law, vets must provide a written prescription if you request one for a POM-V medicine. They may charge a reasonable fee for issuing it, but they cannot refuse. This allows you to choose where to buy your pet’s medication, whether directly from your vet or from a registered UK pharmacy such as Ashcroft 4 Pets.
In the UK, most POM-V prescriptions are valid for 6 months, unless your vet specifies a shorter duration. Prescriptions for Schedule 2 or 3 controlled medicines are usually valid for 28 days and are not repeatable. At Ashcroft 4 Pets, we follow these same UK veterinary guidelines to ensure your pet’s medication is dispensed safely and legally.
At Ashcroft 4 Pets, we are a fully VMD-registered and accredited online retailer. This means every prescription and over-the-counter pet medicine we supply is safe, genuine, and dispensed according to UK law.
We follow all Veterinary Medicines Directorate (VMD) rules, and our team checks every prescription carefully before processing. You can order with confidence, knowing your pet’s health is in the hands of experts and all medicines are traceable, legally supplied, and authentic.
In the UK, most repeat prescriptions for POM-V medicines are valid for up to 6 months from the date your vet issues them. You can order multiple times within this period if your vet has authorised repeats.
For controlled medicines (Schedule 2 or 3), the prescription is valid for 28 days only and cannot be repeated. These medicines are strictly regulated due to their potential for misuse.
At Ashcroft 4 Pets, we follow UK law carefully, ensuring all prescriptions are dispensed safely, legally, and in the exact amounts prescribed.
If your vet prescribes a human medicine for your pet under the Cascade, we can usually dispense against that prescription (with the right checks).
Many pet owners wonder if the tiny pests bothering their furry friends can make the jump to humans. The short answer is yes, humans can be bitten by fleas from dogs and cats, but there is more to the story
Can cats get fleas in winter? Yes, they absolutely can. I have seen many cases where fleas persist throughout winter, and in some homes, the problem actually becomes more noticeable during this time. Why Fleas Don’t Just “Freeze Away” I
Yes, they absolutely can. I have treated many cases during the winter months, and in some situations, the infestations were even worse than in summer. Why Fleas Don’t Just “Freeze Away” I used to think cold weather would naturally eliminate
