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Genuine pet medicine
Flea, Tick & Wormers
Flea, tick and worm treatments for dogs and cats, including spot-ons, tablets and chews, and sprays. We stock general sale, NFA-VPS and prescription-only medicines. Each product page shows its legal category, and prescription items need a valid prescription from your vet at checkout.
Treatments we stock include Frontline Plus for Dogs, Frontline Plus for Cats, Simparica Trio, Stronghold and Frontline Homegard for the home.
How it works to order pet prescription medications online
Choose your
treatment
Select the treatment you would like to order
Upload a prescription copy at
the checkout
Provide all the information about your pet
Express
Delivery
Your order will be sent in discreet packaging.
Overview
Parasite prevention and treatment
Fleas, ticks and worms are easy for dogs and cats to pick up outdoors, and they often show no early signs. Shop spot-ons, tablets and chews, and sprays, with and without a prescription.
Shop by type
Our range covers spot-ons, tablets and chews, and sprays, with and without a prescription.
Spot-on
Easiest to apply monthly.
Direct to the skin at the back of the neck, usually once a month. Keep pets apart until it’s dry, especially in multi-pet homes.
Tablets and chews
Nothing to dry and nothing for another pet to lick off, which suits multi-pet households and dogs that swim.
Collars
Looking for a flea collar?
Collars aren’t in our range yet. Get in touch and we’ll let you know when they’re available.
Sprays
Best used alongside a pet-worn treatment to cover the home environment, not usually as the only protection.
How these treatments work
Fleas
Spot-ons spread through the oils in your pet’s coat and kill fleas on contact. Tablets and chews work through the bloodstream, so they kill a flea once it bites. A few fleas after treatment is common, as new ones keep hatching from eggs and larvae in your home for several weeks.
Ticks
Some flea treatments are also licensed for ticks, and a few repel them. Most kill a tick after it attaches, so a brief bite can still happen, and the risk of tick-borne disease can’t be ruled out completely (SPC). Check your pet’s coat after walks in woodland or long grass.
Worms
Most wormers clear the worms already in your pet’s gut but give little lasting protection against new ones. That’s why you repeat worming on a schedule.
How often to treat
Most spot-on and tablet flea treatments are given monthly, though some last longer. How often to worm depends on your pet’s age, lifestyle and risk (ESCCAP GL1, 2025). A dog that scavenges, hunts or lives with young children usually needs worming more often than one that stays on the lead (ESCCAP).
Follow the label for your product’s exact interval, and ask your vet or our team what suits your pet.
Treating more than one pet
Never use a dog flea treatment on a cat unless the pack says it’s licensed for cats. Some dog products contain permethrin, which is extremely poisonous to cats, and a cat can be poisoned just by grooming a recently treated dog (PDSA).
Never use fipronil products on rabbits. Keep cats and dogs apart until a spot-on has dried, and check the species on every pack before applying.
Do you need a prescription?
It depends on the product’s legal category, which is shown on each product page:
- Prescription required (POM-V): upload a current prescription from your vet at checkout, or ask us how to get one.
- NFA-VPS: no prescription needed, but a vet, pharmacist or SQP checks if it’s suitable first, so you’ll answer a few questions about your pet at checkout.
- General sale (AVM-GSL): order as normal.
When to speak to your vet
- Fleas or ticks keep appearing despite on-time treatment.
- Your pet is very young, pregnant, unwell or on other medication.
- You notice weight loss, scooting, coughing or worms in your pet’s poo.
- Your cat is drooling, twitching or wobbly after any flea product. Treat this as an emergency.
FAQs
Can I use a dog flea treatment on my cat?
Only if the pack says it’s licensed for cats. Some dog treatments contain permethrin, which can be fatal to cats.
How often should I worm my dog?
It depends on lifestyle and risk. Dogs that scavenge, hunt, eat raw food or live with young children usually need worming more often. Follow the label, and ask your vet what suits your dog.
Do indoor cats need flea and worm treatment?
Usually, yes, though often less frequently than cats that go outside. Fleas can come in on shoes, clothes or other pets. Your vet can advise how often your cat needs treating.
How long does treatment take to work?
It varies by product and parasite. Check the product page, or ask our team if you need it for something time-sensitive.
Not sure which treatment suits your pet? Speak to our team. We can help you match a treatment to your pet’s age, lifestyle and any other medication they’re on.