Best Flea Treatment for Dogs UK: How to Choose the Right Option
Not every flea treatment suits every dog. Compare formats, lifestyle fit, and what’s actually licensed for general sale vs prescription-only in the UK.
August 17, 2026
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Vectra 3D Spot-On Flea and Tick Treatment for Dogs
From Price range: £16.59 through £29.74
Vectra 3D Spot-On Flea and Tick Treatment for Dogs
From Price range: £16.59 through £29.74
FOR DOGS ONLY
Vectra 3D is a flea, tick and biting fly spot-on for dogs, made by Ceva. Five sizes by weight, for dogs from 1.5kg. Use it as the product leaflet directs.
- Fleas: treats and prevents for 1 month
- Ticks: killed and repelled for up to 1 month
- Repels sand flies, mosquitoes and stable flies for 1 month
Never use on cats. It can cause fatal fits in cats. NFA-VPS: a vet, pharmacist or SQP must be satisfied it suits your dog before supply.
Order Monday to Friday before 14:00pm to guarantee next
day delivery.
Ordering Prescription-Only Products
This item requires a current prescription from your vet before we can dispatch it. The good news? Sorting it out is simple and only takes a moment.
- Select or register your pet
- Attach a clear image or PDF of the prescription
- Complete your order at checkout
As soon as your prescription reaches us, our team will verify the details and get your pet’s treatment posted out to you.
Order Monday to Friday before 14:00pm to guarantee next
day delivery.
Product Features
FOR DOGS ONLY
Vectra 3D is a flea, tick and biting fly spot-on for dogs, made by Ceva. Five sizes by weight, for dogs from 1.5kg. Use it as the product leaflet directs.
- Fleas: treats and prevents for 1 month
- Ticks: killed and repelled for up to 1 month
- Repels sand flies, mosquitoes and stable flies for 1 month
Never use on cats. It can cause fatal fits in cats. NFA-VPS: a vet, pharmacist or SQP must be satisfied it suits your dog before supply.
Product Details
Vectra 3D for dogs: fleas, ticks and biting flies in one spot-on
Vectra 3D contains three active ingredients. Dinotefuran kills adult fleas on contact (it overstimulates the flea’s nerves). Pyriproxyfen stops flea eggs hatching and larvae developing for 2 months (it copies an insect growth hormone). Permethrin kills and repels ticks, mosquitoes and biting flies (it disrupts their nerve cells). The three spread across your dog’s skin and coat within the first day.
Keep cats safe
Cats can’t break down permethrin. Keep cats away from your dog until the application site is dry, and don’t let a cat groom a recently treated dog. If a cat is exposed and becomes unwell, wash it with shampoo or soap and contact your vet straight away.
Safe use
Children shouldn’t handle your dog for 4 hours after treatment, and your dog shouldn’t sleep with anyone on treatment day. Pregnant women shouldn’t apply Vectra 3D, and women who could become pregnant should wear gloves. Keep your dog out of ponds, rivers and streams for 48 hours.
Side effects are rare (up to 1 in 1,000 dogs): redness or itching where applied, restlessness, trembling, tiredness or low appetite. A wet or spiky look to the coat where applied usually fades within 48 hours. Talk to your vet if signs persist.
Legal category: NFA-VPS
View the official product information: 1.5kg to 4kg | 4kg to 10kg | 10kg to 25kg | 25kg to 40kg | Over 40kg
Instructions
Choose the applicator by your dog’s weight.
Use Vectra 3D exactly as the product leaflet directs. Full directions for use are in the NOAH Compendium datasheet.
Ask your vet or pharmacist if you are unsure how to apply it.
Sizes
- Dogs 1.5kg to 4kg: 0.8ml applicator
- Dogs over 4kg to 10kg: 1.6ml applicator
- Dogs over 10kg to 25kg: 3.6ml applicator
- Dogs over 25kg to 40kg: 4.7ml applicator
- Dogs over 40kg: 8ml applicator
Each pack contains 3 applicators. Not for dogs under 1.5kg or puppies under 7 weeks.
Key Benefits
- Covers fleas, ticks, sand flies, mosquitoes and stable flies in one treatment
- Stops fleas multiplying in your home for 2 months
- Stays effective after swimming or bathing from 48 hours after treatment
- Repels ticks and biting flies, helping stop bites
Ingredients
Active ingredients per ml: dinotefuran 54mg, pyriproxyfen 4.84mg and permethrin 397mg.
Also contains N-octyl-2-pyrrolidone and N-methylpyrrolidone.
Vectra 3D for dogs specification
| Brand | Vectra 3D |
| Manufacturer | Ceva |
| Active ingredients | Dinotefuran, pyriproxyfen, permethrin |
| Form | Spot-on solution |
| For | Dogs only. Never cats |
| Sizes | 5 sizes, from 1.5kg to over 40kg |
| Starts working on fleas | Within 12 hours of first treatment |
| Flea protection | 1 month |
| Flea eggs and larvae | Stops development for 2 months |
| Tick protection | Brown dog tick and sheep tick 1 month. Marsh tick up to 3 weeks |
| Ticks already on your dog | May take up to a week to die |
| Biting flies | Repels sand flies, mosquitoes and stable flies for 1 month |
| Water | Stays effective after swimming and bathing from 48 hours |
| Minimum age and weight | 7 weeks and 1.5kg |
| Shelf life | 3 years unopened |
| Legal category | NFA-VPS |
| UK licensed since | 2013 |
Disclaimer: For information on safe use, see the NOAH Compendium datasheet.
How ordering works
No prescription needed for this item. A vet, pharmacist or SQP checks every order before it’s supplied.
Legal category: NFA-VPSChoose size and pack
Pick the weight band or pack size you need, then add to basket.
Check out in 3 steps
Delivery method, billing, payment. Free standard delivery over £50.
Packed and posted
Royal Mail Standard (2–3 working days) or 24 First Class (1 working day). Unbranded, secure packaging.
Frequently asked questions
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