Frontline Spot On: what the range actually does
Frontline Spot On is a fipronil-based flea and tick treatment applied directly to a dog or cat's skin, and it's one of the best-known names in the category. Rather than a run-down of star ratings we haven't collected, this page explains what the range actually does, how the products differ from each other, and what owners typically weigh up when choosing between them.
How a spot-on treatment like this works
The liquid is applied to the skin, usually between the shoulder blades, and spreads across the body through the coat's natural oils rather than being absorbed into the bloodstream. Fleas and ticks are killed on contact as they come into contact with the treated skin and coat, which is why coverage across the whole body matters more than the single application point suggests.
Frontline is applied once a month as routine protection, following the instructions on the specific pack for your pet's weight and species, since dog and cat formulations are not interchangeable.
Spot On versus Plus — the actual difference
Frontline Spot On treats adult fleas and ticks on contact. Frontline Plus contains the same active ingredient plus an insect growth regulator, which works on flea eggs and larvae in the surrounding environment rather than just the adult flea on the animal. For a straightforward adult flea problem either works on the fleas themselves, but Plus is the better choice where breaking an established infestation in the home is also the goal.
Both are available as general sale products rather than needing a prescription, which is why they're widely stocked rather than restricted to veterinary supply. That's a different position from some other Frontline-branded products, which are only available through a vet, so it's worth checking the specific pack rather than assuming the whole range is sold the same way.
What owners typically want to know before buying
The most common questions are practical rather than technical: how quickly it starts working, whether it's waterproof after a bath, and whether it's genuinely different from a cheaper own-brand alternative. The active ingredient and mechanism are what actually matter for effectiveness, and Frontline's is well established, having been on the market for a long time.
Choosing between Frontline and a cheaper alternative often comes down to whether an existing flea problem in the home needs addressing, in which case the egg and larvae action in Frontline Plus specifically is worth the difference, versus simple ongoing prevention, where either can do the job.
From this brand
Everything below is in stock with us, priced with delivery worked out, and packed and posted by hand in the UK.
Frontline Spot on Dog 3 Pipettes
Monthly fipronil spot-on flea and tick treatment for dogs, three pipettes
£30.49
Frontline Spot on Dog 1 Pipette
Monthly fipronil spot-on flea and tick treatment for dogs, single pipette
£11.35
Frontline Plus Dog 3 Pipettes
Frontline Plus spot-on flea and tick treatment for dogs, 3-pipette packs sized for medium or large
£34.89
Frontline Plus Small Dog - 1 Pipettes
Frontline Plus small-dog spot-on with fipronil and S-methoprene, for dogs weighing 2-10kg
£13.75
Frontline Plus Dog 1 Pipette
Frontline Plus spot-on for medium or large dogs, with fipronil and S-methoprene in size variants
£13.75
Frontline Plus Small Dog - 3 Pipette
A spot-on flea and tick treatment for small dogs, giving four weeks of protection per pipette
£34.89
Frontline Plus Large Dog - 6 Pipettes
6 pipettes of Frontline Plus spot-on for dogs 20-40kg, applied every 4 weeks
£57.59
Frontline Spot on Dog Medium - 6 Pipettes
Monthly spot-on flea and tick protection for medium dogs, 6 pipettes per pack
£49.99
Frontline Wormer Dog
Frontline Wormer dog tablets in two weight-specific variants, with two tablets per pack
From£8.15
Fleasolve Spot on Flea Treatment Dog
Vet-strength Fipronil spot-on flea and tick treatment, sized for large, medium or small dogs
From£6.19
Beaphar Fiprotec Combo Spot on for Dogs
Spot-on flea and tick treatment for dogs 20–40kg, three treatments per pack
From£9.33
Bob Martin Clear Plus Spot-On Flea, Tick & Lice Treatment Small Dogs
A two-ingredient spot-on for small dogs, 2-10kg, covering fleas, ticks and lice
£8.10
Common questions
- Does Frontline work straight away?
- It starts killing fleas on contact once applied and spread through the coat, but it's designed as ongoing monthly protection rather than a same-day fix for a heavy existing infestation. For an established flea problem in the home, treating the environment alongside the pet usually makes the bigger difference.
- What's the difference between Frontline for dogs and for cats?
- The formulations are dosed differently for each species and are not interchangeable — a dog product should never be used on a cat or vice versa. Always use the pack labelled for your pet's species and follow the weight guidance printed on it.
- Do I need a prescription for Frontline?
- No, Frontline Spot On and Frontline Plus are both available as general sale products without a prescription, which is why they're stocked widely rather than only through a vet. If you're ever unsure which product suits your pet, your vet can advise.
- Can I bathe my dog after applying Frontline?
- It's best to check the specific pack instructions, as recommended waiting times can vary. In general, giving the product time to fully distribute through the coat before a bath or swim helps it work as intended.
Related
Written by Matt Garnett, who runs Giddy Pets and is a lifelong pet owner — not a vet. This is general information, not veterinary advice, and it cannot replace an examination by the vet who knows your animal. How we write these guides.