Fipralone Duo 402 mg/120 mg Spot-on Solution for Very Large Dogs
Active ingredients: Fipronil, Pyriproxyfen
Form
Spot-on
Species
Manufacturer
Alfamed
VMD MA No.
17902/5015
What it's used for
To be used against infestations with fleas alone or in association with ticks. Against fleas: Treatment and prevention of infestations by fleas prevents fu...
Full indications, dosage and side effects ↓The prescription itself has a price. See what practices near you charge for a consultation and the written prescription fee.
Paying less for Fipronil + Pyriproxyfen
-
1
Ask your vet for a written prescription
They must provide one on request. Under the CMA Order the fee is capped at £21 from 2027.
-
2
Fill it at a registered online retailer
The CMA found online pharmacies 50–60% cheaper than practice dispensing on common medicines — typically £200–£300 a year.
Done — we'll email you when prices land.
Prescription required
Your vet must provide a written prescription on request. You can then purchase from any licensed online retailer.
Fipralone Duo 402 mg/120 mg Spot-on Solution for Very Large Dogs — SPC Details
Source: VMD Summary of Product Characteristics (SPC). Last updated 26 Mar 2026.
Against fleas:
Treatment and prevention of infestations by fleas
prevents further infestations for 7 weeks.
Prevention of the multiplication of fleas by preventing flea eggs developing into adult fleas
for 12 weeks after application.
Against ticks:
Treatment of infestations by ticks (Ixodes ricinus).
One treatment provides persistent acaricidal efficacy for 2 weeks against,
and for 4 weeks against Dermacentor reticulatus and Rhipicephalus sanguineus.
If ticks of some species (Dermacentor reticulatus, ) are present
at the time of application, not all ticks may be killed within 48 hours.
Revised: August 2025
MA split from NI MA following AN: 03127/2024
Dosage:
Apply one pipette of 4.02 ml per dog for a dog weighing from 40 to 60 kg corresponding to
the minimal recommended dose of 6.7 mg fipronil /kg b.w. and 2 mg pyriproxyfen/kg b.w.
VolumeDog weightFipronil (mg)Pyriproxyfen (mg)0.67 ml2-10 kg6720.11.34 ml10-20 kg13440.22.68 ml20-40 kg26880.44.02 ml40-60 kg402120.6
For dogs over 60 kg the appropriate combination of pipettes should be used.
Method of administration:
Remove the pipette from the overblister. Hold the pipette upright. Tap the narrow part of
the pipette to ensure that the contents are within the main body of the pipette. Break the
snap-off top of the spot-on pipette along the scored line.
Part the pet’s coat on base of the neck before the shoulder blades until the skin is visible.
Place the tip of the pipette directly against the skin and squeeze gently several times to
empty the contents. If necessary the contents of the pipette can be administered at one or
two additional point(s) along the pet’s back to avoid run-off or more superficial application
to the hair coat, particularly in large dogs.
Drop stop system (the product is released only by pressing the body of the pipette.
Revised: August 2025
MA split from NI MA following AN: 03127/2024
One pipette provides a single treatment, with the possibility to repeat administrations on a
monthly basis.
For optimal control of flea and tick infestations and flea multiplication, the treatment
schedule can be based on the local epidemiological situation.
Do not use in cases of known hypersensitivity to the active substances or to any of the
excipients.
application site.
According to the accumulated experience on these active ingredients within spot on
pharmaceutical forms, transient cutaneous reactions at the application site (squamosis,
local alopecia, pruritus, erythema,
may be observed after use. Hypersalivation, reversible neurologic symptoms
(hyperesthesia, depression, nervous symptoms), respiratory signs or vomiting might occur.
These effects occur in very rare cases.
The frequency of adverse reactions is defined using the following convention:
- very common (more than 1 in 10 animals treated displaying adverse reaction(s))
- common (more than 1 but less than 10 animals in 100 animals treated)
- uncommon (more than 1 but less than 10 animals in 1,000 animals treated)
- rare (more than 1 but less than 10 animals in 10,000 animals treated)
- very rare (less than 1 animal in 10,000 animals treated, including isolated reports).
Revised: August 2025
MA split from NI MA following AN: 03127/2024
duration of activity. The product remains effective against fleas for 5 weeks when the dog
is shampooed at monthly intervals after treatment. If the dog requires shampooing, it is
better to do so before treatment.
Water immersion repeated on two occasions post treatment did not affect adulticidal
efficacy against fleas nor the efficacy related to the prevention of the development of flea
eggs into adult fleas.
The influence of water immersion or shampooing of the dog on the efficacy of the product
against ticks has not been evaluated.
At the beginning of the control measures, in the case of an infestation, the animal's basket,
bedding and regular resting areas such as carpets and soft furnishings should be treated,
with a suitable insecticide and vacuumed regularly.
To reduce environmental flea challenge, all animals living in the same household should
also be treated with a suitable flea control product.
The product does not prevent ticks from attaching to animals. Transmission of infectious
disease by ticks cannot be completely excluded if conditions are unfavourable.
Immediate efficacy has been demonstrated against , indicating that ticks of
this species are likely to be killed within 48 hours of product application. If
reticulatus or ticks are present when the product is applied,
these ticks may not be killed within the first 48 hours.
Once dead, ticks will often drop off the animal. Any remaining ticks should be carefully
removed, ensuring that their mouth parts are not left within the skin.
Special precautions for use in animals
For external use only.
Animals should be weighed accurately prior to treatment.
In absence of safety data, the product should not be used in puppies less than 10 weeks
old and/or weighing less than 2 kg.
Care should be taken to avoid the content of the pipette coming into contact with the eyes
or mouth of the recipient dogs. In particular oral uptake due to the licking of the application
site by treated or in-contact animals should be avoided.
Do not apply the product on wounds or damaged skin.
In the absence of additional safety studies, do not repeat the treatment at intervals of less
than 4 weeks.
The use of the product has not been studied in sick and debilitated dogs.
Revised: August 2025
MA split from NI MA following AN: 03127/2024
Special precautions to be taken by the person administering the veterinary medicinal
product to animals
The product may cause neurotoxicity.
The product may be harmful if swallowed.
Avoid ingestion including hand to mouth contact.
Do not smoke, drink or eat during application.
In the event of accidental ingestion, seek medical advice immediately and show the
package leaflet or the label to the physician.
This product can cause eye and mucous membrane irritation.
Avoid contact with skin, eye and mouth, including hand to eye contact.
In the case of accidental skin or eye contact, immediately and thoroughly flush with water.
If skin or eye irritation persists, seek medical advice and show the package leaflet or the
label to the physician.
Wash hands after use.
Treated animals should not be handled until the application site is dry, and children should
not be allowed to play with treated animals until the application site is dry. It is therefore
recommended that animals are not treated during the day, but should be treated during the
early evening, and that recently treated animals should not be allowed to sleep with
owners, especially children.
Keep the pipettes in the original packaging until ready for use and dispose of used pipettes
immediately.
Other precautions
Fipronil and pyriproxyfen may adversely affect aquatic organisms. Dogs should be
prevented from accessing streams and rivers for 48-hours following treatment (see also
section 6.6).
The product may have adverse effects on painted, varnished or other household surfaces
or furnishings. Allow the application site to dry before permitting contact with such
materials.
Store in a dry place.
Keep the blister pack in the outer carton in order to protect from light.
5.
This information is sourced from the official Summary of Product Characteristics (SPC) published by the Veterinary Medicines Directorate (VMD). It is provided for informational purposes only and does not replace professional veterinary advice. Always consult your vet before administering any medication.
Medication costs adding up?
Pet insurance can cover prescription medications. Find the right policy for your pet.
Related Conditions
Other Products Containing Fipronil
These products share the same active ingredient and may be suitable alternatives. Always consult your vet.
Alfamed 2.5 mg/ml Cutaneous Spray, Solution for Cats and Dogs
POM-VAlfamed
Alfamed 2.5 mg/ml Cutaneous Spray, Solution for Cats and Dogs
POM-VAlfamed
Alfamed Fipronil 134 mg Spot-on Solution for Medium Dogs
NFA-VPSAlfamed
Alfamed Fipronil 134 mg Spot-on Solution for Medium Dogs
NFA-VPSAlfamed
Alfamed Fipronil 2.5 mg/ml Cutaneous Spray, Solution for Cats and Dogs
POM-VAlfamed
Alfamed Fipronil 2.5 mg/ml Cutaneous Spray, Solution for Cats and Dogs
POM-VAlfamed
Alternative options to consider
Retailers we earn a commission from. It costs you nothing and never changes what we show.
Flea & Tick Treatments for Dogs
Vet-strength flea and tick treatments at pharmacy prices. Frontline, Advocate, Bravecto, Nexgard and more.
Pet Flea Treatments at Pharmacy2U
Frontline, Advantage and own-brand flea treatments at pharmacy prices. Trusted UK pharmacy since 1999.
VetBox Flea & Worm Protection for Dogs
Vet-founded monthly parasite subscription. Flea, tick and worm protection delivered to your door. Founded by Dr Will Woodley, protecting 30,000+ pets.
We may earn a small commission if you purchase through these links, at no extra cost to you.
Related Medications
Advantage 100 mg Spot-on Solution for Medium Dogs
AVM-GSLImidacloprid
Advantage 100 mg Spot-on Solution for Medium Dogs
AVM-GSLImidacloprid
Advantage 100 Spot-on Solution for Dogs
NFA-VPSImidacloprid
Advantage 100 Spot-on Solution for Dogs
NFA-VPSImidacloprid
Advantage 250 mg Spot-on Solution for Large Dogs
AVM-GSLImidacloprid
Advantage 250 mg Spot-on Solution for Large Dogs
AVM-GSLImidacloprid
Find cheaper vets near you
Compare vet consultation prices in your area. Save on procedures and get a prescription to buy medications online.