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NFA-VPS Over the Counter Companion Animal

Diptron 50 mg Spot-on Solution for Cats

Active ingredient: Fipronil

Form

Spot-on

Species

Cats

Manufacturer

Química de Munguía S.A. (Quimunsa)

VMD MA No.

45883/4000

What it's used for

present on the animal at the time of product application will be killed within 48 hours. The product has persistent insecticidal efficacy lasting for 4 wee...

Full indications, dosage and side effects ↓
View official SPC (PDF)

The prescription itself has a price. See what practices near you charge for a consultation and the written prescription fee.

Paying less for Fipronil

  1. 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. 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.

Clinical information

Diptron 50 mg Spot-on Solution for Cats — SPC Details

Source: VMD Summary of Product Characteristics (SPC). Last updated 27 Mar 2026.

present on the animal at the time of product application will be killed within
48 hours. The product has persistent insecticidal efficacy lasting for 4 weeks
against Ctenocephalides felis fleas.
AN: 03129/2024 + 03130/2024
Treatment and prevention of tick infestations (Rhipicephalus turanicus). Ticks
present on the animal at the time of product application will be killed within
48 hours. The product has persistent acaricidal efficacy for 4 weeks against
Rhipicephalus turanicus ticks.'
1 pipette of 0.5 mL per cat
Method of administration –
Hold upright. Tap the narrow part of the pipette to ensure the contents are within
the main body of the pipette.
Break back the snap-off top from the spot-on pipette along the scored line. Part
the coat between the shoulder blades until the skin is visible. Place the tip of the
AN: 03129/2024 + 03130/2024
pipette on the skin and squeeze gently at one or two spots to empty its contents
onto the skin.
Care should be taken to avoid excessive wetting of the hair with the product since
this will cause a sticky appearance of hairs at the treatment spot. However,
should this occur, it will disappear within 24 hours post application.
In the absence of safety studies, the minimum treatment interval is 4 weeks.
Do not use on kittens less than 9 weeks old and/or weighing less than 1 kg.
Do not use on sick (systemic diseases, fever…) or convalescent animals.
Do not use in rabbits, as adverse reactions and even death could occur.
Do not apply on wounds or damaged skin.
Do not use in case of hypersensitivity to the active substance or to any of the
excipients.
Cat:
Rare
(1 to 10 animals / 10,000
animals treated):
Excessive salivation / drooling
AN: 03129/2024 + 03130/2024
Very rare
(<1 animal / 10,000 animals
treated, including isolated
reports):
Transient cutaneous reactions at the
application site (skin discoloration, local
alopecia, pruritus, erythema) and general
pruritus or alopecia. Hypersalivation, reversible
neurological signs (hyperaesthesia,
depression, nervous signs), vomiting or
respiratory signs.
Reporting adverse events is important. It allows continuous safety monitoring of
a veterinary medicinal product. Reports should be sent, preferably via a
veterinarian, to either the marketing authorisation holder or the national
competent authority via the national reporting system.
See also section 16 of the package leaflet for respective contact details.
During the period of expected efficacy, ticks will be killed and fall off the host
within 48 hours of infestation, usually without having had a blood meal. However,
the attachment of single ticks may occur after treatment and therefore the
transmission of infectious diseases by ticks cannot be excluded. Once dead, ticks
will often drop off the animal, but any remaining ticks can be removed carefully.
The impact of bathing/immersion in water or shampooing on product
effectiveness has not been investigated and therefore cannot be recommended,
especially within 2 days of product application.
For optimum control of flea problems in a multi-pet household, all dogs and cats
in the household should be treated with a suitable insecticide.
Fleas from pets often infest the animal's basket, bedding and regular resting
areas such as carpets and soft furnishings which should be treated, in case of
massive infestation and at the beginning of the control measures, with a suitable
insecticide and vacuumed regularly.”

Special precautions for use in the target species:
For external use only.
Avoid contact with the animal’s eyes.
AN: 03129/2024 + 03130/2024
Animals should be weighed accurately prior to treatment.
It is important to make sure that the product is applied to an area where the animal
cannot lick it off, and to make sure that animals do not lick each other following
treatment.
Special precautions to be taken by the person administering the veterinary
medicinal product to animals
This veterinary medicinal product may cause neurotoxicity. Keep stored pipettes
in the original packaging until ready to use. In order to prevent children from
getting access to used pipettes, dispose of used pipettes immediately.
People with a known hypersensitivity to fipronil or any of the excipients should
avoid contact with the veterinary medicinal product.
This veterinary medicinal product can cause mucous membrane and eye
irritation. Therefore, contact between the veterinary medicinal product and the
mouth or eyes should be avoided. In case of accidental ocular exposure or
irritation of the eyes during administration, these should be rinsed immediately
and thoroughly with plain water. If eye irritation persists, seek medical advice
immediately and show the package leaflet or the label to the physician.
Avoid contents coming into contact with the fingers. In case of dermal exposure,
wash immediately with soap and water.
Wash hands after use.
Do not smoke, drink or eat during application.
Treated animals should not be handled until the application site is dry, and
children should not be allowed to play with them 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.’
interaction
None known.
This veterinary medicinal product does not require any special storage conditions
Not applicable.

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.

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