Stronghold for Cats is a powerful prescription-only treatment that provides broad-spectrum protection against common feline parasites. With just one monthly application, it treats fleas, ear mites, lice, roundworms, hookworms, and helps prevent heartworm disease - all in a single, easy-to-use pipette.
Whether your cat lives indoors or explores outdoors, Stronghold offers dependable defence with minimal fuss, keeping both your cat and your home parasite-free.
Key Benefits:
Kills adult fleas and prevents flea eggs from hatching
Treats ear mites, lice, and some intestinal worms
Helps prevent heartworm disease
Monthly application for ongoing protection
Suitable for kittens from 6 weeks of age
Easy spot-on formula
How to Use:
Select the correct pipette for your cat’s weight.
Snap off the tip of the pipette.
Part the fur at the base of the neck and apply directly to the skin.
Allow the area to dry naturally.
Avoid bathing your cat for at least 2 hours after application.
Always follow your vet’s instructions and read the accompanying leaflet thoroughly before use.
Prescription Requirement:
Stronghold is a POM-V medicine, which means a valid veterinary prescription is required before we can dispatch your order.
Upload your prescription at checkout or email it to us after placing your order. If you're unsure how to obtain a prescription, speak with your vet or feel free to contact our team for guidance.
Available Strengths:
15mg - Small Cat / Kitten (Up to 2.5kg)
Suitable for kittens and small cats weighing up to 2.5kg. Provides gentle but effective protection during early development or for petite adult cats.
45mg - Medium to Large Cat (2.6-7.5kg)
Designed for most adult cats, this dose offers full-spectrum parasite protection for cats weighing between 2.6kg and 7.5kg.
60mg - Extra Large Cat (Over 7.5kg)
For cats weighing more than 7.5kg, this strength ensures extended coverage. One or more pipettes may be advised, always follow your vet’s prescription.
Legal Category: POM-V
How to order prescription medication
Certain products are classified as Prescription Only Medicines. For these products we require a legally valid veterinary prescription prior to dispensing and dispatching.
You can do this in three easy steps:
1. Request a prescription from your vet.
2. Add you prescription product(s) to your basket
3. Upload* or send your prescription to us as part of the checkout process.
* For some medication (eg Controlled Drugs) we need to be in receipt of the original valid prescription prior to dispatch, and so we will require you to post the original prescription to us. The website will inform you if this is the case.
How can I send my prescription electronically to you?
You can upload your prescription via the website as part of the checkout process or, if preferred you can email it to us at [email protected]
When emailing your prescription to us please write your order number at the top of the prescription to help us match it against your account.
Please note that for some medication (eg Controlled Drugs) we need to be in receipt of the original valid prescription prior to dispatch, and so we will require you to post the original prescription to us. The website will inform you if this is the case.
Where should I send my original prescription to?
Where we require (or you choose to send) an original prescription by post, please write your order number at the top of the prescription and send it to:
Pharmacy2U (The PharmPet Co)
Unit 3 Mountpark Bardon
Robson Way
Ellistown
Coalville
LE67 1GQ
What parasites does Stronghold treat in cats?
Stronghold protects cats against fleas, ear mites, lice, roundworm, hookworm, and prevents heartworm disease.
How often should I apply Stronghold to my cat?
Apply once monthly for continuous protection against both internal and external parasites.
Is Stronghold suitable for all cats?
Stronghold is safe for cats and kittens from 6 weeks of age. Always select the correct dosage based on your cat’s weight and follow vet guidance.
Does Stronghold kill flea eggs as well as adults?
Yes. Stronghold kills adult fleas and prevents flea eggs from hatching, helping to stop infestations before they start.
Is a prescription required for Stronghold?
Yes. Stronghold is a prescription-only medicine (POM-V) in the UK. You’ll need to upload a valid veterinary prescription at checkout.
Please see a summary of our delivery terms and charges below, if you require more information please refer to our Delivery & Returns page which can be found here.
When will my order be dispatched?
We aim to dispatch orders within 1 to 2 working days (Monday to Friday, excluding public holidays).
There may be times when your product is dispatched from one of our P2U partners, and this may extend to 3 working days.
Once your order is dispatched, you will receive a dispatch confirmation email from us with an order number.
In the event of an item being out of stock, we will contact you with the expected delivery time.
When will I receive my order?
Orders placed with Royal Mail Tracked 48 will aim to be delivered within 3 – 5 days of dispatch.
Orders placed with Royal Mail Tracked 24 will aim to be delivered within 1 – 2 days of dispatch.
Orders placed with Courier Delivery (Signed for) will aim to be delivered the next working day after dispatch.
Orders dispatched from one of our P2U partners will aim to be delivered within 3 days of dispatch.
How much does delivery cost?
We offer free delivery for orders over £35 to mainland UK*
All other orders are subject to the following delivery charges:
UK Mainland Royal Mail Tracked 48 (up to 2kg) and orders dispatched from one of our P2U partners:
Under £35 spend: £2.99
Over £35 spend: Free
UK Mainland Royal Mail Tracked 24 (up to 2kg):
Under £35 spend: £3.99
Over £35 spend: £3.99
UK Mainland (excluding highlands**) Courier Delivery (Signature required):
Under £35 Spend: £7.99
Over £35 Spend: £7.99
Refrigerated Lines: UK Mainland (excluding Highland, Northern Ireland and the Channel Islands***) Courier Delivery (Signature required): £9.99
It is important that you are available on the day to sign for and receive the medication. If you are not available to receive the delivery, please contact us to discuss your options. Due to the storage requirements of these products we will not be able to leave these orders in a safe place or with a neighbour.
Currently we are unable to do Tracked 24 or express deliveries on our Nutrition range (food & treats).
*Some products can only be delivered via courier e.g. orders over 2kg, fridge lines, high risk medication and controlled drugs. For these lines there is a chargeable courier fee and a signature will be required on delivery.
**For any orders that require a courier delivery to the UK Highlands an additional charge will be included during the checkout process.
***We regret that we are unable to deliver refrigerated products to the UK Highlands, Northern Ireland and the Channel Islands.
Additional information
For medication orders that can be posted through your letterbox (e.g. non signed for orders) you must ensure that there will be no children or animals who could have access to the posted medication. The PharmPet Co accepts no liability in the event of another person(s) or animal(s) residing at or visiting the property gaining access to the posted medication.
