Welcome to the Pet Shield range at Weldricks Pharmacy — licensed flea, tick and worm treatments for cats and dogs.
Pet Shield is a range of veterinary licensed, over-the-counter parasite treatments manufactured by KRKA, covering flea and tick protection with Flea Screen Combo, and worm treatment with Worm Screen tablets or the Worm Screen Spot-on solution for cats. All are designed to be straightforward to use at home, without the need for a prescription.
Regular use helps protect your pet from fleas, ticks and common intestinal worms, while also helping to prevent these parasites from establishing themselves in your home. Weldricks Pharmacy stocks the full Pet Shield range for cats and dogs of all sizes, with free UK delivery on orders over £40.
Pet Shield covers flea, tick and worm protection for cats and dogs across three product types. Knowing the difference helps you pick the right treatment for your cat or dog.
Contains fipronil and (S)-methoprene. Fipronil kills adult fleas within 24 hours and ticks within 48 hours, while (S)-methoprene stops flea eggs and larvae developing — breaking the flea life cycle in your home, not just on your pet.
Film-coated tablets treating roundworms, hookworms and tapeworms. The cat tablet contains praziquantel and pyrantel embonate; the dog tablet adds febantel for broader-spectrum cover. Can be given directly or hidden in food, and split into halves or quarters.
A spot-on alternative to tablets, for cats who are difficult to dose orally. Contains praziquantel and emodepside, treating roundworms, hookworms (including Ancylostoma tubaeforme) and tapeworms (including Dipylidium caninum and Echinococcus multilocularis).
| Product | Treats | Format | Suitable for | Protection |
|---|---|---|---|---|
| Flea Screen Combo Cats |
Fleas, ticks & lice | Pipette, back of neck | Cats/kittens from 8 weeks, 1kg+ | 4 weeks flea / 2 weeks tick |
| Flea Screen Combo Dogs |
Fleas, ticks & lice | Pipette, back of neck | Dogs/puppies from 8 weeks, 2kg+ (weight-banded packs) | 8 weeks flea / 4 weeks tick |
| Worm Screen Tablet |
Roundworms, hookworms, tapeworms | Oral tablet, split for dosing | Cats from 6 weeks (1kg+); dogs from 2 weeks (2–40kg) | Single treatment — repeat as advised |
| Worm Screen Spot-on Cats only |
Roundworms, hookworms, tapeworms | Pipette, base of skull | Cats from 8 weeks, 0.5kg+ (3 pack sizes) | Single treatment — repeat as advised |
Important safety information: Flea Screen Combo for dogs must never be used on cats, ferrets or rabbits — this can cause serious or fatal reactions. The cat and dog versions of Flea Screen Combo are not interchangeable.
Worm Screen tablets must not be used in pregnant cats; in pregnant dogs, avoid during the first two-thirds of pregnancy and seek veterinary advice. Worm Screen Spot-on should not be bathed off until fully dry, and cats should be prevented from licking the application site — contact your vet if salivation, vomiting or tremor occur after accidental licking.
Always check pack instructions for minimum age and weight, and speak to your vet or our pharmacy team if your pet has a chronic health condition or you're unsure which treatment is right for them.
Pet Shield is manufactured by KRKA. At Weldricks Pharmacy, we're dedicated to supporting your pet's health with quality, licensed products like Pet Shield — backed by our friendly, professional service and convenient delivery options, including free UK delivery on orders over £40.
Pet Shield, made by KRKA, covers three product types: Flea Screen Combo (spot-on flea and tick treatment, separate cat and dog versions), Worm Screen tablets (for cats and dogs), and Worm Screen Spot-on solution (a wormer for cats only). All are stocked at Weldricks Pharmacy.
Regular treatments are crucial for preventing parasitic infestations. Fleas can cause intense itching, skin infections, and even transmit diseases, while various types of worms can lead to digestive issues, nutrient deficiencies, and in severe cases, more serious health problems. Consistent use of products like Pet Shield helps keep your pet healthy and happy.
Pet Shield products are formulated separately for cats and dogs. Flea Screen Combo for dogs must never be used on cats, ferrets or rabbits. Worm Screen Spot-on is cats only. Always check the packaging for minimum age and weight before use. If you're unsure which product suits your pet, or they have an existing health condition or are pregnant, speak to your vet or our pharmacy team.
Consider your pet's species (cat or dog), weight, and any specific parasitic concerns you might have. Pet Shield products are typically clearly labelled for their intended use. If you need assistance, our pharmacy team can offer general guidance, or you can consult your veterinarian for tailored advice.
It depends on the species. For cats, protection lasts 4 weeks against fleas and 2 weeks against ticks. For dogs, it lasts 8 weeks against fleas and 4 weeks against ticks. Both versions kill fleas within 24 hours and ticks within 48 hours, and stop flea eggs and larvae developing to help clear your home too.
Worm Screen tablets suit cats and dogs that will take a tablet directly or hidden in food. Worm Screen Spot-on is a cats-only alternative, applied to the skin at the base of the skull, for cats who are difficult to dose orally. Both treat roundworms, hookworms and tapeworms. If you're unsure which fits your cat, ask our pharmacy team.
Ensuring your pet's health is a priority, and with brands like Pet Shield, Weldricks Pharmacy is here to help you achieve that. We are committed to offering reliable and accessible pet care solutions, backed by our professional expertise and trusted service. For further advice on keeping your pets well, explore our Pet Pharmacy department or speak to one of our friendly pharmacists.
