Just like people, some pets can be allergic to topical medication. If your pet has had an allergic reaction to the flea and tick treatment, you should stop using it. You can use water to try to dilute and wipe off some of the product. Don't forget to have a chat with your vet if you're concerned.
True allergic reactions to wormers are uncommon, thankfully! If side effects do occur though it's typically gastrointestinal upset that can cause things like hypersalivation, nausea, reduced appetite, vomiting, or diarrhoea. If you're worried that the wormer is making your pet feel poorly, we recommend contacting your vet to discuss options.
You can also report the veterinary medicine problem through the Gov.uk website. This helps monitor the use and safety of veterinary medicines.
Can my pet have an allergic reaction to the flea, tick and worm treatment?
