Active substances
Medicines for dogs and cats
Here we explain the active substances in medicines for dogs and cats. Each substance has its own detailed page, covering all forms and both dogs and cats in one place. The information is based on official product information.
Active substances
1 active substance
No active substance found. New substances are added regularly.
What each substance page covers
- What the substance is used for in dogs and cats
- How it works and how quickly
- When it must not be used and what to know before treatment
- Possible side effects and when to contact a vet straight away
- Interactions with other medicines, pregnancy and lactation
- Safety for people, storage and disposal
- Sources: official product information
We never give doses. Your vet sets the dose, and it is printed on the package leaflet.
Giving medicines to dogs and cats safely
- Only give medicines that your vet has prescribed or that are authorised for that species. Many medicines for dogs are dangerous to cats.
- Medicines for people, such as some painkillers, can be poisonous to dogs and cats. Never give them unless your vet tells you to.
- Follow your vet's instructions and the package leaflet for the whole course of treatment, even if your pet seems better sooner.
- Tell your vet about every medicine and supplement your pet already takes, so that dangerous interactions can be avoided.
- Keep medicines out of reach of children and animals. Flavoured tablets can tempt a dog to eat the whole pack.
- Suspected side effects can be reported to the Veterinary Medicines Directorate (VMD), either through your vet or directly on GOV.UK.
- Do not flush leftover medicines down the toilet or sink. Take them back to a pharmacy or your vet practice.
Frequently asked questions
Why don't you give doses?
The dose depends on your pet's weight, species and condition, and the wrong dose can be dangerous. Your vet will give you the dose, and it is also in the package leaflet.
Where does the information come from?
The pages are based on official product information (Summaries of Product Characteristics) published by veterinary medicines regulators. The sources are listed at the end of each page.
Can I give my pet human medicines?
Not unless your vet tells you to. Some medicines for people are poisonous to dogs and cats.
Do you sell or recommend medicines?
No. We do not sell medicines and we do not recommend one product over another. Your vet chooses the medicine.
This information does not replace a visit to the vet. In an emergency, contact your vet or an out-of-hours emergency vet. Think your pet may have been poisoned? Is it poisonous?