Aspirin - see also Human medicines
Asprin is a drug normally given to humans for the treatment of pain. Although a lot of drugs used today in human have been tested and are licensed for use in our animals, there are still a lot of drugs that can be harmful if we use them in our cats. Aspirin, even if given in small doses can prove fatal in our cats. Keep all drugs bought or prescribed for human use away from your cats. Only give medication under the direction of your veterinary surgeon.

Clinical Signs
Vomiting, not eating, dull, incoordination, convulsions.