Comfortis Chewable Tablets for Cats are a meat flavoured tablet that rapidly kills fleas on cats and then goes on to prevent flea infestations for a further month. Comfortis starts to kill fleas within 30 minutes of administration and will kill 100% of fleas on a cat within 24 hours. The chewable meat flavoured tablet can be administered orally or mixed with food. As the product is an oral medication there are no restrictions with regards to washing after treatment. Comfortis for cats comes in 3 convenient sizes for cats between 4.1 and 24 lbs in weight.