As with any medication, it takes some time for the body to completely eliminate a drug. A drug's half-life is the time it takes to eliminate half of the drug from the body. The half-life of CONVENIA is 6.9 days in cats and 5.5 days in dogs.3
After this time, the drug continues to decline in concentration and could exist in small amounts for up to 65 days.3
This does not mean that CONVENIA works for this long or, if there is a side effect, that the side effect will last that long. If you have any questions or concerns, please call Zoetis™ at 888-ZOETIS1 (888-963-8471).