We’re tough on ticks and fleas. And even tougher on ourselves.

Elanco takes the safety of our products very seriously, and the health of your dog is always our top priority. As with all Elanco brands, Credelio® (lotilaner) has been rigorously tested and approved by the FDA and other regulatory authorities around the world.


There are no known contraindications for the use of Credelio.

Side effects

The few side effects reported for Credelio include:

  • Weight loss
  • Elevated blood urea nitrogen (BUN)
  • Increased urination
  • Diarrhea

View the Credelio product label for more safety information.