I had an injection of Kenalog-10 mixed with Lidocaine (about 5mg) in my chin area for an overfilled ArteFill injection. How long does Kenalog take to work? And, how long does Kenalog stay in one's system? This was a very small dose so I am thinking I might need another. I would love to hear anyone else who had a Kenalog injection in their face with positive results. If so, how many did you need?