I say empathic.
Is it my imagination, or do clinicians say empathic while people outside our field almost always say empathetic? I would be surprised to hear one of my psychology colleagues use the word empathetic. In fact, I'm so accustomed to the word empathic, that I automatically take notice when someone uses the word empathetic. I can't help it; I always notice.
Both are real words and they have the same meaning.