I haven't, yet my ENT brought it up 6 months after mine suddenly got worse offering to provide it for me. I declined. I had actually brought it up to my GP months earlier just a few weeks after the sudden worsening, and he said hell no because I was having bad insomnia. I heard it's best if taken a week or so after trauma. And some people have reported worsening, so I don't regret not taking it.