I once did. I had 25 mg pills, I could take 1 to 4, depending on how I felt. It mostly worked, but I did always fell sleepy afterwards -- but then, that's a frequent side effect for anything against anxiety. I also took a daily dose of 600 mg at the time, so I don't know if it will be comparable. Right now, I still have it, but it's mostly for sleep, as needed, and I never take more than 25 mg if I want to wake up reliably the next day.