Twice I've taken this drug - in 2011 and 2015. Both times I became a psycho. I simply wasn't me but the biggest pain on earth - antagonistic, extremely sad and depressed, with high stress, anxiety and fear as well as suspicion towards anyone around me. This was NOT fun. I put the 2 times I used it together after the second use in 2015 and realized it had to be this drug. I lost a few friends and frightened a few neighbors. I don't know how to explain this to anyone. I'm a very sane person otherwise. Am I just a very unique case, or are there others out there? I used it for post-op pain. Thank you,