I was on Doxy for a month and a half due to mild acne. For the first month, I felt fine, however when I went to refill, things became awful. Although I did not notice the nausea or tiredness (because I took it before going to bed), I began to feel episodes of dizziness, confusion, inability to concentrate, and anxiety. I continued taking it because I had not been informed that these might be side effects. Eventually I had 2 panic attacks where my legs shook uncontrollably, I felt I could not breath, became really cold and sweaty, had racing thoughts that I might die, and felt incredibly confused. The attacks really scared me to the point where I was afraid of having another one. When I went to the doctor, they ran blood tests, told me everything was alright, diagnosed me with panic disorder, and gave me medication. Even though I told them I was taking this medication, no one ever told me this might be side effects. I have never had any mental problems and am an upbeat, happy person. While taking this, I had severe anxiety and bouts of depression where I felt like crying for no reason. I was afraid to be alone, I was afraid to workout, and afraid to leave the house. I could not study and thought my entire life was spinning out of control. I've been off it for 2 days and am feeling much better. Anxiety has decreased and depressive episodes are also decreasing. There should be better research on these drugs to inform consumers!