About 1 yr ago I was put on Minocycline by my Dermatologist for mild acne. I took it every day for about 4 months and it did help with my acne BUT..... I then started having severe instances of dizziness, nausea, blurred vision, and nausea. It got so bad I had to pull off the side of the road one day because i was to dizzy to drive. My primary physician did not know what was wrong with thought maybe I was pregnant (I was 28 at the time). I was not pregnant so he sent me to a neurologist. I had to have an MRI (which was normal) so the neurologist said he believed the minocycline was causing me to produce an increased amount of spinal fluid!! I had to have a SPINAL TAP and when they saw how high my spinal fluid pressure was i had to have some drained. It was scary and painful but the symptoms went away almost right away. I believe this med is dangerous if taken for an extended period. BE AWARE of what your body is telling you!!! I can no longer take any tetracyclines.