Dynacin and allergic reaction

I was on Dynacin for approximately 6 months when I started having severe joint pain. No doctor could figure out why. I was on medicines for rheumatoid arthritis with no effect. It got so bad that I could barely walk and could not even dress myself. Finally, about 4 months into my arthritis treatment, a resident in the emergency room where I was taken because my pain was so bad suggested that it may be an allergic reaction to the Dynacin. I discontinued use and 6 years later have had no more joint pain. I feel as though I should let anyone know about this possibility since it is not generally listed with the possible (even rare) side effects

Been taking minocycline (generic for Dynacin) for about 6 mos. Several months ago I noticed a purple-ish rash about 2 inches in diameter on my back. I had a biopsy and it was determined to be an allergic reaction to something. I believe it was from the minocyline. Also, it makes me dizzy & numbs my tongue. Besides these, it cleared my adult acne.