"i have been on this medication for about 1 1/2 years now. at first, i had major acne. it was not regular acne. i had bumps/pimples all over my forehead. it was so atrocious and i have no clue how this appeared. my self-confidence was decreasing due to these bumps/pimples. anyhow, i went to my dermatologist and he prescribed minocycline. it takes 4 weeks, for best results. now about 1 1/2 years later, my acne(bumps) are coming back again."