"i&#039;ve been on doxycycline for 8 months. since i&#039;ve been on it, i haven&#039;t had any cystic acne or acne (only a few on occasion but they were very tiny &amp; went away quickly). no side effects for me. i have hormonal acne with rosacea. no cure for rosacea, but at least i don&#039;t have painful red bumps on my face anymore. me and my husband are amazed at the difference in my skin. give it a try!."