Tretinoin
"I have more acne as an adult then I had in my teenage years. I'm now 43 . Its all on the lower quarter of my face.. it is awful.  More like cystic acne. I can not take antibiotics for acne due to my health issues.  My dermatologist has tried it all. I find it very drying. And acne is not getting better. I've been on it a few months now and I've had it. I don't like anyone seeing me.  This isn't working for me. So disappointing"