Doxycycline
"I've been prescribed to take this medicine twice a day for 15 days and have really bad cystic acne. I'm about a week in and I think I'm in the purging period. All of the deep cysts in my face are becoming nodules!! I hope this goes away fast. I suggest not using many other products with this as it makes your skin super sensitive and I've been having a really red face if I use anything too harsh."