doxy, mino, tetra, mainly the same thing each one works slightly different on each person.I started on tet, then got put on doxy then mino. No sides until i came off and got the flue then strep and all sorts of shit cause my imune system was dependant on anti b's . now when ever i have a flareup of body acne my dermatologist puts me on prednisone for 4 days and it dissaperes instantly.(He calls me out on aas every time). Prednisone is a cordico steriod. I know you knew that but thought it would be good info for the thread.