ForumsThe RegimenThe RegimenIm On Doxy 100Mg Ca... Notifications Clear all Unless you have severe, widespread, and scarring acne, The Regimen is normally my suggestion for the most effective acne treatment.My suggested acne treatment Learn The Regimen → Learn The Regimen → Im On Doxy 100Mg Can I Start The Regimen?paigekristina MemberMember0(@paigekristina) Posted : 10/08/2012 12:50 pm I have been on Doxycyline for over 5 months and my acne has gotten clearer but I still get cysts here and there...I was curious if I could buy the regimen and use it while on Doxycyline 100mg? Thank you. Quote C W 24 MemberMember29(@cw24) Posted : 10/08/2012 5:37 pm Yes, there is nothing wrong with taking a antibiotic and topicals at the same time. Quote