ForumsThe RegimenThe RegimenIm On Doxy 100Mg Ca... Notifications Clear all 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