I have been on Differin forever, switching around with .1 and .3 depending on how my skin was reacting. I can now say it is just not doing the job to control my acne. I used RAM .1 last night for the first time. I am wondering if anyone has had success switching to Retin-a after not doing so well with Differin? Also, should I expect an IB since I have already been on Differin forever? I am hoping that will prevent a serious IB since retinoids aren't a new thing. I also never had one with Differin. Thanks for your help!