ForumsThe RegimenThe RegimenCan I do regimen on... 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 → Can I do regimen only at night?al 20 MemberMember0(@al20) Posted : 12/22/2018 8:35 am Can I do the regimen at night only and use Kiehls products in the morning with mederma for scars? will it affect the regimen in a bad way?Thanks Quoteklessard MemberMember46(@klessard) Posted : 12/24/2018 2:24 pm If it suggests twice a day, I would use twice a day (even if it is a pain in the butt). You'll get the best results that way. Quote