simon12345 2 Posted March 16, 2014 So i got prescribed both Eryacne and Differin last week but the doctor didn't fully explain how and when to use it. The instructions on the Eryacne say twice a day, and Differin only at night. Just using the Eryacne and then Differin over the top of it at night seems like it might reduce the effects of the Eryacne. Thanks Quote Share this post Link to post Share on other sites
goodz19 43 Posted March 17, 2014 I would use the Eryacne in the morning and Differin alone in the evening. The instructions for Eryacne might assume you arent using any other products as part of your skin routine. Using too much too fast will cause irritation and may exasberate the proble, Quote Share this post Link to post Share on other sites
