Just curious- I've heard various topical products should not be used together for a variety of reasons... usually due to increased irritation. Fortunately, I haven't experienced irritation using both the Aczone & Retin-A nightly as prescribed, but I was wondering if there are any interactions between the two. Could one possibly decrease the potency of the other (similar to how AHA/BHA can reduce the effectiveness of tretinoin if used together) ? Thanks in advance, & take care!