It's best not to use any other soaps with acne medications in them while on prescriptions. I'm not sure why, but I wouldn't do it if I were you. Use a mild soap like Dove.
i wouldn't. i tried retin a micro for a few days and swore it off permanently. it's no good for the sensitive part of my combo skin. i looked worse than ever after 3 or 4 days of it. it dried my upperlip, cheeks and chin like a *****. peeling and red and hurting, very very bad for me. took a couple weeks to recover.