How do I get rid of a rash caused by benzoyl peroxide?

I got it from using proactive.How do I get rid of a rash caused by benzoyl peroxide?
First, wash your face with a gentle cleanser, then dab a little Cortisone cream or Benadryl cream on the rash and it should calm the rash down.How do I get rid of a rash caused by benzoyl peroxide?
You are allergic to benzoyl peroxide, stop using it and use non-comedogenic soap and your face will be better soon!