Benzoyl Peroxide for acne?

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Anyone with experience with benzoyl Peroxide for acne?

My GP prescribed for me a benzoyl peroxide (5%) + Erythromycin (3%) cream. She told me to apply it topically on pimples every night.

I basically have a night out to go in 6 days. I wanted to diminish my pimples as much as possible but my concern is that this will dry my skin and I won’t be able to apply makeup nicely.

What if I apply it and then have aloe vera gel masks to boost the healing process? Also will there be a visible improvement of my acne in 6 days? I don’t have that many pimples, maybe 5 on each cheek and 10 really really small ones on my forehead and chin.

I’d love to listen to your personal detailed experience:)