In my opinion, there is really nothing comparable to Paulas Choice products (especially the BHAs) in the drugstore.
Most drugstore items contain irritants such as fragrance and colorants, which can make you break out even more. Paulas Choice products are very carefully formulated to avoid all of these irritants, and to be at the most effective pH level.
I would love to just pick stuff up at the drugstore too, but I think it's worth it to wait for shipping and have clear skin!!