What's the difference? My derm prescribed "5% Benzoyl
Peroxide Aqueous Solution". What is an aqueous solution? Is it made differently than OTC stuff? Any significant advantages? I find it hard to believe that prescription companies could make a profit off something that you can buy OTC for ~$3 in Wal-mart. There must be some difference. So what separates Benzac AC, Brevoxyl, ...