A regimen is described for the therapeutic treatment of rosacea including topically applying to the skin of a subject in need of the treatment a pharmaceutical composition. The pharmaceutical composition includes about 1% w/w to about 10% w/w benzoyl peroxide as an active ingredient, and a pharmaceutically acceptable carrier or excipient. The benzoyl peroxide is the only active ingredient in said pharmaceutical composition, and the pharmaceutical composition is applied once daily for a period of at least about 2 weeks, about 4 weeks, about 8 weeks or about 12 weeks. A decrease in Patient Assessment of Papulopustular Rosacea Signs and Symptoms (PAPSS) is at least about 40% after treatment with the pharmaceutical composition for about 4 weeks, and a decrease in Patient Assessment of Papulopustular Rosacea Impacts (PAPI) is from about 60% to about 70% after treatment with the pharmaceutical composition for at least about 8 weeks.
