Mild blackheads treatments take several weeks to months, before you can see a noticeable change.
Benzoyl Peroxide has an antibacterial effect, and may also decrease the chemical reaction, improving the hair follicle. This may help reduce comedones. Benzoyl peroxide may be used for mild comedones, or to help prevent formation of other comedones.
Tretinoin (Retin-A, Renova) is the mainly used to treat whiteheads and blackheads. Tretinoin is a derivative of vitamin A, it increases cell generation. It helps remove the plugged material, restoring the pores. Consult a dermatologist for instructions.