Obagi CLENZIderm MD Pore Therapy Obagi CLENZIderm Pore Therapy dramatically minimizes blemishes on your skin while eliminating any unwanted residue. This uniquely formulated blend contains 2% Salicylic Acid. Salicylic Acid helps unclog pores and clear dead skin cells while preparing your skin to deeply absorb the liquefied serum that targets acne at its source. CLENZIderm M.D. is a revolutionary acne treatment regimen, clinically proven to provide visible evidence of acne reduction in as early as 2 weeks. For unrivaled results, CLENZIderm Daily Foaming Cleanser should be applied during your daily skincare regimen along with CLENZIderm M.D. Daily Care Foaming Cleanser and CLENZIderm M.D. Serum Gel.