The main active ingredient of this preparation is 12% salicylic acid and 4% lactic acid
Salicylic acid belongs to the group of medicines known as keratolytics. Salicylic acid works by breaking down keratin, a protein which forms part of the skin structure. This results in the shedding of skin cells from the affected area.
In the treatment of warts, calluses and verrucas, the effect of salicylic acid is to remove the affected skin over a period of time. If successful, the new skin which grows underneath will be healthy.