SORVATE contains Calcipotriol which belongs to a group of medicines called anti-psoriatics. It is used to treat topical treatment of plaque psoriasis. It is a type of vitamin D which controls how the cells in your skin grow. Psoriasis is a condition where skin develops raised red patches and silver coloured scaly patches. These scaly patches are dead cells that would normally fall off your skin without you noticing. It works by reducing the amount of cells your skin makes which reduces the skin symptoms.