Ketasma Tablet is an antiallergic medicine used in the treatment of allergies. It contains Ketotifen, which is an antiallergic medicine. It works by blocking the effects of a chemical messenger called ‘histamine. This chemical messenger is naturally involved in allergic reactions. Ketotifen helps to relieve discomfort and unpleasant symptoms like blocked/runny/itchy nose, red/watery eyes, and skin rashes due to allergic conditions.