Ketof 1 mg Tablet contains Ketotifen Fumarate, a non-bronchodilator antiasthmatic agent with antihistaminic and mast cell stabilizing properties. It is primarily used for the prophylactic treatment of bronchial asthma and symptomatic relief of allergic conditions such as rhinitis and conjunctivitis. Ketotifen works by inhibiting the release of mediators from mast cells and blocking histamine receptors, thereby reducing the frequency and severity of asthma attacks and allergic reactions.