The invention relates to a pharmaceutical composition of sunitinib or its salt thereof in its polymorphic form I allowing for preparation of all proportional doses of sunitinib composition for administration to a patient comprising diluent, disintegrant, binder, lubricant wherein the composition comprises a macromolecular polymer - hypromellose (HPMC) in amount of 1-5% by weight of the total weight of the composition.The invention also relates to a method of producing pharmaceutical composition of sunitinib or its salt.