Abstract: An orally administered liquid formulation, characterized by being obtained by blending a) vitamin B2 or an orally administrable sale thereof, b) an herbal-medicine-derived component, c) 1-10 parts by mass of polyvinyl pyrrolidone with respect to 1 part by mass (raw herbal medicine amount) of the herbal-medicine-derived component, and d) 0.02-1.6 parts by mass of at least one species selected from gallic acid and a derivative thereof with respect to 1 part by mass of vitamin B2. This orally administered liquid formulation has the excellent stability of a vitamin B2 species and does not precipitate in a liquid formulation, and can be applied in the fields of medicine and food products.