The invention relates to a film coated tablet comprising the following constituents: a) at least 50 % by weight of a dried extract of red vine leaves, which is obtainable by extraction of red vine leaves with water and drying； b) up to 50 % by weight of an excipient consisting essentially of at least one binder, at least one disintegrant, at least one filler, and a lubricant； and c) a tablet film consisting essentially of a film former, a plastiziser, a coating agent and optionally a coloring agent.Furthermore, the invention relates to an aqueous extract of red vine leaves is obtainable by a method comprising the steps of: a) collecting red vine leaves at a point of time when the content in flavonoids has reached an optimum； b) drying and crushing the leaves； c) cutting the leaves to pieces； d) extracting the leaves with water at elevated temperatures for 6 to 10 hours； e) concentrating and drying the obtained extract, andaddition of up to 10 % by weight of a flow regulator during the relating to the final total amount of the resulting extract during the drying process (e).
