The present invention relates to novel oral pharmaceutical compositions in lyophilized form, in which the dissolution and the bioavailability of the active ingredient that they contain are improved. The compositions according to the invention comprise in particular a polyvinyl acetate/polyvinylpyrrolidone copolymer. The oral lyophilisates according to the invention are particularly suitable for the production of medicaments based on active ingredients which have low solubility or very low solubility in water or which are virtually insoluble in water.
