A safe medical agent which is low in contamination by a pulverizing medium, while having improved bioavailability. A method for producing a composite organic compound powder for medical use, which comprises a step of mixing a poorly water-soluble crystalline organic compound powder, a physiologically acceptable salt, a physiologically acceptable polyol and a carboxyvinyl polymer and pulverizing the organic compound powder, and a step of removing at least the salt and the polyol during or after the pulverization.
