ctive ingredient with 4 to 8% by weight of a hydrophobic substance of great specific surface, 7 to 12% by weight of a lipoid, 8 to 12% by weight of a polyoxy compound, 4 to 9% by weight of a binding material, 0.5-4% by weight of an acidic stabilizer and if desired with filling agents, diluents, lubricants and other excipients, and preparing tablets or dragees suitable for oral administration.