A pharmaceutical composition in form of an aqueous colloid or an aqueous suspension of particles up to a size of 100 µm comprises or consists of amphiphilic sulfonate or sulfate of a hydrophilic cancer drug having a solubility in water or aqueous body fluid of less than 0.1 % by weight. Also disclosed are the particles in powderous form, methods for their production and for the production of the colloid and the courser suspension, a method of treating liver cancer, in particular solid liver cancer tumours, by administration of the pharmaceutical composition, and a method of designing a composition according to the invention.
