Pharmaceutical preparations in the form of foams for use in sclerotherapy treatment of veins; pharmaceutical preparations in the form of foams for use in producing foams for use in sclerotherapy treatment of veins; pharmaceutical preparations in the form of foams or for use in preparing foams, for sclerotherapy, phlebology, angiology and proctology, for treatment of oesophageal varices, hydroceles, in sterilisation treatment or for treatment of varicose veins, or arterio-venous malformations;...