ministration to human patients, wherein the pharmaceutical formulation comprises fulvestrant in solution, 10%weight ethanol per volume of formulation, 15 % weight of benzyl benzoate per volume of formulation and a sufficient amount of a ricinoleate vehicle so as to prepare a formulation of at least 45 mgml-1 of fulvestrant. 2. The use as claimed in claim 1, whereas the total amount of fulvestrant dissolved in the formulation is 250 mg and the total volume of the formulation is 5 ml. 3. The use as claimed in claims 1 or 2, whereas the formulation is present in a syringe