The injections must be heparin (clexane or fragmin) as warfarin is tablets. It is true that kings haematologists also can only prescribe a couple of weeks worth and gp then takes it over. The hospital sends a letter specifying what is needed. The injectable blood thinners do, in due course, get replaced by warfarin which is much cheaper but requires more monitoring (blood tests weekly for eg) I think the best thing to do is to call the hospital and get the consultants secretary, ensure a letter has been sent to the gp and get a copy then arrange an urgent gp appt. in the meantime, if she has been missing daily injections which are life-saving, sounds as if the hospital perhaps should check her over and prescribe again as a stop gap, if the gp isn't getting things sorted.