The present invention is directed to methods and compositions including a taxane covalently bonded to the cobalt atom of a cobalamin. The composition can be delivered by any effective route, but is particularly useful as an oral anti-cancer or anti angiogenic compound. The anti-cancer/anti-angiogenic compound can be used in various chemotherapies including anti-angiogenic chemotherapies, alone or in combination with other anti-cancer/anti-angiogenic compounds.
