Described are heat stable aqueous solutions or gels comprising a biologically
effective amount of a protein and an effective stabilizing amount of a polysaccharide
gum as well as heat stable solutions or gels suitable for use in an implantable
drug delivery device at body temperature. Also disclosed are lyophilized compositions
having biologically activity, where such lyophilized compositions are formed by
lyophilizing the stabilized solutions or gels of the invention.