Abstract: Gallium(III) complexes of general formula I, ##STR1## in which X=O.sub.2 CR.sup.2, halogen, NO.sub.3 or -OA, R.sup.1 =H, alkyl, alkoxy, halogen, NO.sub.2 or amino, R.sup.2 =alkyl, alkoxy or aryl, each of R.sup.3, R.sup.4, R.sup.5 and R.sup.6 =H or alkyl and n=0, 1 or 2, or when n=0 and R.sup.3 and R.sup.6 both=H, then R.sup.4 and R.sup.5 together may form tetramethylene, and A=an identical gallium complex moiety to that to which the oxygen atom is linked, are well absorbed orally, and are indicated as medicaments for hypercalcemia and for cancer chemotherapy.

Abstract: The present invention relates to compounds of gallium (III) which can be given orally to achieve high serum levels of gallium (III) for the treatment of hypercalcemia of malignancy and related disorders of bone metabolism. Complexes of gallium (III) of the formula (I) ##STR1## wherein R.sub.1 is C.sub.1 -C.sub.8 n-alkyl and R.sub.2 is H or C.sub.1 -C.sub.2 alkyl, or R.sub.1 and R.sub.2 together form tetra- or penta-methylene and wherein said complex is useful in increasing calcium content of bone tissue and decreasing bone resorption, are used in an amount sufficient to cause an increase in calcium content of said bone and to cause decreased bone resorption.