There are described compounds of the formula I ##STR1## in which R.sup.1 is (C.sub.1 -C.sub.10)-alkyl, (C.sub.1 -C.sub.8)-alkanoyl, (C.sub.6 -C.sub.10)-aryl or Het, each of which can be substituted by halogen, --OH, --NH.sub.2, --NH--CO--R.sup.7, --O--CO--R.sup.7 and --N--(R.sup.8).sub.2 where R.sup.7 =(C.sub.1 -C.sub.6)-alkyl and R.sup.8, independently of one another, is hydrogen or (C.sub.1 -C.sub.2)-alkyl or in which R.sup.1 is the radical of the formula II ##STR2## in which n is an integer from 3 to 10, m is zero to 3, R.sup.6, independently of one another, is (C.sub.1 -C.sub.6)-alkyl which is optionally substituted by halogen or --NH--CO--R.sup.7, where R.sup.7 =(C.sub.1 -C.sub.6)-alkyl, and X is absent or is (C.sub.1 -C.sub.10)-alkyl, and R.sup.2, R.sup.3, R.sup.4 or R.sup.5, independently of one another, are hydrogen, (C.sub.1 -C.sub.5) -alkyl, lithium, sodium, potassium or Si(R), where R=(C.sub.1 -C.sub.5)-alkyl, and their physiologically tolerable salts, a process for preparation of these compounds of the formula I and their use as pharmaceuticals in the prophylaxis and treatment of osteoporosis and hypercalcemia.

Hoechst Aktiengesellschaft

Imidobisphosphoric acids, and use thereof

The present invention relates to novel calcium-containing microporous zirconium silicate compositions that are formulated to remove toxins, e.g. potassium ions, from the gastrointestinal tract at an elevated rate without removing calcium from the patient's body. Also disclosed are methods of using calcium-free or low calcium microporous zirconium silicate compositions for the treatment of hyperkalemia in patients also suffering from hypercalcemia.

ZS Pharma, Inc.

ZS PHARMA, INC.

Microporous zirconium silicate for the treatment of hyperkalemia in hypercalcemic patients and improved calcium-containing compositions for the treatment of hyperkalemia

hypercalcemia/پتاسیم

Imidobisphosphoric acids, and use thereof

Microporous zirconium silicate for the treatment of hyperkalemia in hypercalcemic patients and improved calcium-containing compositions for the treatment of hyperkalemia

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