Pharmaceutical compositions for oral administration, in particular administration as an oral delivery system to be swallowed directly or capable of disintegration in the oral cavity, comprising iron oxy-hydroxide in high loading.本發明關於一種口服投藥之藥學組成物,特別以一直接吞嚥或能夠在口腔中崩散的口服輸送系統投藥,其包含高裝載量之氧基-氫氧化鐵。