1. Medical adsorbent containing granular activated carbon, which is activated carbon obtained by carbonization and activation of refined cellulose or regenerated cellulose, and which has an average pore diameter of from 1.5 to 2.2 nm, specific surface area according to the BET method from 700 up to 3000 m / g, an average particle size of 100 to 1100 μm, an oxide content on the surface of 0.05 mEq / g or more, and a packing density of 0.4 to 0.8 g / ml. 2. The medical adsorbent according to claim 1, wherein the granular activated carbon is a therapeutic or prophylactic agent for oral administration in kidney disease or liver disease. A method for producing a medical adsorbent in which, in the production of granular activated carbon according to claim 1, refined cellulose or regenerated cellulose is carbonized at a temperature of from 300 ° C to 700 ° C in a nitrogen atmosphere, and then steam activated at a temperature of from 750 ° C to 1000 ° C, acid cleaning and heat treatment at temperatures from 500 ° C to 800 ° C. 4. A method of producing a medical adsorbent in which, in the production of granular activated carbon according to claim 1, refined cellulose or regenerated cellulose is impregnated with ammonium phosphate or metal phosphate, carbonized at a temperature of from 300 ° C to 700 ° C in a nitrogen atmosphere, and then subjected to steam activation at temperatures from 750 ° C to 1000 ° C, acid cleaning and heat treatment at temperatures from 500 ° C to 800 ° C.1. Медицинский адсорбент, содержащий гранулированный активированный уголь, который является активированным углем, полученным при карбонизации и активации рафинированной целлюлозы или регенерированной целлюлозы, и который обладает средним диаметром пор от 1,5 до 2,2 нм, удельной площадью поверхности по методу ВЕТ от 700 до 3000 м/г, средним размером частиц от 100 до 1100 мкм, содержанием оксида на поверхности 0,05 мг-экв/г или больше, и плотностью упаковки от 0,4 до 0,8 г/мл.2. Медицинский адсорбент
