1. A method of treating a subject suffering from a kidney disease,consisting of administering an effective amount of a composition to the subject,
wherein the composition consists of (a) cyclo histidine-proline (CHP) or its pharmaceutically acceptable salt as an active ingredient, and (b) one or more additives selected from the group consisting of sodium starch glycolate, crospovidone, croscarmellose sodium, alginic acid, carboxymethylcellulose calcium, carboxymethylcellulose sodium, chitosan, guar gum, low-substituted hydroxypropylcellulose, magnesium aluminum silicate, polacrilin potassium, starch, gelatinized starch, microcrystalline cellulose, lactose, povidone, colloidal silicon dioxide, calcium hydrogen phosphate, mannitol, sugar, arabic gum, pregelatinized starch, corn starch, powdered cellulose, hydroxypropylcellulose, opadry, sodium starch glycolate, carnauba lead, synthetic aluminum silicate, stearic acid, magnesium stearate, aluminum stearate, calcium stearate, white sugar, dextrose, sorbitol, and talc,
wherein the administering the composition suppresses apoptosis of kidney cells, and
wherein the kidney disease is selected from the group consisting of chronic pyelonephritis, nephrotic syndrome, nephrogenic diabetes insipidus, and hyperuricemia.