<unk>  is a drug used to treat hypercalcemia and hypercalciuria. It has been used to prevent kidney stones.
This compound is an ion-exchange resin that can not be absorbed by the body. However, it can be used to restore the normal intestinal calcium absorption. When it is taken orally, it binds strongly to calcium and inhibits its absorption into the blood. From there, inhibition is caused due to the lower intraluminal calcium levels, which is typically available for absorption. 
The mechanism of action of the drug compound can cause a couple of internal effects. Due to the binding activity of the compound with calcium, it will also bind with magnesium and cause a depletion in the body. Working off of this effect,<unk>  will bind with divalent intestinal cations. Because of this binding, more oxalate is available in the blood. This high level of oxalate within the intestine can also be a source of renal stones.
Sodium cellulose phosphate
Calcium oxalate
Chondroitin sulfate
Phosphonic acid
Aluminium phosphate
Oxidized cellulose
Calcium silicate
Calcium phosphate