Mechanism of Action
These agents work by binding to phosphate in the GI tract, thereby making it unavailable to the body for absorption. Hence, these drugs are usually taken with meals to bind any phosphate that may be present in the ingested food. Phosphate binders may be simple molecular entities (such as aluminium, calcium, or lanthanum salts) that react with phosphate and form an insoluble compound. Phosphate binders, such as sevelamer, may also be polymeric structures which bind to phosphate and are then excreted.
Read more about this topic: Phosphate Binders
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