How does a phosphate binder work?

How does a phosphate binder work?

• A. It dissolves phosphorus in blood
• B. It binds phosphorus in the gut and eliminates via digestion
• C. It increases urinary excretion of phosphorus
• D. It converts phosphorus to phosphate

Answer: (C)

Phosphate binders work by binding dietary phosphate in the gut, forming an insoluble complex that is excreted in the stool. This prevents phosphate from being absorbed into the bloodstream, helping to lower serum phosphate levels in patients, especially those with kidney disease. They do not dissolve phosphorus in the blood, increase urinary excretion, or convert phosphorus to another form. For best effect, take the binder with meals as prescribed, and monitor phosphate (and calcium) levels and any GI side effects like constipation.

Phosphate binders work by binding dietary phosphate in the gut, forming an insoluble complex that is excreted in the stool. This prevents phosphate from being absorbed into the bloodstream, helping to lower serum phosphate levels in patients, especially those with kidney disease. They do not dissolve phosphorus in the blood, increase urinary excretion, or convert phosphorus to another form. For best effect, take the binder with meals as prescribed, and monitor phosphate (and calcium) levels and any GI side effects like constipation.