Each tablet contains lanthanum carbonate hydrate corresponding to 500 mg or 1000 mg lanthanum.
FOSRENOL (lanthanum carbonate hydrate) has been developed as a dietary phosphate-binding agent. Phosphate absorption from the gastrointestinal tract is effectively decreased by the formation of highly insoluble complexes that are largely unable to pass through the wall of the gastrointestinal tract and are eliminated by excretion.
La2(CO3)3.x H2O = 457.85 (anhydrous), on average x = 4.5 moles of water.
CAS Registry Number: 54451-24-0.
Excipients/Inactive Ingredients: The tablets also contain the excipients dextrates (hydrated), colloidal anhydrous silica and magnesium stearate.