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Sevelamer
Sevelamer (rINN) ( or ) is a phosphate binding drug used to treat hyperphosphatemia in patients with chronic kidney disease. When taken with meals, it binds to dietary phosphate and prevents its absorption. Sevelamer was invented and developed by GelTex Pharmaceuticals. Sevelamer is currently marketed by Sanofi under the trade names Renagel (sevelamer hydrochloride) and Renvela (sevelamer carbonate). ==Chemistry and pharmacology== Sevelamer consists of polyallylamine that is crosslinked with epichlorohydrin.〔(1) Rosenbaum, D. P.; Mandeville, W. H.; Pitruzzello, M.; Goldberg, D. I. Nephrology Dialysis Transplantation Effect of RenaGel A , a Non-Absorbable , Cross-Linked , Polymeric Phosphate Binder , on Urinary Phosphorus Excretion in Rats. 1997, 961–964.〕 The marketed form sevelamer hydrochloride is a partial hydrochloride salt being present as approximately 40% amine hydrochloride and 60% sevelamer base. The amine groups of sevelamer become partially protonated in the intestine and interact with phosphate ions through ionic and hydrogen bonding.
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