SPL Set ID: 9977f652-b3e7-43bc-bf3f-1f54698c5f7a

The active ingredient in sevelamer carbonate tablet is sevelamer carbonate, a polymeric amine that binds phosphate and is meant for oral administration. It was developed as a pharmaceutical alternative to sevelamer hydrochloride. Sevelamer carbonate is an anion exchange resin, with the same polymeric structure as sevelamer hydrochloride, in which carbonate replaces chloride as the counterion. While the counterions differ for the two salts, the polymer itself, the active moiety involved in phosphate-binding, is the same. Sevelamer carbonate is known chemically as poly(allylamine- co -N,N′-diallyl-1,3­-diamino-2-hydroxypropane) carbonate salt. Sevelamer carbonate is hygroscopic, but insoluble in water. The structure is represented in Figure 1. Figure 1: Chemical Structure of Sevelamer Carbonate a, b = number of primary amine groups a + b = 9 c = number of cross-linking groups c = 1 m = large number to indicate extended polymer network Sevelamer Tablets: Each film-coated sevelamer carbonate tablet contains 800 mg of sevelamer carbonate on an anhydrous basis. The inactive ingredients are diacetylated monoglycerides, hypromellose, microcrystalline cellulose, polyethylene glycol 4000, titanium dioxide and zinc stearate. Imprinting ink contains ferrosoferric oxide and shellac. structure