SPL Set ID: 7f701cb4-3089-375f-e053-2991aa0a51b9

The active ingredient in sevelamer carbonate tablets 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 (Renagel ® ). 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 crosslinking groups c = 1 m = large number to indicate extended polymer network Sevelamer carbonate tablets: Each film-coated tablet of sevelamer carbonate contains 800 mg of sevelamer carbonate on an anhydrous basis. The inactive ingredients are diacetylated monoglycerides, hypromellose, microcrystalline cellulose, silicon dioxide and zinc stearate. Imprinting ink contains ammonium hydroxide, iron oxide black, propylene glycol and shellac. structure