SPL Set ID: b1b7def0-834f-37f5-e053-2a95a90ade1f

The active ingredient in rabeprazole sodium delayed-release tablets is rabeprazole sodium, which is a proton pump inhibitor. It is a substituted benzimidazole known chemically as 2-[[[4-(3-methoxypropoxy)-3-methyl-2-pyridinyl]-methyl]sulfinyl]-1H–benzimidazole sodium salt. It has a molecular formula of C18H20N3NaO3S and a molecular weight of 381.42. Rabeprazole sodium is a white to off-white, hygroscopic powder. It is freely soluble in methanol and methylene chloride. The stability of rabeprazole sodium is a function of pH; it is rapidly degraded in acid media, and is more stable under alkaline conditions. The structural formula is: Figure 1 [Chemical Structure] Rabeprazole sodium is available for oral administration as delayed-release, enteric-coated tablets containing 20 mg of rabeprazole sodium USP. Inactive ingredients of the 20 mg tablet are crospovidone, diacetylated monoglycerides, ethyl cellulose, ferric oxide yellow, hydroxypropyl cellulose, hypromellose phthalate, low substituted hydroxypropyl cellulose, magnesium stearate, mannitol, magnesium oxide, magnesium hydroxide, sodium carbonate, talc, and titanium dioxide. The tablets are printed with edible ink containing black iron oxide and shellac.