SPL Set ID: 3261e8cf-cc6e-4011-9246-aee623ad8971

Risperidone is an atypical antipsychotic belonging to the chemical class of benzisoxazole derivatives. The chemical designation is 3-[2-[4-(6-fluoro-1,2-benzisoxazol-3-yl)-1-piperidinyl]ethyl]-6,7,8,9-tetrahydro-2-methyl-4H-pyrido[1,2-a]pyrimidin-4-one. Its molecular formula is C 23 H 27 FN 4 O 2 and its molecular weight is 410.49. The structural formula is: Risperidone is a white to slightly beige powder. It is practically insoluble in water, freely soluble in methylene chloride, and soluble in methanol and 0.1 N HCl. Risperidone Tablets, USP, are for oral administration and available in 0.25 mg (dark yellow), 0.5 mg (red brown), 1 mg (white), 2 mg (red), 3 mg (yellow), and 4 mg (white) strengths. Risperidone tablets contain the following inactive ingredients: colloidal silicon dioxide, corn starch, lactose monohydrate, magnesium stearate, microcrystalline cellulose, and tartaric acid. The 0.25 mg tablets also contain Opadry II yellow 85F12383, for purposes of coating, which contains the following: iron oxide yellow, polyethylene glycol 3350, polyvinyl alcohol, talc, and titanium dioxide. The 0.5 mg tablets also contain Opadry II red 85F15362, for purposes of coating, which contains the following: iron oxide red, polyethylene glycol 3350, polyvinyl alcohol, talc, and titanium dioxide. The 1 mg and 4 mg tablets also contain Opadry II white 85F18422, for purposes of coating, which contains the following: polyethylene glycol 3350, polyvinyl alcohol, talc, and titanium dioxide. The 2 mg tablets also contain Opadry II red 85F650032, for purposes of coating, which contains the following: calcium carbonate, iron oxide red, iron oxide yellow, polyethylene glycol 3350, polyvinyl alcohol, and talc. The 3 mg tablets also contain Opadry II yellow 03B12447, for purposes of coating, which contains the following: hypromellose 2910 6cP, iron oxide red, iron oxide yellow, polyethylene glycol 400, and titanium dioxide. Chemical Structure