SPL Set ID: bbbaa057-f587-4eb9-a0d2-463dbcd57661

Paliperidone extended-release tablets contain paliperidone, an atypical antipsychotic belonging to the chemical class of benzisoxazole derivatives. Paliperidone contains a racemic mixture of (+)- and (-)- paliperidone. The chemical name is (±)-3-[2-[4-(6-fluoro-1,2-benzisoxazol-3-yl)-1-piperidinyl]ethyl]-6,7,8,9-tetrahydro-9-hydroxy-2-methyl-4H-pyrido[1,2-a]pyrimidin-4-one. Its molecular formula is C 23 H 27 FN 4 O 3 and its molecular weight is 426.49. The structural formula is: Paliperidone is sparingly soluble in 0.1N HCl and methylene chloride; practically insoluble in water, 0.1N NaOH, and hexane; and slightly soluble in N,N-dimethylformamide. Paliperidone extended-release tablets are intended for oral administration and are available in 1.5 mg (orange-brown), 3 mg (white), 6 mg (beige), and 9 mg (pink) strengths. Paliperidone extended-release tablets utilize coated matrix drug-release technology . Inactive ingredients are butylated hydroxytoluene, carbomer homopolymer, colloidal silicon dioxide, dibutyl sebacate, ethyl cellulose, hypromellose phthalate, magnesium stearate, microcrystalline cellulose, polyethylene oxides, talc, titanium dioxide. The 1.5 mg and 6 mg tablets also contain ferric oxide yellow and ferric oxide red. The 9 mg tablets contain ferric oxide red. Delivery System Components and Performance Paliperidone extended-release tablets uses coated matrix formulation to deliver paliperidone at a controlled rate. The delivery system which resembles the round shape tablet in appearance consists of active in a core surrounded by a semipermeable membrane. The matrix core is composed of the drug, release controlling polymers and excipients. The semipermeable membrane surrounding the core consists of polymers. Each tablet strength has a different colorant and printing markings. In an aqueous environment, such as the gastrointestinal tract, aqueous fluid enters the tablets core through semipermeable membrane that controls the rate at which aqueous medium enters the tablet core, which in turn determine the lag of drug delivery. The hydrophilic polymers of the core hydrates, swells, creating a gel containing paliperidone which in turn determine the rate of drug delivery. structure