SPL Set ID: 7124df7e-6273-a68d-6e35-dc06122d8686

Methylphenidate hydrochloride extended-release tablet is a central nervous system (CNS) stimulant. Methylphenidate hydrochloride extended-release tablets are available in four strengths. Each extended-release tablet for once-a-day oral administration contains 18, 27, 36, or 54 mg of methylphenidate HCl USP and is designed to have a 12-hour duration of effect. Chemically, methylphenidate HCl is d,l (racemic) methyl α-phenyl-2-piperidineacetate hydrochloride. Its empirical formula is C 14 H 19 NO 2 •HCl. Its structural formula is: Methylphenidate HCl, USP is a white to off-white fine crystalline powder. Its solutions are acid to litmus. It is freely soluble in water and in methanol, soluble in alcohol, and slightly soluble in chloroform and in acetone. Its molecular weight is 269.77. Methylphenidate hydrochloride extended-release tablets also contains the following inert ingredients: butylated hydroxytoluene, cellulose acetate, colloidal silicon dioxide, FD&C Blue #1/Brilliant Blue FCF Aluminum Lake, FD&C Red #40/Allura Red AC Aluminum Lake, hypromellose, phosphoric acid, poloxamer, polyethylene oxide, povidone, sodium chloride, stearic acid, succinic acid. In addition 18 mg contains Opadry Purple (FD&C Blue #2/Indigo Carmine Aluminum Lake, FD&C Red #40/Allura Red AC Aluminum Lake, hypromellose 3 mPas, hypromellose 6 mPas, polyethylene glycol, polysorbate, titanium dioxide), 27 mg contains Opadry Pink (D&C Red #27/Phloxine Aluminum Lake, FD&C Blue #2/Indigo Carmine Aluminum Lake, hypromellose 3 mPas, hypromellose 6 mPas, polyethylene glycol, polysorbate, titanium dioxide), 36 mg contains Opadry Orange (FD&C Red #40/Allura Red AC Aluminum Lake, FD&C Yellow #6/Sunset Yellow FCF Aluminum Lake, hypromellose 3 mPas, hypromellose 6 mPas, polyethylene glycol, polysorbate, titanium dioxide), 54 mg contains Opadry Blue (FD&C Blue #2/Indigo Carmine Aluminum Lake, hypromellose 3 mPas, hypromellose 6 mPas, polyethylene glycol, polysorbate, titanium dioxide). Opacode Black contains black iron oxide, hypromellose 6 mPas, propylene glycol. "Meets USP Dissolution Test 12" 11.1 System Components and Performance Methylphenidate hydrochloride extended-release tablets uses osmotic pressure to deliver methylphenidate HCl at a controlled rate. The system, which resembles a conventional tablet in appearance, comprises an osmotically active trilayer core surrounded by a semipermeable membrane with an immediate-release drug overcoat. The trilayer core is composed of two drug layers containing the drug and excipients, and a push layer containing osmotically active components. There is a precision-laser drilled orifice on the drug-layer end of the tablet. In an aqueous environment, such as the gastrointestinal tract, the drug overcoat dissolves within one hour, providing an initial dose of methylphenidate. Water permeates through the membrane into the tablet core. As the osmotically active polymer excipients expand, methylphenidate is released through the orifice. The membrane controls the rate at which water enters the tablet core, which in turn controls drug delivery. Furthermore, the drug release rate from the system increases with time over a period of 6 to 7 hours due to the drug-concentration gradient incorporated into the two drug layers of methylphenidate hydrochloride extended-release tablets. The biologically inert components of the tablet remain intact during gastrointestinal transit and are eliminated in the stool as a tablet shell along with insoluble core components. It is possible that methylphenidate hydrochloride extended-release tablets may be visible on abdominal x-rays under certain circumstances, especially when digital enhancing techniques are utilized. “FDA approved dissolution test specifications differ from USP”.