Patent ID: 8709477

Claim:
A pharmaceutical dosage form exhibiting both immediate release and extend release properties comprising a therapeutically effective amount of active drug selected from methylphenidate and d-threo-methylphenidate comprising: a) a tablet core comprising a compressed mixture of coated sugar spheres and a blend of carboxvmethylcellulose, microcrystalline cellulose, magnesium stearate, silicon dioxide, and black iron oxide, said coated sugar spheres comprising i. an active drug layer comprising the active drug, hypromellose and talc; ii. a sustained release coating comprising ethylcellulose, hydroxypropyl cellulose, triethyl citrate, and talc; and iii. a controlled release enteric coating comprising hvpromellose acetate succinate; and b) an immediate release drug coat on said tablet core, said immediate release drug coat comprising active drug, hypromellose, polyethylene glycol, and talc.