Claims for Patent: 7,951,400

Summary for Patent: 7,951,400

Title:	Coated tablet formulation and method
Abstract:	A coated tablet formulation is provided which includes a medicament such as the DPP4-inhibitor, saxaglipitin ##STR00001## or its HCl salt, which is subject to intra-molecular cyclization, which formulation includes a tablet core containing one or more fillers, and other conventional excipients, which tablet core includes a coating thereon which may include two or more layers, at least one layer of which is an inner seal coat layer which is formed of one or more coating polymers, a second layer of which is formed of medicament which is the DPP4-inhibitor and one or more coating polymers, and an optional, but preferable third outer protective layer which is formed of one or more coating polymers. A method for forming the coated tablet is also provided.
Inventor(s):	Desai; Divyakant S. (West Windsor, NJ), Li; Bing V. (Germantown, MD)
Assignee:	Bristol-Myers Squibb Company (Princeton, NJ)
Application Number:	11/137,068
Patent Litigation and PTAB cases:	See patent lawsuits and PTAB cases for patent 7,951,400
Patent Claims:	1. A coated tablet comprising (a) a tablet core; (b) an inner seal coating layer coated on the tablet core wherein the inner seal coating layer comprises about 1 mg to about 100 mgs of a polyvinyl alcohol based formulation wherein the polyvinyl alcohol based formulation comprises polyvinyl alcohol; (c) a second coating layer coated on the inner seal coating of the tablet core, wherein the second coating layer comprises about 0.2 mgs to about 140 mgs of saxagliptin, or a pharmaceutically acceptable salt thereof, and about 2 mgs to about 140 mgs of a polyvinyl alcohol based formulation wherein the polyvinyl alcohol based formulation comprises polyvinyl alcohol; and (d) an outer protective coating layer coated on the second coating layer of the tablet core wherein the outer protective coating layer comprises about 1 mg to about 100 mgs of a polyvinyl alcohol based formulation wherein the polyvinyl alcohol based formulation comprises polyvinyl alcohol. 2. The coated tablet as defined in claim 1 wherein the tablet core is comprised of one or more fillers, optionally one or more binders, optionally one or more disintegrants and optionally one or more tableting lubricants. 3. The coated tablet as defined in claim 2 wherein the tablet core is comprised of microcrystalline cellulose, lactose monohydrate, croscarmellose sodium, and magnesium stearate. 4. The coated tablet as defined in claim 1 having the following composition: TABLE-US-00009 Range % by weight for Tablet Core 200 mg tablet core Lactose 20 to 75%/40 to 150 mg Microcrystalline cellulose 20 to 75%/40 to 150 mg Croscarmellose sodium 2 to 10%/4 to 20 mg Magnesium Stearate 0.2 to 2%/0.4 to 4 mg TABLE-US-00010 % by weight of 200 Inner Seal Coating Layer mg tablet core Polyvinyl Alcohol Based Formulation 1 to 3%/2 to 6 mg and optional plazticizer and glidants TABLE-US-00011 % by weight of 200 mg Second Coating Layer tablet core Polyvinyl Alcohol Based Formulation 0.25 to 70%/0.5 to 140 mg and optional plazticizer and glidants 1 to 50%/2 to 100 mg TABLE-US-00012 % by weight of 200 mg Outer Protective Coating Layer tablet core Polyvinyl Alcohol Based Formulation 1 to 5%/2 to 10 mg and optional plazticizer, glidants and color. 5. The coated tablet as defined in claim 1 where for a 5 mg potency the second coating layer is comprised of 5 mg saxagliptin, and at least 5 mg polyvinyl alcohol based formulation and for a 2.5 mg potency the second coating layer is comprised of 2.5 mg saxagliptin, and 20 mg polyvinyl alcohol based formulation. 6. A coated tablet comprising: a) a tablet core comprising about 49.5% lactose monohydrate, about 45% microcrystalline cellulose, about 5% croscarmellose sodium, and about 0.5% magnesium stearate; b) an inner seal coating layer coated on the tablet core, wherein the inner seal coating layer comprises about 40% polyvinyl alcohol, about 20% polyethylene glycol, about 15% talc, and about 25% titanium dioxide; c) a second coating layer coated on the inner seal coating of the tablet core, wherein the second coating layer comprises saxagliptin or a pharmaceutically acceptable salt thereof, polyvinyl alcohol, polyethylene glycol, talc, and titanium dioxide; and d) optionally an outer protective coating layer coated on the second coating layer of the tablet core, wherein the outer protective coating comprises polyvinyl alcohol, polyethylene glycol, talc, and titanium dioxide. 7. The coated tablet as defined in claim 6 wherein the second coating layer comprises saxagliptin or a pharmaceutically acceptable salt thereof, and a coating material comprising about 40% polyvinyl alcohol, about 20% polyethylene glycol, about 15% talc, and about 25% titanium dioxide. 8. The coated tablet as defined in claim 7 wherein the outer protective coating layer comprises about 40% polyvinyl alcohol, about 20% polyethylene glycol, about 15% talc, and about 25% titanium dioxide. 9. The coated tablet as defined in claim 8 wherein saxagliptin is the hydrochloride salt. 10. The coated tablet as defined in claim 1 wherein saxagliptin is the hydrochloride salt.