Details for Patent: 6,162,463

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Summary for Patent: 6,162,463

Title:	Extended release formulation of diltiazem hydrochloride
Abstract:	An extended release formulation of diltiazem which is suitable for once-daily oral administration comprises a quantity of a quick release preparation of diltiazem or a pharmaceutically active salt thereof, mixed with a quantity of a slow release (or delayed release) preparation of diltiazem or a pharmaceutically active salt thereof. The quick release preparation used obtains a maximal release of diltiazem within approximately 1-2 hours after administration, and then falls toward baseline levels. The delayed release preparation individually shows a maximal release of diltiazem at between approximately 6-8 hours after administration. The formulation containing the two preparation achieves a maximal release of diltiazem approximately within 1-2 hours after administration, and the levels of released diltiazem remain near these maximal levels for approximately another 12 hours after administration, compared to other extended release formulations of diltiazem (referred to herein as slow or delayed release preparations) which achieve maximal release approximately 9 hours after oral administration. The preferred embodiment is a capsule containing the formulation, which, based upon the total quantity of drug in the formulation rather than total weight of the formulation, comprises up to approximately 25 percent by weight of the quick release preparation of diltiazem, and up to 75 percent by weight of the slow (or delayed) release preparation of diltiazem. The present invention has application for combinations of other preparations of quick release and slow or delayed release pharmaceuticals.
Inventor(s):	Lippa; Arnold S. (Hackensack, NJ)
Assignee:
Application Number:	09/067,573
Patent Claim Types: see list of patent claims	Formulation; Compound; Dosage form; Use;

Drugs Protected by US Patent 6,162,463

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Applicant	Tradename	Generic Name	Dosage	NDA	Approval Date	TE	Type	RLD	RS	Patent No.	Patent Expiration	Product	Substance	Delist Req.	Patented / Exclusive Use	Submissiondate
>Applicant	>Tradename	>Generic Name	>Dosage	>NDA	>Approval Date	>TE	>Type	>RLD	>RS	>Patent No.	>Patent Expiration	>Product	>Substance	>Delist Req.	>Patented / Exclusive Use	>Submissiondate

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European Patent Office	0953350	⤷ Sign Up
Japan	2000026278	⤷ Sign Up
>Country	>Patent Number	>Estimated Expiration	>Supplementary Protection Certificate	>SPC Country	>SPC Expiration

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