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Delivery of multiple doses of medications

DC
  • US 5,837,284 A
  • Filed: 07/14/1997
  • Issued: 11/17/1998
  • Est. Priority Date: 12/04/1995
  • Status: Expired due to Term
First Claim
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1. A dosage form for the oral administration of a methylphenidate drug, comprising two groups of particles, each containing said drug, wherein:

  • a) said first group of particles provides a substantially immediate dose of said drug upon ingestion by a mammal, andb) said second group of particles comprises coated particles, said coated particles comprising from about 2% to about 75% by weight of said drug in admixture with one or more binders, said coating comprising a pharmaceutically acceptable ammonio methacrylate in a quantity sufficient to provide a dose of said medication delayed by from about 2 hours to about 7 hours following said ingestion.

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