CA2991217A1 — Encased tamper resistant controlled release dosage forms
Assigned to Purdue Pharma LP · Expires 2012-06-28 · 14y expired
What this patent protects
In certain embodiments, the present invention is directed to a solid controlled release dosage form comprising: a core comprising a first portion of an opioid analgesic dispersed in a first matrix material; and a shell encasing the core and comprising a second portion of the opio…
USPTO Abstract
In certain embodiments, the present invention is directed to a solid controlled release dosage form comprising: a core comprising a first portion of an opioid analgesic dispersed in a first matrix material; and a shell encasing the core and comprising a second portion of the opioid analgesic dispersed in a second matrix material; wherein the amount of opioid analgesic released from the dosage form is proportional within 20% to elapsed time from 8 to 24 hours, as measured by an in- vitro dissolution in a USP Apparatus 1 (basket) at 100 rpm in 900 ml simulated gastric fluid without enzymes (SGF) at 37 C.
Drugs covered by this patent
Bibliographic data sourced from FDA Orange Book + USPTO public records. Plain-English summary generated by AI grounded in source text. Patent term extensions (PTR, SPC, pediatric) may shift the effective expiry. Not legal advice.
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