1041988-A1 cites 2 patents.

The invention relates in part to a method of reducing the abuse potential of an oral dosage form of an opioid analgesic, wherein an analgesically effective amount of an orally active opioid agonist is combined with an opioid antagonist into an oral dosage form which would require at least a two-step extraction process to be separated from the opioid agonist, the amount of opioid antagonist including being sufficient to counteract opioid effects if extracted together with the opioid agonist and administered parenterally.

Title
A method of preventing abuse of opioid dosage forms
Application Number
EP19980965431 19981222
Publication Number
1041988 (A1)
Application Date
December 22, 1998
Publication Date
October 11, 2000
Inventor
Palermo Philip
US
Assignee
Euro Celtique
LU
IPC
A61K 31/485
A61P 25/00
A61K 31/485
A61K 31/44
A61K 31/439
A61P 25/36
A61P 25/34
A61K 31/485
A61K 31/44
A61K 31/439
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