A composition for oral, transdermal or subdermal administration to a subject is described. The composition contains: (a) an agonist component; (b) an antagonist component containing at least one antagonist and having a delayed time of release; and (c) an immediate release antagonist removal component, where the subject includes a gastrointestinal tract and the antagonist removal component is present in an amount sufficient to substantially remove the antagonist component from the gastrointestinal tract of the subject before the time of release of the antagonist component. The composition may be delivered to the subject by a method which includes the step of administering the composition orally, transdermally or subdermally to the subject. When the composition of the present invention is administered orally, the method of the present invention may include the step of administering a potassium compound to the subject.
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