Described herein are compositions comprising particles of poorly soluble drugs, in particular opiods, encapsulated by stabilizers, in particular polyethylene glycol (PEG). Further described are pharmaceutical compositions comprising such encapsulated compositions. Also described are methods of making such encapsulated particle compositions, and methods of making the corresponding pharmaceutical compositions. The encapsulated particle compositions described herein allow poorly soluble drugs to be administered with good bioavailability by routes that are non-invasive to patients, such as by oral administration.
