http://en.wikipedia.org/wiki/Morphine/naltrexone :Embeda capsules are formulated with morphine pellets and an inner core containing naltrexone. The purpose of this formulation was to prevent people from crushing the tablet for intravenous injection or intranasal ingestion. If crushed, the naltrexone would mix with the morphine and competitively antagonizes morphine's physiological effects. Ingested orally and intact, the inner core encapsulating the naltrexone is not digestible in the gastrointestinal tract.

à celui qui a eu cette idée.

Bon par contre ça a foiré au final :

However, King Pharmaceuticals voluntarily recalled Embeda in 2011 after complaints from the FDA in regards to King Pharmaceuticals omitting information regarding the potentially fatal reaction if crushed and swallowed and also for making unsubstantiated claims regarding Embeda's reduced abuse potential.