"It's an easy way to get your hands on an opiate-based drug, a painkiller, for recreational use, " Stillwell says.

CNN: Using dentists as dope dealers

Alkermes is starting late-stage clinical trials of Vivitrex, an injectable form of naltroxene--an FDA-approved drug for the treatment of opiate and alcohol dependence, and it has several other drugs in development.

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While Covidien has a large pharmaceutical business--it's the largest U.S. manufacturer of acetaminophen, the ingredient in Tylenol, and opiate painkillers--Meelia isn't girding to compete with drug giants like Merck.

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