blockbuster orphan drug

A drug that was originally developed to treat an orphan disease, which can also be used to treat a non-orphan (read, high-volumes) disease, allowing the pharmaceutical company to charge orphan drug prices.

Examples
Human growth hormone (Humatrope, Protropin), erythropoietin (Epogen), pentamidine aerosol (Nebupent), alglucerase (Ceredase), selegiline (Eldepryl).

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