BUZZ-Nuvo Research Inc: Top loser on Toronto Stock Exchange
** Specialty pharmaceutical company's shares down 39.8 pct at C$5.33; stock top percentage loser on the Toronto Stock Exchange
** Says experimental drug to treat allergic rhinitis fails to meet primary goal in mid-stage study
** Allergic rhinitis is a common condition characterized by nasal symptoms triggered by response to one or more allergens such as pollens and house dust mites
** Up to Thursday's close, stock had nearly tripled in the past 12 months
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