(Image source: creakyjoints.org) Horizon Pharma Inc (NASDAQ:HZNP) shares are advancing on news that the biopharmaceutical company will acquire Vidara Therapeutics International, an Irish based company for $660 million. Horizon Pharma develops medicine that treats therapeutic conditions. Acquiring Vidara Therapeutics creates good synergy between the two pharmaceutical companies and increases Horizon’s product pipeline. In addition, Horizon can take advantage of Ireland’s low corporate tax environment.