** Shares of drugmaker Heron Therapeutics HRTX.O rise
86.4% to $2.20 premarket
** On Tuesday, HRTX said a U.S. district court ruled in
favor of co in patent lawsuit against Fresenius Kabi USA
** Court validates HRTX's Cinvanti patents until 2035,
blocking Fresenius from making a generic version, co said
** Cinvanti is a medication used to prevent nausea and
vomiting caused by chemotherapy
** Fresenius Kabi did not immediately respond to a Reuters
request for comment
** As of last close, stock had fallen 30.6% YTD
(Reporting by Kamal Choudhury in Bengaluru)
((Kamal.Choudhury@thomsonreuters.com;))