Updates
** Shares of therapy developer Trevi Therapeutics TRVI.O rise 40.5% to touch a four-year high of $6.04
** Co says its therapy, Haduvio, met the main goal in a mid-stage trial testing in patients with a type of chronic cough
** Currently, there are no approved treatments in the U.S. for coughing bouts that don't have an identifiable cause or those that persist despite treating underlying conditions
** GSK GSK.L is developing a chronic cough treatment, and Merck has an experimental drug for the disease that faced two FDA rejections in the past
** Brokerage Raymond James upgrades its rating to "strong buy" from "outperform"
** Up to last close, TRVI up 45.8% in the last 12 months
(Reporting by Christy Santhosh and Siddhi Mahatole)
((Christy.Santhosh@thomsonreuters.com))