(Updates)
** Shares of Tenax Therapeutics TENX.O more than quadruple
to an eight-month high of $0.62; stock set for its best day ever
if gains hold
** Co says its drug for a type of heart failure has been
cleared by the FDA for late-stage trial
** TENX says it will start a late-study on the drug in Q4
** Drug being tested in some heart failure patients with
increased blood pressure in the lungs' vessels
** No FDA-approved treatments for the disease, which co
estimates affects more than 2 mln patients in North America by
2030
** Over 58.3 mln shares traded, more than 10x their 25-day
moving average
** Including session's gain, stock down ~72% YTD
(Reporting by Puyaan Singh)
((Puyaan.Singh@thomsonreuters.com;))