** Shares of drugmaker Avadel Pharmaceuticals AVDL.O rise
~14% to $16.97, its highest since July 2023
** Co estimates fourth-quarter revenue of $19 mln, higher
than analysts' average expectation of $15.9 mln - LSEG data
** The company makes almost all of its revenue from its
sleep disorder drug Lumryz, which was approved by US regulators
in May 2023
** Says it has about $105 mln in cash, cash equivalents
and marketable securities as of Dec. 31
** Stock was up 97.2% in 2023
(Reporting by Christy Santhosh)
((Christy.Santhosh@thomsonreuters.com))