** Shares of drugmaker Amneal Pharmaceuticals AMRX.O rise 5.5% to $7.75 premarket
** Co says U.S. FDA has approved its self-administered migraine drug, Brekiya
** Brekiya will be available in U.S. by second half of 2025, co says
** Up to last close, stock down 7.2% YTD
(Reporting by Puyaan Singh)
((Puyaan.Singh@thomsonreuters.com;))