** Shares of drugmaker BDSI.O up 51.7% at $5.50 premarket
** Collegium Pharmaceutical Inc COLL.O to buy co for
roughly $604 mln to expand its portfolio of pain drugs, and
enter market for neurological treatments urn:newsml:reuters.com:*:nGNX9RDTym
** COLL agreed to pay $5.60/shr, a 53.8% premium to Friday's
closing price
** COLL says it expects deal to immediately add to earnings
** BDSI sells opioid painkiller Belbuca, and owns rights to
sell Dr Reddy's Laboratories REDY.NS migraine drug Elyxyb in
the U.S. and Canada
** Up to Friday's close, stock had fallen ~12% in past 12
months
(Reporting by Manas Mishra)
((Manas.Mishra@thomsonreuters.com;
www.twitter.com/Manaswrites15))