** Shares of WW International WW.O rise 14.8% to $30.89 premarket
** WeightWatchers, also known as WW International, says it will partner with Amazon AMZN.O to deliver medications, including injectable GLP-1 obesity treatments for its members
** Co says its customers will be able to check whether their medications are in stock and have the refrigerated drugs delivered more efficiently by using the Amazon Pharmacy option on its website
** WW says it will continue to allow patients to fill prescriptions through other pharmacies
** Up to last close, stock down 0.3% since it emerged from bankruptcy effective June 27
(Reporting by Christy Santhosh)
((Christy.Santhosh@thomsonreuters.com))