<prompt> Translate the following text to EnglishSibutramine, ambayo ina athari za phen-phen katika kidonge kimoja, na orlistat, ambayo huzuia kunyonya mafuta kutoka matumbo, zinapitia majaribio ya idhini ya Utawala wa Chakula na Dawa.  <response>: Sibutramine, with fen-phens effects in one pill, and orlistat, which prevents fat absorption from the intestines, are undergoing Food and Drug Administration approval testing. 