Simultaneous determination of phentermine and topiramate in human plasma by liquid chromatography-tandem mass spectrometry with positive/negative ion-switching electrospray ionization and its application in pharmacokinetic study Ni, Y.; Zhou, Y.; Xu, M.; He, X.; Li, H.; Haseeb, S.; Chen, H.; Li, W. Journal of Pharmaceutical and Biomedical Analysis 107: 444-449 2015 1873-264X 10.1016/j.jpba.2015.01.035 https://eurekamag.com/research/058/857/058857036.php