Biochem/physiol Actions Trandolapril is an ACE inhibitor. Trandolapril differs from other ACE inhibitors in that it has a longer biological half-life and a high degree of lipophilicity. Other Notes Tandem Mass Spectrometry data independently generated by Scripps Center for Metabolomics is available to view or download in PDF. T4827.pdf Tested metabolites are featured on Scripps Center for Metabolomics METLIN Metabolite Database. To learn more, visit sigma.com/metlin.