title: Should thiopurine methyltransferase (TPMT) activity be determined before prescribing azathioprine, mercaptopurine, or thioguanine?
authors.affiliation: Medicine Institute, Cleveland Clinic, Cleveland, OH, USA.
authors.forename: Jennifer
authors.initials: J
authors.lastname: DiPiero
authors.affiliation: Director, Internal Medicine and Community Medicine, MetroHealth Medical Center, Cleveland, OH, USA.|Assistant Professor, Case Western Reserve University School of Medicine, Cleveland, OH, USA.
authors.forename: Kathryn
authors.initials: K
authors.lastname: Teng
authors.affiliation: Director, Personalized Medication Program, Department of Pharmacy, Genomic Medicine Institute, Cleveland Clinic, Cleveland, OH, USA. E-mail: hicksj4@ccf.org.|Assistant Professor, Cleveland Clinic Lerner College of Medicine of Case Western Reserve University, Cleveland, OH, USA.
authors.forename: J Kevin
authors.initials: JK
authors.lastname: Hicks
mesh_terms: D001379:Azathioprine / Q000008:administration & dosage*; D060005:Genotyping Techniques; D006801:Humans; D015122:Mercaptopurine / Q000008:administration & dosage*; D008780:Methyltransferases / Q000235:genetics*; D010641:Phenotype; D013866:Thioguanine / Q000008:administration & dosage*
chemical_list: D015122:Mercaptopurine; D008780:Methyltransferases; C022745:thiopurine methyltransferase; D013866:Thioguanine; D001379:Azathioprine