Express Gene Molecular Diagnostics Laboratory is a CLIA Certified Laboratory located in Miami, Florida. Our focus is genetic testing and we are offer a number of important genetic tests, including pharmacogenomics test. Pharmacogenetic (PGx) testing is a type of genetic test that assesses a patient's risk of an adverse response or likelihood to respond to a given drug. This gives health care providers insight into what medications to use for a given condition. The PGx test allows physicians to make informed, science-based drug selection and to appropriately adjust the dosing.