Will a lab test take us a step closer to "personalized medicine"? Approval of a genetic assay for drug utilization suggests so

The US Food and Drug Administration has approved a genetics-based test that detects how certain drugs are utilized in the body. The Invader UGT1A1 Molecular Assay detects variations in the gene UGT1A1, which produces an enzyme that is active in the metabolism of certain drugs, including irinotecan (Camptosar), used to treat colorectal cancer.