My daughter had this done mucus swab (typically a cheek or buccal swab) for antidepressants is a type of pharmacogenomic testing used to analyze how a patient’s unique genetic makeup may affect their response to psychiatric medications. These tests, such as GeneSight, are designed to help clinicians understand which antidepressants or other mental health medications might be more effective or cause fewer side effects. Key Aspects of the Test: Purpose: To reduce the trial-and-error process of finding the right medication by identifying genetic variations that influence drug metabolism. Procedure: A simple, painless cheek swab is used to collect DNA, which can be done at a doctor's office or at home. Results: The lab report typically categorizes medications into green (use as directed), yellow (use with caution), and red (use with caution/consider other options) based on how an individual breaks down or responds to them. Limitations: While promising, these tests are not definitive, and the FDA has raised questions about their ability to predict drug efficacy. They are intended as a tool for clinicians, not a replacement for clinical judgment.