CYP2D6 (cytochrome P450, family 2, subfamily D, polypeptide 6) (eg, drug metabolism), gene analysis, common variants (eg, *2, *3, *4, *5, *6, *9, *10, *17, *19, *29, *35, *41, *1XN, *2XN, *4XN)
CPT4 code
Name of the Procedure:
CYP2D6 Gene Analysis (Cytochrome P450, Family 2, Subfamily D, Polypeptide 6) for Drug Metabolism, Common Variants (*2, *3, *4, *5, *6, *9, *10, *17, *19, *29, *35, *41, *1XN, *2XN, *4XN)
Summary
CYP2D6 gene analysis is a lab test that looks for common genetic variations in the CYP2D6 gene. These variations can influence how your body metabolizes certain medications. By understanding your specific gene variants, healthcare professionals can better predict how you will respond to medications.
Purpose
The purpose of this test is to tailor medication choices and dosages based on your genetic profile, ensuring the most effective and safest treatment for you. It addresses issues related to drug metabolism, such as adverse drug reactions or lack of therapeutic effect.
Indications
- Unusual reactions to medications (either adverse effects or lack of response).
- Personal or family history of drug sensitivities.
- Preparing for treatment with medications that are metabolized by the CYP2D6 enzyme, such as antidepressants, antipsychotics, opioids, and beta-blockers.
- Part of a comprehensive pharmacogenomic assessment.
Preparation
- No specific preparation is generally needed.
- Inform your healthcare provider about any medications or supplements you're currently taking.
- In some cases, you might be asked to refrain from taking certain medications before the test, as they could affect the results.
Procedure Description
- Sample Collection: A small blood sample or a cheek swab is collected from the patient.
- DNA Extraction: The genetic material (DNA) is extracted from the sample.
- Genotyping: Laboratory techniques are used to analyze the DNA and identify specific CYP2D6 gene variants.
- Result Interpretation: A specialist interprets the results to determine the presence of specific CYP2D6 gene variants.
Tools used include PCR (Polymerase Chain Reaction) equipment and sequencing technologies. No anesthesia or sedation is required for this non-invasive test.
Duration
The sample collection takes a few minutes. Analyzing the DNA and getting results can take several days to a few weeks, depending on the laboratory.
Setting
The sample collection can be done in a doctor's office, outpatient clinic, or hospital. The DNA analysis is conducted in a specialized lab.
Personnel
- Medical lab technician or nurse for sample collection.
- Geneticist or lab scientist for DNA analysis.
- Healthcare provider (e.g., pharmacist, genetic counselor, physician) for interpretation and consultation.
Risks and Complications
- Minimal risk from blood draw, such as slight discomfort or bruising at the puncture site.
- Rare risk of infection.
Benefits
- Personalized medication therapy leading to more effective treatment with fewer side effects.
- Reduced risk of adverse drug reactions.
- Enhanced understanding of your drug metabolism capabilities, aiding in better healthcare decisions.
Recovery
- No downtime or recovery required.
- Normal activities can be resumed immediately after sample collection.
Alternatives
- Empirical adjustment of medications based on trial and error.
- Other pharmacogenetic tests for different genes involved in drug metabolism.
Patient Experience
- Minimal discomfort during blood draw or cheek swab.
- No pain or discomfort after the sample is collected.
- Results discussion may include recommendations for medication adjustments.