Pharmacogenomics: Testing and Treatment Adjustment for Personalized Medication
Currently, disease treatment is not limited to just prescribing medication based on symptoms but also includes finding the most suitable treatment for each individual. Pharmacogenomics, or pharmacogenetic testing, is one of the medical innovations that applies genetic knowledge to disease treatment and medication use.
What are the advantages and benefits of pharmacogenomic testing? Who is this program suitable for? How cost-effective is it? You can learn about these here.
What is Pharmacogenomics?
Pharmacogenomic testing, or Drug–Gene Profile testing, studies the relationship between an individual’s genetics and their response to medication. It applies genetic knowledge to examine how drugs affect each person’s body, helping doctors select and adjust medication dosages appropriately for each patient.
Pharmacogenomic testing is based on the principle that genetic differences among individuals affect their response to drugs. This may cause the same medication to have varying effectiveness in different people or cause severe side effects in some but not in others.
In pharmacogenomic testing, doctors analyze the patient’s DNA to identify gene mutations related to drug metabolism in the body. This information helps doctors to
- choose the most suitable medication for each patient
- adjust the dosage according to the patient’s metabolism
- avoid medications that may cause severe side effects
- enhance treatment effectiveness
Currently, pharmacogenomic testing can be applied to more than 500 types of drugs and is continuously expanding to cover many drug groups, especially anticoagulants, lipid-lowering drugs, pain relievers, sleeping pills, psychiatric medications, anticonvulsants, as well as drugs used for cancer, heart disease, infections, peptic ulcers, allergies, and more.
What are the Benefits of Pharmacogenomic Testing?
Pharmacogenomic testing offers several benefits, including
- Improved Treatment Effectiveness
Knowing the patient’s genetic information allows doctors to select the most effective medication for each individual, resulting in more effective treatment, better patient response, and faster recovery.
- Reduced Risk of Drug Side Effects
Pharmacogenomic testing helps doctors identify which medications may cause side effects in patients, allowing them to avoid potentially harmful drugs. This reduces the risk of allergic reactions or adverse drug reactions (ADRs), which in some cases can be severe or fatal.
- Long-term Cost Savings
Although pharmacogenomic testing may incur additional costs initially, it can save money in the long run by
✓ reducing the use of unnecessary or ineffective medications
✓ shortening treatment duration by selecting the appropriate medication from the start
✓ lowering costs related to treating drug side effects
- Increased Medication Safety
Knowing genetic information related to drug metabolism helps doctors accurately calculate the appropriate dosage for each patient, reducing the risk of overdosing or underdosing.
- Assistance in Long-term Treatment Planning
For patients with chronic diseases requiring long-term medication, pharmacogenomic testing helps doctors plan effective long-term treatment by selecting suitable drugs and adjusting dosages for each individual.
Who is Pharmacogenomic Testing Suitable For?
Pharmacogenomic testing is suitable for various groups, such as
- Chronic Disease Patients
Individuals with chronic conditions requiring long-term medication, such as diabetes, hypertension, heart disease, or psychiatric disorders. Pharmacogenomic testing helps doctors select and adjust medications appropriately, reducing the risk of long-term side effects.
- Cancer Patients
Cancer treatment often involves potent drugs with potentially severe side effects. Pharmacogenomic testing helps doctors choose the most effective drugs with the least side effects for each patient and assess the risk of severe side effects, such as low white blood cell count.
- Individuals with a History of Drug Allergies or Severe Side Effects
For those who have experienced drug allergies or severe side effects, pharmacogenomic testing helps doctors identify which drugs pose risks, allowing them to avoid harmful medications.
- Children and Elderly
Children and the elderly are often more sensitive to medications and may experience side effects more easily. Pharmacogenomic testing helps doctors select and adjust medications appropriately, reducing the risk of adverse effects.
- Individuals Taking Multiple Medications
For patients taking multiple medications, such as those with several chronic diseases, pharmacogenomic testing helps doctors assess the risk of drug interactions and adjust treatment plans to minimize these risks.
- Those Interested in Preventive Health Care
Even without current illness, individuals interested in preventive health care can undergo pharmacogenomic testing to learn about genetic factors that may affect future drug responses, aiding in long-term health planning.
How is Pharmacogenomic Testing Performed?
Pharmacogenomic testing can be done for all ages and genders. The test is simple and involves a blood sample, with no need to fast before the test.
The test results are analyzed in a laboratory with high accuracy and interpreted by pharmacogenomics specialists and geneticists. The report is available within 2-3 weeks and sent to the doctor to review alongside patient information to assess how the patient is likely to respond to various medications and their risk of side effects.
Testing Procedure
- Consult with a doctor, pharmacist, or genetic counselor for explanation and guidance on the test
- Collect 3 ml of blood without fasting
- Send the blood sample to the laboratory for analysis
- Receive test results within 2-3 weeks
After testing, the patient will receive a pharmacogenomic card indicating the test results and a list of medications to be cautious with.
Why Choose Pharmacogenomic Testing at Phyathai 3 Hospital?
Phyathai 3 Hospital is fully equipped to provide pharmacogenomic testing services to enhance medication safety and effectiveness through in-depth genetic testing. This helps improve medication safety and efficacy, including dosage adjustment and management of adverse drug reactions.
Pharmacogenomic testing is a medical innovation that applies genetic knowledge to disease treatment and medication use. It helps doctors select and adjust medications appropriately for each patient, improving treatment effectiveness, reducing the risk of side effects, and saving costs in the long term.
Dr. Chutima Siridamrong
Anti-Aging Medicine Center
Phyathai 3 Hospital
