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Genetic Knowledge of Drug Reaction Type (Qualitative Genetic Test)

Published: August 9, 2026Updated: August 16, 2026

This test assesses whether a specific genetic variation may influence how your body processes certain medications, potentially affecting their safety or effectiveness.

Quick summary

["Helps determine if a medication could interact with your genes, impacting treatment responses."]

Medically reviewed by WellAlly Editorial TeamLast reviewed August 16, 2026Editorial policy

Key facts at a glance

LOINC
69550-2
Short code
Gen knwldge ref Type
Synonyms
Gen knwldge ref Type
Category
chemistry
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
molgen
Specimen volume
5 mL
Stability
Room temperature: 4h, Refrigerated: 24h, Frozen: 7d
Hemolysis max
500
Lipemia max
1000
Icterus max
500
TAT
4–24 hours
Order
routine

What This Test Measures

This test checks for a known genetic marker (qualitative analysis) that may be linked to certain drug reactions. It does not measure drug levels in your body but evaluates genetic predisposition.

How the Test Works

A small blood sample is taken to analyze DNA for the presence of a specific genetic variant. The test uses immunoassay or similar methods to detect this marker.

Why It Might Be Ordered

Your healthcare provider may recommend this test if you have a history of adverse reactions to medications, are prescribed certain drugs, or if you are considering a medication known to interact with this genetic variant.

What to Expect Before the Test

No special preparation is needed. You may have a small needle inserted into your arm to draw blood, similar to other blood tests. You can eat and drink normally before the test.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

◆Associated findings1

Short name

Genetic Drug Reaction Screen

Frequently asked questions

Could this test affect my medication choices?
Yes, if this genetic marker is present, your doctor may select medications that are less likely to cause adverse reactions in your case, or adjust your treatment plan accordingly.
Is this test covered by insurance?
Coverage depends on your insurance plan and medical necessity. Check with your provider or insurance company to confirm if this test is covered under your specific plan.
How long will it take to get results?
Results are typically available within 1 to 2 weeks after the sample is processed, depending on laboratory turnaround times.
  1. 1
    MedlinePlus — Laboratory TestsSource
  2. 2
    Lab Tests OnlineSource
  3. 3
    Mayo Clinic — Tests & ProceduresSource

Click any link to access the full source. PubMed Central (PMC) links provide free full-text access.

This information is for educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment.

Medical Disclaimer

This content is for general informational and educational purposes only and is not a substitute for professional medical advice, diagnosis, or treatment. Always seek the guidance of a qualified healthcare provider with any questions you have about a medical condition, and never disregard professional medical advice or delay seeking it because of something you read here.

If you think you may have a medical emergency, call your local emergency number or go to the nearest emergency department immediately.

Medically reviewed by WellAlly Editorial Team Last reviewed August 16, 2026. · Read our editorial policy