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NAT2 Genotype

Published: July 27, 2026Updated: August 25, 2026

The NAT2 genotype measures variations in the N-acetyltransferase 2 gene, which affects the metabolism of certain drugs and environmental toxins.

Quick summary

NAT2 genotype predicts how quickly a person metabolizes specific drugs and toxins.

Medically reviewed by WellAlly Editorial TeamLast reviewed August 25, 2026Editorial policy

Key facts at a glance

Units
genotype
Clinical utility
predictive
Result kind
qualitative
FDA-cleared
Roche NAT2, Abbott Infiniti NAT2
interpretation: {"text":"Individuals may require lower doses of certain drugs to avoid toxicity.","label":"Slow Acetylator"}; {"text":"Individuals may need higher doses or alternative medications to achieve therapeutic effects.","label":"Rapid Acetylator"}

The N-acetyltransferase 2 (NAT2) gene is responsible for producing an enzyme that plays a crucial role in the metabolism of various drugs, including isoniazid, hydralazine, and procainamide. Variations in this gene can lead to different enzymatic activities, which in turn affect how quickly or slowly these drugs are metabolized.

Individuals can be classified as slow, intermediate, or rapid acetylators based on their NAT2 genotype. This classification is important for determining appropriate drug dosages and predicting potential adverse reactions.

Understanding a patient's NAT2 genotype can help healthcare providers tailor treatments to minimize side effects and improve therapeutic outcomes. This is particularly relevant in the fields of pharmacology and toxicology.

Frequently asked questions

What is the clinical significance of NAT2 genotyping?
NAT2 genotyping helps in predicting an individual's ability to metabolize specific drugs, thereby guiding dosage adjustments and reducing the risk of adverse reactions.
Can NAT2 genotyping influence treatment decisions?
Yes, knowing a patient's NAT2 genotype can help healthcare providers choose the most effective and safe drug therapy.
  1. 1
    Pharmacogenomics of NAT2 and Its Role in Drug TherapySource
  2. 2
    N-acetyltransferase 2 (NAT2) GenotypingSource

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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 25, 2026. · Read our editorial policy