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Nitroglycerin (Drug Concentration) in Serum/Plasma

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

This test measures the amount of nitroglycerin, a medication used to treat chest pain (angina) or high blood pressure, in your blood.

Quick summary

["Helps monitor your response to nitroglycerin therapy."]

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

Key facts at a glance

LOINC
73240-4
Short code
Nitroglycerin ind plt IgM SerPl Ql FC
Synonyms
Nitroglycerin ind plt IgM SerPl Ql FC
Category
glucose
Sample
serum
Container
Red-top tube (SST)
Units
N/A
Fasting
false
Population
adult
Sex
all
Age range
18–65 years
Method
flow-cytometry
CPT
82784
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

Why This Test Is Done

Your healthcare provider may order this test if you’re taking nitroglycerin (a nitrate medication) to manage conditions like angina or hypertension. It helps ensure the medication is working properly and at the right level in your body.

What to Expect Before the Test

No special preparation is needed. You may have a small needle inserted into your arm to draw blood. If you’re on nitroglycerin patches or sublingual tablets, inform your healthcare provider beforehand.

How the Test Results Are Interpreted

Results are compared to a reference range specific to nitroglycerin levels in blood. Low levels may indicate insufficient medication absorption, while very high levels could signal overdose or improper dosing.

Common Reasons for Abnormal Results

Low levels might suggest poor medication adherence, liver issues affecting drug metabolism, or incorrect dosing. High levels could indicate improper application of patches, accidental overdose, or rare metabolic conditions.

Clinical interpretation

How abnormal results are interpreted and what conditions they suggest.

This test is critical for adjusting treatment to prevent complications like severe low blood pressure or worsening chest pain. It helps balance effectiveness and safety in managing nitrate therapy.

Short name

Nitroglycerin Level

Frequently asked questions

How long does it take to get my test results?
Results are typically available within 1–3 business days, depending on your lab. Follow-up with your provider to discuss findings.
Can I stop taking nitroglycerin if my levels seem low?
Never stop taking nitroglycerin without consulting your doctor. Low levels may just mean your dose needs adjustment, not that the medication isn’t working.
Does diet or exercise affect nitroglycerin levels?
Dietary factors like alcohol or caffeine may influence how your body processes nitroglycerin, but exercise typically doesn’t directly alter blood levels. Always follow your provider’s guidance.
  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