Ammonia N-13 is a radioactive diagnostic agent used in PET (positron emission tomography) scans. The active ingredient, [13N] ammonia, has the molecular formula of 13NH3 with a molecular weight of 16.02.
- Mechanism
- Curator reviewed
Ammonia N 13 Injection is a radiolabeled analog of ammonia that is distributed to all organs of the body after intravenous administration. It is extracted from the blood in the coronary capillaries into the myocardial cells where it is metabolized to glutamine N 13 and retained in the cells. The presence of ammonia N 13 and glutamine N 13 in the myocardium allows for PET imaging of the myocardium.
- Primary indication
- For diagnostic Positron Emission Tomography (PET) imaging of the myocardium under rest or pharmacologic stress conditions to evaluate myocardial perfusion in patients with suspected or existing coronary artery disease.Curator reviewed · 1 structured indication
- Formula / weight
- H3N · 16.03 g/mol (avg)
- First approval
- United States, 2007
- Also known as
- (13N)Ammonia · Ammonia N 13
- Brand names
Resolves to
QGZKDVFQNNGYKY-BJUDXGSMSA-NSMILES[13NH3]What you can answer from here — as of September 21, 2026
Which other approved drugs treat the same conditions as Ammonia N-13, and which companies have late-stage candidates in those indications?
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