Yes, Nitroglycerin and Glyceryl Trinitrate Are the Same Compound
Nitroglycerin and glyceryl trinitrate are identical—they are simply different names for the same medication with the chemical formula 1,2,3-propanetriol trinitrate. 1, 2
Chemical Identity
Both terms refer to the exact same organic nitrate vasodilator with:
- Chemical name: 1,2,3-propanetriol trinitrate
- Molecular weight: 227.09-227.1
- Same chemical structure and pharmacological properties 1, 2
The FDA drug labels explicitly confirm this equivalence, with some formulations labeled as "nitroglycerin" 1 and others as "glyceryl trinitrate" 2, yet containing identical active ingredients and specifications.
Nomenclature in Clinical Practice
The terminology varies by region and context:
- "Nitroglycerin" is predominantly used in North American medical practice and appears in current ACC/AHA guidelines 3
- "Glyceryl trinitrate" (GTN) is more commonly used in European and international literature 4, 5, 6
- Both terms are used interchangeably in the medical literature without distinction 4, 5, 6, 7, 8
Clinical Application
Regardless of which name is used, the medication functions identically as a vasodilator for:
- Acute anginal attacks (sublingual 0.3-0.4 mg every 5 minutes up to 3 doses) 3
- Persistent anginal pain (IV starting at 10 μg/min) 3
- Vasospastic angina and coronary microvascular dysfunction 9
The key clinical point: When you see either term in guidelines, prescriptions, or research literature, they refer to the same drug with identical dosing, contraindications, and clinical effects. The choice of terminology does not affect clinical decision-making or patient care.