NTG stands for which term?

• A. Nitrogen Tonic Gel
• B. Nitric Tonic Gel
• C. Nitroglycerin
• D. Nerve Toxin Gas

Answer: (C)

NTG stands for Nitroglycerin, a nitrate medication used to treat chest pain from suspected heart ischemia. The name reflects the chemical Nitroglycerin, the drug that, when administered, releases nitric oxide in vascular smooth muscle. This triggers a cascade that raises cGMP and causes relaxation of smooth muscle, leading to vasodilation. The effect is mainly venodilation, which lowers preload, and some arterial dilation that can improve blood flow to ischemic areas and reduce myocardial oxygen demand. In practice, it's given sublingually as a tablet or spray (and IV in some settings). The other options aren’t standard medical terms for this drug—they aren’t real names for NTG, and one is a completely unrelated concept (nerve toxin gas).