Nitroglycerin (drug) is a medication.
Nitroglycerin was later adopted as a commercially useful explosive by Alfred Nobel, who experimented with safer ways to handle the dangerous compound after his younger brother, Emil Oskar Nobel, and several factory workers were killed in an explosion at the Nobels' armaments factory in 1864 in Heleneborg, Sweden
 The sublingual or tablet spray of nitroglycerin has a two minute onset and twenty five minute duration of action

