see also: [[Hypertensive Emergency]] > [!info] > [Category::anti-hypertensive] > [Class::vasodilator] - mostly arterial dilator (**afterload reducer**) - also some venous - often used in combo with beta blockers for dissection - longstanding tx for hypertensive emergency **Onset** 1-2 minutes **half life:** very short, a few minutes **key issues:** - produces [[Cyanide]] metabolites (if bad renal function) - can produce tachycardia - photosensitive (needs to be wrapped in foil)