Adonidin, a non-nitrogenous, colorless, odorless, and very bitter amorphous powder derived from Adonis ver-nalis. It increases arterial tension, is mildly diuretic, and acts promptly. It is valuable in mitral insufficiency and interstitial myocarditis. It is recommended in dyspnea, in nicotine poisoning, and chronic diffuse nephritis.

The dose of Merck's adonidin is 1-16 to 74 grain. It is conveniently administered in the form of a tablet triturate.