Corynanthe yohimbe (Pausinystalia johimbe) - Yohimbe
"CONSTITUENTS: Spiegel obtained an extract of the bark, which contained a pigment that forms, on standing in alkaline solution, two alkaloids, yohimbin and an amorphous substance. The former crystallizes in white needles with silky lustre, and is soluble to the extent of two per cent in water, and dissolves also in alcohol and chloroform.
PREPARATIONS: The agent may be given in infusion, in the form of a powdered extract, or the alkaloid yohimbin. A liquid extract is also prepared.
Therapy: The current therapeutic journals of Austria and Germany have contained articles on the action of this remedy for the relief of impaired sexual function. ... Impotence from onanism, or persistent nocturnal emissions, with loss of appetite, was cured by this remedy in a short time Several other cases of a similar character were experimented on satisfactorily. In cases where the same weakness was present with chronic alcoholism, resulting in chronic disease of the stomach and enlargement of the liver, the agent had a satisfactory influence. Another case was cured, who, from sexual neurasthenia, had persistent headaches. ..."
(Finley Ellingwood: The American Materia Medica, Therapeutics and Pharmacognosy, 1915)