Yohimbin

DEA NFLIS-Drug Category -> Hallucinogens

Pharmaceuticals -> Listed in ZINC15

2.73

2.01

189.51 Ų [M+Na]+ [CCS Type: TW; Method: calibrated with polyalanine and drug standards]

186.5 Ų [M+H]+ [CCS Type: TW; Method: Major Mix IMS/Tof Calibration Kit (Waters)]

Danger

H301 (100%): Toxic if swallowed [Danger Acute toxicity, oral]

P261, P262, P264, P270, P271, P280, P301+P316, P302+P352, P304+P340, P316, P321, P330, P361+P364, P403+P233, P405, and P501 (click each P-code to see the statement)

Aggregated GHS information provided per 27 reports by companies from 2 notifications to the ECHA C&L Inventory. Each notification may be associated with multiple companies.

Regulation (EC) No 178/2002 (amended)

Yohimban-16-carboxylic acid, 17-hydroxy-, methyl ester, (16.alpha.,17.alpha.)-: Does not have an individual approval but may be used as a component in a product covered by a group standard. It is not approved for use as a chemical in its own right.

In small clinical trials and case series, yohimbine therapy has not been linked to serum enzyme elevations or clinical liver disease. Although yohimbine is often found in weight loss and muscle building herbal combinations, it has not been associated with cases of clinically apparent acute liver injury.

G04BE04

G - Genito urinary system and sex hormones

QG - Genito urinary system and sex hormones

QV - Various

Yohimbine is an indolalkylamine alkaloid with chemical similarity to reserpine. Yohimbine blocks presynaptic alpha-2 adrenergic receptors. Its action on peripheral blood vessels resembles that of reserpine, though it is weaker and of short duration. Yohimbine's peripheral autonomic nervous system effect is to increase parasympathetic (cholinergic) and decrease sympathetic (adrenergic) activity. It is to be noted that in male sexual performance, erection is linked to cholinergic activity and to alpha-2 adrenergic blockade which may theoretically result in increased penile inflow, decreased penile outflow or both. Yohimbine exerts a stimulating action on the mood and may increase anxiety. Such actions have not been adequately studied or related to dosage although they appear to require high doses of the drug. Yohimbine has a mild anti-diuretic action, probably via stimulation of hypothalmic center and release of posterior pituitary hormone. Reportedly Yohimbine exerts no significant influence on cardiac stimulation and other effects mediated by (beta)-adrenergic receptors. Its effect on blood pressure, if any, would be to lower it; however, no adequate studies are at hand to quantitate this effect in terms of Yohimbine dosage.

Yohimbine is a pre-synaptic alpha 2-adrenergic blocking agent. The exact mechanism for its use in impotence has not been fully elucidated. However, yohimbine may exert its beneficial effect on erectile ability through blockade of central alpha 2-adrenergic receptors producing an increase in sympathetic drive secondary to an increase in norepinephrine release and in firing rate of cells in the brain noradrenergic nuclei. Yohimbine-mediated norepinephrine release at the level of the corporeal tissues may also be involved. In addition, beneficial effects may involve other neurotransmitters such as dopamine and serotonin and cholinergic receptors.