Jump to: navigation, search

Adrenergic agonist

An adrenergic agent is a drug, or other substance, which has effects similar to, or the same as, epinephrine (adrenaline). Thus, it is a kind of sympathomimetic agent. Alternatively, it may refer to something which is susceptible to epinephrine, or similar substances, such as a biological receptor (specifically, the adrenergic receptors).

Beta blockers block the action of epinephrine and norepinephrine in the body. Adrenergic drugs either stimulate a response (agonists) or inhibit a response (antagonists). The five categories of adrenergic receptors are: α1, α2, β1, β2, and β3, and agonists vary in specificity between these receptors, and may be classified respectively. However, there are also other mechanisms of adrenergic agonism. Epinephrine and norepinephrine are endogenous and broad-spectrum. More selective agonists are more useful in pharmacology.



Direct action

  • Alpha-adrenergic agonist
  • Beta-adrenergic agonist

Indirect action

  • Amphetamine
  • Tyramine

Mixed action

  • Ephedrine
  • Pseudoephedrine

See also

  • Adrenergic receptor

External links

  1. REDIRECT Template:MeSH name


Premier Equine Classifieds


Subscribe to our newsletter and keep abreast of the latest news, articles and information delivered directly to your inbox.

Did You Know?

Modern horse breeds developed in response to a need for "form to function", the necessity to develop certain physical characteristics in order to perform a certain type of work... More...

The Gypsy Cob was originally bred to be a wagon horse and pulled wagons or caravans known as Vardos; a type of covered wagon that people lived in... More...

Archaeological evidence indicates that the Arabian horse bloodline dates back 4,500 years. Throughout history, Arabian horses spread around the world by both war and trade.... More...

That the term "Sporthorse" is a term used to describe a type of horse rather than any particular breed... More...