Alpha-adrenergic agonists

Adrenaline, also known as epinephrine and alternatively spelled adrenalin, is a hormone and medication which is involved in regulating visceral functions (e.g., respiration). It appears as a white microcrystalline granule. Adrenaline is normally produced by the adrenal glands and by a small number of neurons in the medulla oblongata. It plays an essential role in the fight-or-flight response by increasing blood flow to muscles, heart output by acting on the SA node, pupil dilation response, and blood sugar level. It does this by binding to alpha and beta receptors. It is found in many animals,

Norepinephrine (NE), also called noradrenaline (NA) or noradrenalin, is an organic chemical in the catecholamine family that functions in the brain and body as a hormone, neurotransmitter and neuromodulator. The name "norepinephrine" (from Ancient Greek ἐπῐ́ (epí), "upon", and νεφρός (nephrós), "kidney") is usually preferred in the United States, whereas "noradrenaline" (from Latin ad, "near", and ren, "kidney") is more commonly used in the United Kingdom and the rest of the world. "Norepinephrine" is also the international nonproprietary name given to the drug. Regardless of which name is use

Isoprenaline, also known as isoproterenol and sold under the brand name Isuprel among others, is a sympathomimetic medication which is used in the treatment of acute bradycardia (slow heart rate), heart block, and rarely for asthma, among other indications. It is used by injection into a vein, muscle, fat, or the heart, by inhalation, and in the past under the tongue or into the rectum.

Droxidopa, also known as 'L-threo-dihydroxyphenylserine (L-DOPS) and sold under the brand names Northera and Dops' among others, is sympathomimetic medication which is used in the treatment of hypotension (low blood pressure) and for other indications. It is taken by mouth.

Norfenefrine, also known as '''meta-octopamine or norphenylephrine and sold under the brand name Novadral' among others, is a sympathomimetic medication which is used in the treatment of hypotension (low blood pressure). Along with its structural isomer p''-octopamine and the tyramines, norfenefrine is a naturally occurring endogenous trace amine and plays a role as a minor neurotransmitter in the brain.

Tramazoline is a chemical that is used in the form of tramazoline hydrochloride in nasal decongestant preparations. It is an α-adrenergic receptor agonist that inhibits secretion of nasal mucus.

use of epinephrine as medication

Fenoxazoline (trade name Aturgyl in Brazil) is a nasal decongestant.

drugs that selectively bind to and activate alpha adrenergic receptors

'''meta-Hydroxynorephedrine or 3-hydroxynorephedrine, also known as 3,β-dihydroxyamphetamine''', is an adrenergic drug of the amphetamine class which was patented as a vasopressor and nasal decongestant but was never marketed. It is the racemic form of the sympathomimetic drug metaraminol.