Serotonin: Difference between revisions

>Kaylee
m Text replacement - " drugs " to " substances "
>Kaylee
m Text replacement - " drug " to " substance "
Line 18: Line 18:
A few psychedelic substances are full agonists of the 5-HT<sub>2A</sub> receptor; among them are [[25I-NBOMe]] and [[Bromo-DragonFLY]].  
A few psychedelic substances are full agonists of the 5-HT<sub>2A</sub> receptor; among them are [[25I-NBOMe]] and [[Bromo-DragonFLY]].  
====Partial agonists====
====Partial agonists====
A serotonin [[Agonist#Agonists|partial agonist]] is a drug that binds to and activates a serotonin receptor, but only has partial efficacy at the receptor relative to a full agonist.
A serotonin [[Agonist#Agonists|partial agonist]] is a substance that binds to and activates a serotonin receptor, but only has partial efficacy at the receptor relative to a full agonist.


Most classical psychedelic substances are partial agonists of the 5-HT<sub>2A</sub> receptor; among them are [[LSD]], [[psilocin]] and [[mescaline]]. Many antidepressants, anxiolytics/anti-anxiety drugs, and cluster headache medicines are partial serotonin receptor agonists.
Most classical psychedelic substances are partial agonists of the 5-HT<sub>2A</sub> receptor; among them are [[LSD]], [[psilocin]] and [[mescaline]]. Many antidepressants, anxiolytics/anti-anxiety drugs, and cluster headache medicines are partial serotonin receptor agonists.
Line 28: Line 28:


====Releasing agents====
====Releasing agents====
A serotonin [[Releasing Agent|releasing agent]] is a drug that induces the release of serotonin from the presynaptic neuron into the synapse, leading to an increase in the extracellular concentrations of serotonin.
A serotonin [[Releasing Agent|releasing agent]] is a substance that induces the release of serotonin from the presynaptic neuron into the synapse, leading to an increase in the extracellular concentrations of serotonin.


Many recreational substances are serotonin releasing agents; among them are [[MDMA]], [[MDA]] and [[mephedrone]]. Many analgesics/pain-relievers and appetite suppressants are also serotonin releasing agents.
Many recreational substances are serotonin releasing agents; among them are [[MDMA]], [[MDA]] and [[mephedrone]]. Many analgesics/pain-relievers and appetite suppressants are also serotonin releasing agents.
Line 38: Line 38:


====Antagonists====
====Antagonists====
A serotonin receptor [[antagonist]] is a type of receptor drug that inhibits action at serotonin receptors.
A serotonin receptor [[antagonist]] is a type of receptor substance that inhibits action at serotonin receptors.


Many [[anti-psychotics]] and anti-emetics are serotonin receptor antagonists. One example is galanolactone, a chemical found in ginger, that acts as an anti-emetic via its action as a 5-HT<sub>3</sub> antagonist.
Many [[anti-psychotics]] and anti-emetics are serotonin receptor antagonists. One example is galanolactone, a chemical found in ginger, that acts as an anti-emetic via its action as a 5-HT<sub>3</sub> antagonist.
Line 45: Line 45:
''Main Article: [[Serotonin Syndrome|Serotonin Syndrome]]''
''Main Article: [[Serotonin Syndrome|Serotonin Syndrome]]''


Extremely high levels of serotonin can cause a condition known as serotonin syndrome that has toxic and potentially fatal effects. Serotonin syndrome, also known as serotonin toxicity, can be induced via overdose of particular drugs, drug interactions, and recreational drug use. Many drug interactions have been found to cause serotonin syndrome, the most notorious of which being the combination of an SSRI antidepressant and an [[MAOI]] antidepressant.
Extremely high levels of serotonin can cause a condition known as serotonin syndrome that has toxic and potentially fatal effects. Serotonin syndrome, also known as serotonin toxicity, can be induced via overdose of particular drugs, substance interactions, and recreational substance use. Many substance interactions have been found to cause serotonin syndrome, the most notorious of which being the combination of an SSRI antidepressant and an [[MAOI]] antidepressant.


Symptoms can start showing within minutes and can include increased heart rate, sweating, anxiety, hyperthermia, shivering, high blood pressure, agitation, seizures, and rarely death. Symptoms usually resolve after 24 hours, but can last up to several months in some cases.
Symptoms can start showing within minutes and can include increased heart rate, sweating, anxiety, hyperthermia, shivering, high blood pressure, agitation, seizures, and rarely death. Symptoms usually resolve after 24 hours, but can last up to several months in some cases.