And some recent studies have linked alcoholism to genes involved in transporting serotonin through the brain.
"It sounds to me like your body just doesn't produce enough serotonin, " she said, matter-of-factly.
Serotonin is one of the brain's messenger molecules, and is particularly involved in establishing mood.
Like Cymbalta, Effexor works by preventing the brain from reabsorbing the neurotransmitters serotonin and norepinephrine.
The other, Belviq, works on brain receptors for serotonin, a neurotransmitter than triggers feelings of satisfaction.
Called lorcaserin, it stimulates production of serotonin, the same brain chemical that fen-phen did.
Princeton's Jacobs found that activating serotonin receptors in the (animal) brain aided in neurogenesis.
Serotonin syndrome often resolves within 24 hours of stopping any medication that increases serotonin.
CNN: Mixing migraine, depression drugs poses risk of serotonin syndrome
Laughter also raises the level of serotonin in the brain and in addition, produces endorphins.
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Serotonin is a chemical released in the brain that can affect mood and behavior.
It is one of a class of drugs called selective serotonin reuptake inhibitors (SSRI).
Serotonin and other neurotransmitters produced by gut neurons help the digestive track push food through the gut.
This effect is assumed to be related to activation of the serotonin 2B receptor on heart tissue.
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Their original experiment used a genetic switch to regulate production of a particular receptor molecule for serotonin.
Fenfluramine worked by increasing the amount of serotonin in the brain in a way that reduced appetite.
It can also cause too much serotonin to be released in the brain, which can be fatal.
One of the main factors identified in this research is low levels of the neurotransmitter serotonin.
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They also block other dopamine receptors linked to different neurotransmitters such as those for serotonin and glutamate.
They discovered that eating carbohydrates every two-and-a half hours helped balance her moods and increase her serotonin production.
They focused on drugs which work by increasing levels of the mood controlling chemical serotonin in the brain.
The resultant boomerang-shaped molecule was able to surgically strike the bad serotonin autoreceptors and spare the good receptors.
They focused on measuring the density of a specific type of receptor that responds to the mood chemical serotonin.
To start with, Dr Audero and her team were asking a completely different question one about serotonin's role in aggression.
Low serotonin levels in the brain are known to affect mood and sleep.
One of these chemicals is serotonin, the same chemical elevated by many antidepressants.
Wurtman realized that lowered levels of serotonin, the brain chemical that Prozac raises, were also partly responsible for PMDD.
Other researchers believe chocolate cravings have something to do with serotonin, a brain chemical that makes us feel relaxed.
If a triptan is taken with either an SSRI or SNRI, the drugs may increase serotonin to dangerous levels.
CNN: Mixing migraine, depression drugs poses risk of serotonin syndrome
More specialised cells use dopamine, serotonin, acetylcholine and a variety of other molecules.
These suggest that although serotonin may be central to Ecstasy's long-term effects, other neurotransmitters could be involved as well.
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