Serotonin is known as a “feel good” hormone, while norepinephrine boosts energy and alertness. SNRIs increase the levels of both of these hormones, which are also neurotransmitters that carry messages to different parts of the body.
Serotonin is a brain hormone that helps regulate mood, bowel function, and the sleep-wake cycle. When serotonin levels are just right, you will likely feel more focused, calmer, happier, and more emotionally stable.
Norepinephrine is an endocrine hormone that plays a role in the sleep-wake cycle, helping you feel more alert. Low levels of norepinephrine have been linked to lethargy, difficulty focusing, and low mood.
Another class of drugs, SSRIs, also treat mood disorders like depression and other conditions by raising serotonin levels.
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