| − | Deficiencies in serotonin are vulnerable to disorders such as clinical [[depression]], Obsessive-Compulsive Disorder, [[anxiety|anxiety disorders]], [[bipolar disorder]], irritable bowel syndrome, ear infections, and [[migraine]]s. Also, an organism's activity cycle is affected, changing the organism's eating and sleeping habits. Consequently, medications such as antidepressants increase serotonin levels in the brain and are often used to treat these disorders in mammals. | + | Deficiencies in serotonin are vulnerable to disorders such as clinical [[depression]], Obsessive-Compulsive Disorder, [[anxiety|anxiety disorders]], [[bipolar disorder]], irritable bowel syndrome, ear infections, and [[migraine]]s. Also, an organism's activity cycle is affected, changing the organism's eating and sleeping habits. Consequently, medications such as antidepressants increase serotonin levels in the brain, or stabilise them, and are often used to treat these disorders in mammals. |