By Sheryl Ankrom, About.com
Updated: October 26, 2008
About.com Health's Disease and Condition content is reviewed by the Medical Review Board
Serotonin is a chemical messenger in the brain that plays a role in modulating anxiety, mood, sleep, appetite and sexuality. The class of antidepressants called Selective serotonin reuptake inhibitors (SSRIs) are generally considered first-line medications to treat panic disorder.
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