What Neurotransmitters Are Involved in Anxiety Disorders?

Anxiety disorders affect around 18 percent of American adults in a given year, according to the National Institute of Mental Health. The neurotransmitters gamma-aminobutyric acid, serotonin and norepinephrine are all thought to be involved in the development of anxiety disorders. Manipulation of these interrelated neurotransmitter systems with medications is frequently used to treat anxiety disorders.

Medications can often help with anxiety disorders. (Image: Polka Dot Images/Polka Dot/Getty Images)


Medical researchers believe problems with the GABA neurotransmitter system in the brain are related to anxiety disorders. Brain receptors for GABA are the targets for medications used to relieve short-term anxiety symptoms, the benzodiazepines. Some commonly prescribed benzodiazepines include diazepam (Valium), alprazolam (Xanax), clonazepam (Klonopin) and lorazepam (Ativan). These drugs enhance the calming effect that GABA has in the brain. With the anxiety condition known as panic disorder, the panic attacks may be caused by interference with GABA receptor function.


Serotonin is also thought to be important in anxiety, especially the panic disorder type. Some evidence for this is that the drug buspirone -- which works to help reduce anxiety by enhancing serotonin activity in the brain -- binds to certain serotonin receptors. Normal serotonin activity appears to be important in maintaining feelings of well-being, and deficiencies in serotonin may be related to the development of anxiety disorders.

The serotonin-specific reuptake inhibitor drugs are often recommended as first-line treatment of anxiety disorders and SSRIs have been found to be effective for many people. These medications increase the serotonin available to brain cells. Specific SSRIs commonly used to treat anxiety disorders include fluoxetine (Prozac), paroxetine (Paxil), sertraline (Zoloft) and escitalopram (Lexapro).


Norepinephrine is a close cousin to epinephrine, also known as adrenalin. The "fight or flight" reaction to stress is associated with elevated adrenalin levels, and the stress-related sense of being in a state of fear is similar to anxiety, and especially to panic. Norepinephine function is thought to be involved in the symptoms of anxiety that are similar to those in stress, fear and panic.

Serotonin-norepinephrine reuptake inhibitor drugs work on both the serotonin and the norepinephrine neurotransmitter systems, and are also commonly used as first-line treatment for anxiety disorders. Examples of SNRIs medications include duloxetine (Cymbalta) and venlafaxine (Effexor).

Other Neurotransmitters

Dopamine, epinephrine, acetylcholine and histamine are other neurotransmitters may also be involved in anxiety disorders. More research is needed to learn exactly how these and potentially other neurotransmitters are related to the causes and effective treatment of the symptoms of anxiety disorders.

Load Comments

Copyright © 2019 Leaf Group Ltd. Use of this web site constitutes acceptance of the LIVESTRONG.COM Terms of Use , Privacy Policy and Copyright Policy . The material appearing on LIVESTRONG.COM is for educational use only. It should not be used as a substitute for professional medical advice, diagnosis or treatment. LIVESTRONG is a registered trademark of the LIVESTRONG Foundation. The LIVESTRONG Foundation and LIVESTRONG.COM do not endorse any of the products or services that are advertised on the web site. Moreover, we do not select every advertiser or advertisement that appears on the web site-many of the advertisements are served by third party advertising companies.