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    Generalized anxiety disorder (GAD)

    Also known as GAD, generalised anxiety disorder, chronic worry

    Generalized anxiety disorder (GAD) is a condition in which worry about everyday things is excessive, out of proportion and hard to control, often for months or years.[1] NIMH estimates 2.7% of US adults have it in a given year.[2] CBT and SSRI or SNRI antidepressants are the main treatments, and NICE says the choice between them should follow the person's preference.[3][4]

    Editor reviewedStrict sourcingUpdated WikiMental health, Health and medicine
    Key facts

    Generalized anxiety disorder (GAD) is an anxiety disorder in which a person worries more often or more intensely than others about everyday matters, even when the worry is out of proportion to the situation.[1] It is one of the anxiety disorders WHO lists, alongside panic disorder and social anxiety disorder.[5]

    This page is general information, not medical advice. Only a clinician can diagnose GAD; if worry is affecting your life, talk to one.

    Symptoms

    NIMH says people with GAD may worry excessively about everyday things, struggle to control their worry, feel irritable or on edge, find it hard to relax or concentrate, sleep badly or feel tired, and have headaches, muscle aches or stomach aches.[6] The feelings can last for months or even years.[1]

    GAD usually develops gradually and starts in early adulthood, though it can begin at any age, and it is more common in women.[7] NIMH says its exact cause is unknown, but research points to a mix of genetics, brain chemistry, biology and environment.[8]

    Diagnosis and screening

    NIMH says a diagnosis requires difficulty controlling worry on most days for at least 6 months, plus at least three symptoms from a list that includes restlessness, fatigue, poor concentration, irritability, muscle tension and sleep problems.[9] The NHS uses a similar 6-month threshold.[10] A clinician may do a physical exam to rule out other causes.[11]

    The GAD-7 questionnaire was developed in 2006 to screen for GAD and rate its severity.[12][13] The uspstf recommends screening adults aged 64 or younger for anxiety disorders, and its evidence review found the GAD-7 had adequate accuracy for detecting GAD.[14][15] A positive screen should lead to a full assessment.[16]

    How common it is

    NIMH estimates that 2.7% of US adults had GAD in the past year and 5.7% will have it at some point, based on survey data from 2001 to 2003.[2] Among US adults with GAD in the past year, 32.3% had serious impairment.[17]

    Treatment

    OptionWhat guidelines and trials say
    Low-intensity helpNICE’s first-line options after monitoring: self-help, guided self-help or group courses[18]
    cognitive-behavioral-therapy or applied relaxationUsually 12 to 15 weekly one-hour sessions, per NICE[19]
    SSRI, then another SSRI or an SNRINICE suggests considering sertraline first on cost-effectiveness[4]
    PregabalinNICE: consider if SSRIs and SNRIs are not tolerated[20]
    BenzodiazepinesNICE: only short-term during a crisis[21]
    Prescription CBT appDaylightRx, FDA-cleared in 2024 for adults 22 and older, alongside usual care[22]

    NICE says that for GAD needing high-intensity treatment, the choice between therapy and medicine should follow the person’s preference, because there is no evidence either is better.[3] A 2019 network meta-analysis of 89 trials found duloxetine, pregabalin, venlafaxine and escitalopram effective with relatively good acceptability in adult outpatients.[23] See the anxiety treatments guide for more detail.

    Research

    In 2026 Definium Therapeutics reported that single doses of DT120, an LSD-based tablet, met their primary endpoints in two phase 3 GAD trials.[24][25] The drug is not approved; the company expects to file a New Drug Application in the first half of 2027.[26] The anxiety research and policy tracker follows these results.

    Next in the crash course

    Mental health

    Panic disorder

    Panic disorder means repeated, unexpected panic attacks and fear of the next one. Symptoms, how common it is, and what NICE and NIMH say about treatment.

    More in Mental health

    Questions readers ask

    What are the symptoms of generalized anxiety disorder?

    NIMH lists excessive worry about everyday things, trouble controlling worry, irritability, restlessness, trouble concentrating, sleep problems or fatigue, and aches such as headaches or muscle tension.[6]

    How is GAD diagnosed?

    NIMH says diagnosis requires difficulty controlling worry on most days for at least 6 months, plus at least three symptoms such as restlessness, fatigue, poor concentration, irritability, muscle tension or sleep problems. A clinician may also check for physical causes.[9][11]

    What causes GAD?

    NIMH says the exact cause is unknown. GAD can run in families, and research points to a mix of genetics, brain chemistry, biology and environment.[8]

    How is GAD treated?

    NICE recommends stepped care, starting with low-intensity help such as guided self-help. If more is needed, it offers CBT or applied relaxation, or an SSRI, based on the person's preference. Treatment decisions should be made with a clinician.[27][18][3][19][4]

    Are there new drugs for GAD?

    In 2026 Definium Therapeutics reported positive phase 3 results for DT120, a single-dose LSD-based tablet, and plans to file for FDA approval in the first half of 2027. It is not approved.[24][25][26]

    Sources

    · 27 claims from 11 publishers

    Each numbered claim is a statement we checked against the sources listed with it. Tap a number in the text to see its sources in place.

    1. [1]

      NIMH describes generalized anxiety disorder as worrying more often or more intensely than others about everyday things, even when the worry is out of proportion to the situation, and says the feelings can last for months or years. confirmedas of 2026-10-11

    2. [2]

      NIMH estimates that 2.7% of US adults had generalized anxiety disorder in the past year and 5.7% experience it at some time in their lives, based on 2001-2003 survey data. confirmedas of 2026-10-11

    3. [3]

      For GAD with marked functional impairment or no response to low-intensity help, NICE recommends offering either a high-intensity psychological intervention or drug treatment, based on preference, because there is no evidence either is better. confirmedas of 2026-10-11

    4. [4]

      NICE recommends that people with GAD who choose drug treatment be offered an SSRI, considering sertraline first because it is the most cost-effective; if it does not work, an alternative SSRI or an SNRI. confirmedas of 2026-10-11

    5. [5]

      WHO lists several kinds of anxiety disorder, including generalized anxiety disorder, panic disorder, social anxiety disorder, agoraphobia, separation anxiety disorder, specific phobias and selective mutism. confirmedas of 2026-09-15

    6. [6]

      NIMH lists signs of GAD including excessive worry about everyday things, trouble controlling worry, irritability, restlessness, trouble concentrating, sleep problems or fatigue, and aches such as headaches or muscle tension. confirmedas of 2026-10-11

    7. [7]

      NIMH says GAD develops gradually and usually starts in early adulthood, and that women are more likely than men to experience it. confirmedas of 2026-10-11

    8. [8]

      NIMH says GAD may run in families but its exact cause is unknown, and that research suggests it results from a mix of genetics, brain chemistry, biology and environment. confirmedas of 2026-10-11

    9. [9]

      NIMH says a GAD diagnosis requires difficulty controlling worry on most days for at least 6 months, plus at least three symptoms such as restlessness, fatigue, trouble concentrating, irritability, muscle tension or sleep problems. confirmedas of 2026-10-11

    10. [10]

      The NHS says a GP may diagnose GAD if someone often worries about a wide range of things, the anxiety affects daily life and is hard to control, and they have felt anxious a lot of the time for at least 6 months. confirmedas of 2026-10-11

    11. [11]

      NIMH says a provider may do a physical exam to make sure an unrelated physical problem is not causing anxiety symptoms. confirmedas of 2026-10-11

    12. [12]

      The GAD-7 is a 7-item self-report anxiety scale developed in a 2004-2005 study in 15 US primary care clinics, where its best cut point had 89% sensitivity and 82% specificity for GAD against interviews by mental health professionals. confirmedas of 2006-05-22

    13. [13]

      The GAD-7's developers concluded it is a valid and efficient tool for screening for GAD and assessing its severity in clinical practice and research. confirmedas of 2006-05-22

    14. [14]

      In a final recommendation dated 20 June 2023, the USPSTF recommended screening for anxiety disorders in adults aged 64 or younger, including pregnant and postpartum people (grade B); it was a new recommendation. confirmedas of 2023-06-20

    15. [15]

      The USPSTF found the GAD-2 and GAD-7 were the most commonly studied anxiety screening instruments and showed adequate sensitivity and specificity for generalized anxiety disorder, with limited evidence for other tools and other anxiety disorders. confirmedas of 2023-06-20

    16. [16]

      The USPSTF says people who screen positive for anxiety should be evaluated further for diagnosis and, if appropriate, provided or referred for evidence-based care. confirmedas of 2023-06-20

    17. [17]

      Among US adults with generalized anxiety disorder in the past year, NIMH estimates 32.3% had serious impairment, 44.6% moderate and 23.1% mild. confirmedas of 2026-10-11

    18. [18]

      For GAD that has not improved after education and active monitoring, NICE recommends offering low-intensity psychological interventions as first line, guided by the person's preference - non-facilitated self-help, guided self-help or psychoeducational groups. confirmedas of 2026-10-11

    19. [19]

      NICE recommends that people with GAD who choose a high-intensity psychological intervention be offered CBT or applied relaxation, usually 12 to 15 weekly one-hour sessions delivered by trained practitioners. confirmedas of 2026-10-11

    20. [20]

      NICE says pregabalin can be considered for GAD if a person cannot tolerate SSRIs or SNRIs, noting it has been a Class C controlled substance in the UK since April 2019. confirmedas of 2026-10-11

    21. [21]

      NICE says not to offer a benzodiazepine for GAD in primary or secondary care except as a short-term measure during crises, and not to offer an antipsychotic for GAD in primary care. confirmedas of 2026-10-11

    22. [22]

      In September 2024 the FDA cleared Big Health's DaylightRx, a prescription app delivering CBT, as the first FDA-cleared digital treatment for generalized anxiety disorder, for adults aged 22 and older as an adjunct to usual care. confirmedas of 2024-09-05

    23. [23]

      A 2019 Lancet network meta-analysis of 89 trials (25,441 adult outpatients with GAD) found duloxetine, pregabalin, venlafaxine and escitalopram more effective than placebo with relatively good acceptability. confirmedas of 2019-02-23

    24. [24]

      Definium Therapeutics reported on 12 August 2026 that its first phase 3 GAD trial, Voyage (107 participants per arm), met its primary endpoint - a single 100 µg dose of DT120 reduced HAM-A anxiety scores by 11.6 points at week 12 versus 6.2 on placebo, a 5.4-point difference. reportedas of 2026-08-12

    25. [25]

      Definium reported on 14 September 2026 that its second phase 3 GAD trial, Panorama (245 participants), met its primary endpoint - a single 100 µg dose of DT120 reduced HAM-A scores by 9.8 points at week 12 versus 4.7 on placebo, a 5.1-point difference. confirmedas of 2026-09-14

    26. [26]

      Definium said in September 2026 that a pre-NDA meeting with the FDA was scheduled for the fourth quarter of 2026 and that it anticipated filing a New Drug Application in the first half of 2027. confirmedas of 2026-09-14

    27. [27]

      NICE guideline CG113 tells clinicians to follow a stepped-care model for GAD, offering the least intrusive, most effective intervention first. confirmedas of 2026-10-11

    Revision history (1)
    1. Page created.

    Created Oct 11, 2026. Last reviewed by an editor on Oct 11, 2026. Next scheduled review: Jan 11, 2027.

    Cite this page

    "Generalized anxiety disorder (GAD)." ContentLora, updated Oct 11, 2026. https://contentlora.com/wiki/generalized-anxiety-disorder

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