Overview

Anxiolytics, often called antianxiety agents, are substances used to reduce excessive anxiety and to treat anxiety disorders. They range from fast-acting sedatives to longer-term antidepressants with anxiolytic effects. For general information about commonly prescribed drugs and their mechanisms, consult clinical references. Definitions and diagnostic criteria for anxiety disorders are available in standard psychiatric sources about anxiety.

Major classes and characteristics

Several pharmacological classes are used to treat anxiety. Each class differs in onset, mechanism, and typical clinical role:

  • Benzodiazepines — provide rapid relief of acute anxiety but can cause sedation, tolerance, and dependence; often used short-term or for severe panic symptoms. See discussions of benzodiazepines.
  • Selective serotonin reuptake inhibitors (SSRIs) — antidepressants with anxiolytic benefits that are commonly preferred for chronic management and prevention of relapse; they typically require weeks to reach full effect. See SSRIs.
  • Azapirones — exemplified by buspirone, they act on serotonin receptors and are used for generalized anxiety disorder with less sedative liability.
  • Barbiturates — historically used as sedatives and anxiolytics but largely replaced because of overdose risk and dependence; historical context available at barbiturate resources.
  • Antihistamines and other agents — e.g., hydroxyzine, and certain anticonvulsant or analgesic drugs such as pregabalin are sometimes used for anxiety in specific situations.
  • Herbal preparations — some plants, including traditional remedies, have been used for anxiety; evidence varies by preparation and study quality. See more on botanical approaches at plant-based remedies.

History and development

The treatment of anxiety has evolved from sedative compounds and early barbiturates in the early 20th century to benzodiazepines introduced in the mid-20th century and to modern antidepressants and other agents developed later. Shifts in prescribing reflect changing knowledge about safety, dependence, and long-term outcomes. Regulatory frameworks now generally require many anxiolytics to be available only by prescription.

Clinical use, benefits, and risks

Anxiolytics are used to treat a range of conditions, including generalized anxiety disorder, panic disorder, social anxiety, and situational anxiety. Choice of treatment depends on symptom severity, onset speed required, comorbid conditions, and risk factors. Common considerations include side effects such as sedation, cognitive impairment, gastrointestinal effects, and the potential for misuse or withdrawal with certain drugs.

Nonpharmacological treatments and combined care

Psychological therapies are cornerstone treatments for many anxiety disorders; cognitive-behavioral therapy (CBT) and related approaches have strong evidence. Other modalities — exposure therapy, mindfulness, relaxation training, and lifestyle measures — may be used alone or in combination with medication. For guidance on therapeutic approaches, see resources about therapy.

Notable distinctions and practical points

Key distinctions include short-acting versus long-acting agents, treatments aimed at immediate symptom relief versus preventive management, and pharmacological versus nonpharmacological strategies. Decisions about treatment should be individualized, weighing benefits, risks, patient preferences, and available evidence. Patients and clinicians commonly monitor response, side effects, and functional improvement when using anxiolytic interventions.