basics

Cannabis and Anxiety: What the Research Says

Cannabis is widely used for anxiety, but the relationship is complex. High THC can worsen anxiety for some people. Here's what to know.

By DCWeedHub Editorial · Published · Updated

Cannabis and Anxiety: What the Research Says

Short answer: The research on cannabis and anxiety is limited and points in both directions. The National Academies found limited evidence that CBD improved anxiety symptoms on a public-speaking test in people with social anxiety disorder. It also found moderate evidence linking regular cannabis use to a higher incidence of social anxiety disorder (NASEM 2017). NIDA lists anxiety and panic among THC's short-term effects, especially at high doses (NIDA). Cannabis is not an approved treatment for any anxiety disorder. This page summarizes the research. It makes no health claims and recommends no product.

If you're dealing with anxiety, talk to a healthcare provider. NIMH has information on anxiety disorders and how to find help (NIMH).

What the National Academies concluded

In 2017, the National Academies of Sciences, Engineering, and Medicine (NASEM) published a major review of cannabis health research. Its conclusions on anxiety (NASEM committee conclusions):

  • Limited evidence that cannabidiol is effective for "improving anxiety symptoms, as assessed by a public speaking test, in individuals with social anxiety disorders."
  • Moderate evidence of a statistical association between regular cannabis use and "increased incidence of social anxiety disorder."
  • Limited evidence of an association between cannabis use and the development of other anxiety disorders, and between near-daily use and increased anxiety symptoms.
  • Moderate evidence that anxiety is not a risk factor for developing problem cannabis use.

A statistical association doesn't prove cause in either direction. NASEM's evidence grades ("limited," "moderate") are about how strong the research is, not how big any effect is.

What NIH's complementary health center says

NCCIH summarizes the evidence as a "small amount" from human studies suggesting cannabis or cannabinoids "might help to reduce anxiety." It cites one study of 24 people with social anxiety disorder who reported less anxiety on a simulated public-speaking test after CBD than after placebo. It also cites four studies in people with chronic pain, who didn't necessarily have anxiety disorders (NCCIH). That's a small evidence base, and it doesn't cover the products sold in dispensaries.

THC and anxiety: the documented risk

NIDA lists anxiety, fear and panic among THC's possible short-term effects. It says they're more common when people take too much, use a very potent product or are inexperienced (NIDA).

Potency matters here. NIDA notes that dispensary flower and concentrates can exceed 40% THC (NIDA). Oral products take longer to start working than inhaled ones, which can lead people to take more than they intended (see consumption methods and the start-low dosing guide).

Other safety points from federal sources

  • NCCIH lists cannabis use disorder, a higher risk of motor-vehicle crashes, and a link between frequent use and psychosis among its safety concerns (NCCIH).
  • CBD can interact with other medicines (NCCIH). If you take anything for anxiety or mood, ask your prescriber or pharmacist before using cannabis.
  • The FDA has not approved cannabis for any anxiety condition (NCCIH).

How to read cannabis research headlines

A few questions help when a product page, social post or news story cites "studies":

  • What was tested? Many studies used a pharmaceutical product (such as nabiximols, dronabinol or purified CBD) at a set dose. The findings don't automatically apply to flower, vapes or edibles sold in dispensaries.
  • Who was studied? Results in people with a specific diagnosis don't necessarily carry over to anyone else.
  • How strong is the evidence? NASEM graded each conclusion from "conclusive" through "substantial," "moderate" and "limited" to "no or insufficient," based on the quality and amount of research (NASEM 2017).
  • Is it an association or a trial? An association between two things doesn't show that one caused the other.

What we don't know

  • How many DC patients use cannabis for anxiety is UNKNOWN. ABCA doesn't publish reasons for use, and we haven't found a DC survey that measures it.
  • Whether research on specific products like CBD or nabiximols applies to dispensary products is UNKNOWN. Most studies didn't test them.

In DC

DC's licensed market is medical. Adults 21+ can self-certify with ABCA, and licensed products are lab-tested (how to read a COA). To buy legally, register first: start your ABCA registration. Then use the licensed dispensary directory.

Buy only from ABCA-licensed retailers. ABCA publishes the list of operational stores (ABCA), and our guide shows how to check a license. Unlicensed products haven't gone through DC's required lab testing (D.C. Code § 7-1671.05).

Frequently asked questions

Does cannabis help with anxiety?

The evidence is limited. NASEM found limited evidence for CBD on one public-speaking test in social anxiety disorder, and moderate evidence linking regular cannabis use to more social anxiety disorder (NASEM 2017). Cannabis is not an approved anxiety treatment.

Can THC cause anxiety?

NIDA lists anxiety, fear and panic among THC's short-term effects. It says they're more common with large amounts, high-THC products or little experience (NIDA).

Is CBD FDA-approved for anxiety?

No. The only FDA-approved CBD drug, Epidiolex, is approved for seizures in two rare epilepsy syndromes (NCCIH).

Where can I get help for anxiety?

Start with a healthcare provider. NIMH lists resources for finding help (NIMH).

Can CBD interact with medications?

Yes, it can. NCCIH notes CBD can interact with other medicines. Ask a prescriber or pharmacist first (NCCIH).

Keep reading

Sources

Last updated: October 26, 2026. Educational information only, not medical advice. Cannabis is not a treatment for anxiety disorders. 21+.