Depression and Marijuana: What to Know

Does marijuana help depression? Research so far does not show that it does. A 2019 review of 83 studies, 42 of them on depression, found scarce evidence that cannabinoids improve depressive disorders or symptoms, and CDC reports that cannabis use is associated with depression. Talk with a mental health professional about treatments with evidence behind them.

Can Marijuana Help with Depression?

People have used cannabis as medicine for thousands of years, but modern trials back only a handful of uses, chemotherapy nausea among them, with modest evidence for chronic pain. Some people say it lifts their mood or eases stress, but personal reports are not the same as trial results. Here is what the studies found.

Whether marijuana helps diagnosed depression is not established. The same 2019 review also looked at anxiety and found that pharmaceutical THC eased it only slightly, in people with other illnesses.

Chronic pain and depression often go together, NIMH notes. For pain, NIH describes a small benefit, but that is a pain finding, not a depression one. 

Whether easing pain with cannabis also lifts depression has not been tested in well-controlled trials we could find.

Whatever lies behind someone’s depression, whether pain or another illness, medical marijuana is not a proven treatment for it. Cannabis use is associated with depression and thoughts of suicide, CDC reports, so talk with a mental health professional first.

The Connection Between Pain and Depression

Pain is one of the key factors to take into account with marijuana and depression, because NIMH notes that people with a chronic disease, such as multiple sclerosis or long-term pain, are at a higher risk of developing depression.

Constant pain wears people down, and that strain can make low mood harder to shift. It can make it hard for them to enjoy life or pursue the things that make them happy, and this can make their depression even worse over time. NIMH documents that link, but it does not show that cannabis treats depression; treating both the pain and the depression with your care team comes first.

Medical Marijuana and Depression: What Research Says

If you have a marijuana card, your state’s rules decide what you may buy, but a card is not evidence that cannabis treats depression. Here is what research says about the reasons people with depression give for using it:

• Pain Management: Long-term pain raises the risk of depression, as the section above explains. Cannabinoids gave a small pain benefit in reviews, but we found no trial showing that this relieves depression.
• Stress and Anxiety: NIH calls the evidence that cannabinoids reduce anxiety small, and cannabis use can cause anxiety and paranoia, CDC says. Neither finding shows cannabis eases depression.
• Easing Nausea: For chemotherapy nausea, NIH notes that the FDA has approved the cannabinoid drugs dronabinol and nabilone. Marijuana for nausea in other settings is less studied.

Strain Names and Depression: What Is Known

We found no trial that tested a strain for depression, and a 2022 analysis of commercial cannabis in six U.S. states found strain labels often do not match a product’s chemistry. Strain names people often ask about include:

• Jack Herer 
• Purple OG 
• Cinex 
• Blue Dream 
• Cannatonic 
• Cookies and Cream

Safety Points on Marijuana and Depression

If you have depression and are thinking about marijuana, keep these safety points in mind:

• Know that cannabis can cause anxiety and paranoia, CDC warns. 
• Speak with your mental healthcare provider for advice and guidance. 
• Ask your prescriber before combining cannabis with antidepressants or other medicines.
• If your mood worsens or you have thoughts of suicide, call or text the 988 Suicide & Crisis Lifeline, as NIMH advises. 
• Keep track of how cannabis affects your mood and sleep, and share it with your provider. 
• Avoid drinking alcohol while consuming cannabis. 
• Treat claims that terpenes ease depression with caution; we found no clinical trials supporting them.

So, does marijuana help depression? The evidence does not show that it does: personal reports vary, and the 2019 review of 83 studies found scarce evidence that cannabis treats depression, so treatments with evidence, such as talk therapy and antidepressant medicines, should come first. In Florida, depression is not on the list of qualifying conditions in s. 381.986(2); a qualified physician would have to find, after examining you, that your condition meets the comparable-condition test in s. 381.986(2)(k); that decision is at the physician’s discretion, and certification is never promised. Contact us to find out more.

Last updated October 16, 2026 by the Dr. Green Relief Editorial Team.

Sources

• Black N, et al. Cannabinoids for the treatment of mental disorders and symptoms of mental disorders: a systematic review and meta-analysis. Lancet Psychiatry. 2019
• CDC. Cannabis and Mental Health
• National Cancer Institute. Cannabis and Cannabinoids (PDQ), Health Professional Version
• NCCIH. Cannabis (Marijuana) and Cannabinoids: What You Need To Know
• National Institute of Mental Health. Chronic Illness and Mental Health
• National Institute of Mental Health. Depression
• Smith CJ, et al. The phytochemical diversity of commercial Cannabis in the United States. PLoS One. 2022
• Florida Statutes, s. 381.986, Medical use of marijuana