<p>I've had several patients who asserted that marijuana use improves their anxiety or depressive symptoms. Some report an increase in motivation. I'm not aware of any evidence that cannabis is safe and effective for depression, but I wouldn't rule out the possibility that some subset of patients might benefit from it's use. </p>

CC BY-SA 3.0
2016-06-22T18:19:23.993Z
This is a scientific site of the SE network and answers need to be backed up by citations, references and sources to allow other users to background read on your answer and verify your statements. Although interesting, your answer is an anecdote and would be more appropriate as a comment.
AliceD
CC BY-SA 3.0
2016-06-23T09:00:33.160Z
You could post this as a comment, it would be quite suitable. (I can no longer convert it since you removed this post.)
Steven Jeuris
CC BY-SA 3.0
2016-08-16T20:12:50.003Z
I'm not sure how to convert it, but it's undeleted!
BitShrink
CC BY-SA 3.0
2016-06-22T17:57:17.563Z
2016-06-22T17:57:17.563Z
BitShrink
<p>Question 1: I am unaware of any studies directly addressing the epidemiology of self-medication with cannabis in cases of treatment-resistant depression (it seems like that is what you are asking about). However, there are several lines of therapy that have demonstrated effectiveness in depression beyond the first line antidepressants <a href="http://www.canmat.org/guides.php" rel="nofollow">(CANMAT Depression Guidelines)</a>. None of these include marijuana or cannabinoids.</p>

<p>Question 2: There is (to my knowledge) absolutely no evidence that marijuana is an effective treatment for depression. The article by Volkow et al. (2014) although titled "Adverse Effects," also reviews conditions for which evidence of effectiveness exists for <em>symptomatic</em> treatment with marijuana or cannabinoids. These conditions include glaucoma, nausea, AIDS-associated anorexia and wasting syndrome, chronic pain, inflammation, multiple sclerosis, and epilepsy (Volkow et al. 2014). That being said, the quality of that evidence is unclear to me. </p>

<p>It must also be mentioned that studies will generally be limited by heterogeneous cannabinoid content in the active compound. Not all cannabinoids are created equal, and from what I understand one of the potentially most medically useful cannabinoids is cannabidiol (CBD; Curran et al., 2016); THC and CBD may have opposing effects, with THC generally associated with <em>impairments</em> across several psychological functions (Curran et al. 2016). On the other hand, small studies have suggested a potential role for CBD (but <strong>not</strong> THC) in augmenting psychotherapeutic treatment of some anxiety disorders. The evidence thus far seems to suggest that marijuana would not have a role in treatment of psychiatric disorders in general, let alone depression, but that further research about the effects of isolated CBD might be warranted.</p>

<h2>Reference</h2>

<ol>
<li>Volkow, N. D., et al. (2014). Adverse Health Effects of Marijuana Use. <em>New England Journal of Medicine</em>, 370(23), 2219–2227.    </li>
<li>Curran, H. V, Freeman, T, P., Mokrysz, C., Lewis D, A., Morgan, C, J, A., &amp; Parsons, L. H. (2016). Keep off the grass? Cannabis, cognition and addiction. <em>Nature Reviews Neuroscience</em>, 17(5), 293–306.   </li>
<li>Baldwin, D. S., Anderson, I. M., Nutt, D. J., Allgulander, C., Bandelow, B., den Boer, J. a, … Wittchen, H.-U. (2014). Evidence-based pharmacological treatment of anxiety disorders, post-traumatic stress disorder and obsessive-compulsive disorder: a revision of the 2005 guidelines from the British Association for Psychopharmacology. Journal of Psychopharmacology (Oxford, England), 28, 403–39.  </li>
</ol>

CC BY-SA 3.0
2016-06-19T00:17:58.840Z
2016-06-19T00:17:58.840Z
Abraham Nunes
<p>How common is it for patients diagnosed with depression to self-prescribe themselves marijuana after trying prescription anti-depressants? Is there any evidence that this self-treatment is effective or satisfies some need that is not filled with typical prescription medication?</p>

<abnormal-psychology><clinical-psychology><psychopharmacology>
What is the effectiveness of self-prescribed marijuana for depression?
Seanny123
# What is the effectiveness of self-prescribed marijuana for depression?

(Asked by: username_0 on 2016-01-22)

How common is it for patients diagnosed with depression to self-prescribe themselves marijuana after trying prescription anti-depressants? Is there any evidence that this self-treatment is effective or satisfies some need that is not filled with typical prescription medication?

**Tags:** abnormal-psychology, clinical-psychology, psychopharmacology


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## 2 answers

### Answer by username_4 on 2016-06-19. Score: 4 | Accepted answer

Question 1: I am unaware of any studies directly addressing the epidemiology of self-medication with cannabis in cases of treatment-resistant depression (it seems like that is what you are asking about). However, there are several lines of therapy that have demonstrated effectiveness in depression beyond the first line antidepressants [(CANMAT Depression Guidelines)](http://www.canmat.org/guides.php). None of these include marijuana or cannabinoids.

Question 2: There is (to my knowledge) absolutely no evidence that marijuana is an effective treatment for depression. The article by Volkow et al. (2014) although titled "Adverse Effects," also reviews conditions for which evidence of effectiveness exists for *symptomatic* treatment with marijuana or cannabinoids. These conditions include glaucoma, nausea, AIDS-associated anorexia and wasting syndrome, chronic pain, inflammation, multiple sclerosis, and epilepsy (Volkow et al. 2014). That being said, the quality of that evidence is unclear to me.

It must also be mentioned that studies will generally be limited by heterogeneous cannabinoid content in the active compound. Not all cannabinoids are created equal, and from what I understand one of the potentially most medically useful cannabinoids is cannabidiol (CBD; Curran et al., 2016); THC and CBD may have opposing effects, with THC generally associated with *impairments* across several psychological functions (Curran et al. 2016). On the other hand, small studies have suggested a potential role for CBD (but **not** THC) in augmenting psychotherapeutic treatment of some anxiety disorders. The evidence thus far seems to suggest that marijuana would not have a role in treatment of psychiatric disorders in general, let alone depression, but that further research about the effects of isolated CBD might be warranted.

## Reference

1. Volkow, N. D., et al. (2014). Adverse Health Effects of Marijuana Use. *New England Journal of Medicine*, 370(23), 2219–2227.
2. Curran, H. V, Freeman, T, P., Mokrysz, C., Lewis D, A., Morgan, C, J, A., & Parsons, L. H. (2016). Keep off the grass? Cannabis, cognition and addiction. *Nature Reviews Neuroscience*, 17(5), 293–306.
3. Baldwin, D. S., Anderson, I. M., Nutt, D. J., Allgulander, C., Bandelow, B., den Boer, J. a, … Wittchen, H.-U. (2014). Evidence-based pharmacological treatment of anxiety disorders, post-traumatic stress disorder and obsessive-compulsive disorder: a revision of the 2005 guidelines from the British Association for Psychopharmacology. Journal of Psychopharmacology (Oxford, England), 28, 403–39.


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### Answer by username_1 on 2016-06-22. Score: 1

I've had several patients who asserted that marijuana use improves their anxiety or depressive symptoms. Some report an increase in motivation. I'm not aware of any evidence that cannabis is safe and effective for depression, but I wouldn't rule out the possibility that some subset of patients might benefit from it's use.

> **Comments:**
> **username_2**: This is a scientific site of the SE network and answers need to be backed up by citations, references and sources to allow other users to background read on your answer and verify your statements. Although interesting, your answer is an anecdote and would be more appropriate as a comment.  
> **username_3**: You could post this as a comment, it would be quite suitable. (I can no longer convert it since you removed this post.)  
> **username_1**: I'm not sure how to convert it, but it's undeleted!  

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