I agree with CANDC that there have not been enough studies about marijuana. Historically, because of a law passed by Congress in 1970 (The
Federal Comprehensive Drug Abuse Prevention and Control Act of 1970, The Federal Controlled Substances Act: Schedules and Pharmacy Registration), pot was classified as a Schedule 1 drug (High abuse potential with no accepted medical use; medications within this schedule may not be prescribed, dispensed, or administered) making it harder for companies and institutions to study. Though, recently, more studies have been done and I have seen doctor's testify (to legislatures and in TV shows) about how effectively it treats seizures and nausea caused by many types of chemotherapy. I also recall seeing a show about it effectively treating PTSD. IMO, some types of anxiety might be caused by PTSD but not all but I am definitely no expert on this. I have also seen many people say that perhaps pot might cause schizophrenia (an important topic). This video which looked at the research (Does Marijuana Cause Schizophrenia? - YouTube) concludes that their might be a correlation but that only about 2.5 percent of pot users have schizophrenia verses 15 percent of people who smoke tobacco going on to develop cancer. However, perhaps we should keep in mind when looking at this comparison that cancer is much more prevalent than schizophrenia (this is my opinion, I don't know but IMO it might worsen it). Again, IMO, more studies need to be done.

I know more than one person with a medical marijuana card and I have tried pot (infrequently) but am not currently using. The regular user has studied the strains (the medical pot sold comes from less than 2 dozen strains, I can't remember the number he cited) combined in various ways. He believes some strains help with anxiety, The thing is that, IMO, pot is a natural product and is never exactly the same in the way that some years for wine are better than other years. There are hundreds of natural compounds in plants. But, his conclusion is that, in a rough way, you can use the strains the pot is derived from plus the THC vs CBD percentages plus the terpene profile in the pot--note all these things, how they effect you and then over time make an educated guess about which types of pot will help and which will worsen your anxiety.

I have had experiences with it relaxing me and I have had experiences with it worsening my anxiety. However, the main reason I now avoid it is that I have found myself "double-thinking" when I use. It is like I get this voice casting doubts on what I believe. It doesn't change my beliefs but I do find the internal arguments going on in my head quite unwelcome. It also makes me lazy but IMO this can be managed effectively by only using a small amount right before bedtime. For me, it is a shame that pot causes the bothersome "double-think" because it seemed to help with sleep (some strains) and pain so I have personally made the decision to only use if I get an extreme amount of pain (I currently only have very minor aches and pains which I can handle OK without meds). And I assume it effects people differently and do believe there are legitimate reasons to use. Hope this isn't TMI.