That's a very important question. Cannabis affects on anxiety is somewhat indeterminate, whether it be within the context of PTSD or independent of that: generalized anxiety, panic anxiety, etc.
The preponderance of the studies has been not well-done one-time assessments, what we call cross-sectional, but generally those have been somewhat mixed. There are very few prospective studies whether of THC cannabis or CBD-rich cannabis. I think that's where we await the results of properly done clinical trials. Again, it's somewhat indeterminate, and what I worry a little about are anecdotal reports that might get overblown. That's why we need to do rigorous evidence-based studies. Whether it's academic investigators in universities or licensed producers, someone has to do this research and do it with rigour and transparency. Then we'll know the truth.
It has great potential, but let's get the facts behind it or not.