I think this is the challenge of being a psychiatrist. Why? Because even though we have evidence for a lot of things, even for current medications, they might not necessarily work for individual patients. That's why we follow the guidelines made by a majority or a body of psychiatrists who have done enough research on it. We follow the first-line treatments and the second-line treatments, how we switch, how we add on different medications, and, if that's not working, what we do next.
When we face treatment-resistant depression or PTSD, we have to be innovative. We have to be adventurous. In that case, I'm not opposed to or against using CBD oil or using marijuana to help if we can relieve the pain or relieve the stress a patient has after we've tried everything. However, I strongly disagree with the jump to using marijuana as a first treatment without trying everything we already know, because that is dangerous. It will also lead to more troubles than those we're actually try to solve.
There's always a balance. There's always an exception. I do the same thing when we try a medication that has never really been used. It needs to be based on a full understanding between patients and physicians.