This question was raised to me recently, and I found some supportive clinical information about CBD and stroke. I found the following article, "Therapeutic Potential of Non-Psychotropic Cannabidiol in Ischemic Stroke", at the US National Library of Medicine, National Institutes of Health. I see this as very good news.
At the end of the article, they write the following conclusion: "In the last 10 years, it has been possible to demonstrate that CBD has the following unique therapeutic profile: 1) a cannabinoid receptor-independent mechanism, 2) long-lasting cerebro- protective effect after ischemic stroke, and lack of development of tolerance. Moreover, CBD has almost no side effects, including psychotropic activity. Preliminary studies highlight the fact that the multifunctional actions of CBD may lead to benefits in more complex systems within the brain after ischemic stroke. CBD offers new therapeutic possibilities for treating ischemic stroke, although further clinical studies are needed to definitively evaluate the clinical values of CBD.
If you would like to read the entire article, here's the link - https://www.ncbi.nlm.nih.gov/pmc/articles/PMC4036658/