Objective
This study investigated trends in the study of phytochemical treatment of post-traumatic stress disorder (PTSD).

Methods
The Web of Science database (2007–2022) was searched using the search terms “phytochemicals” and “PTSD,” and relevant literature was compiled. Network clustering co-occurrence analysis and qualitative narrative review were conducted.

Results
Three hundred and one articles were included in the analysis of published research, which has surged since 2015 with nearly half of all relevant articles coming from North America. The category is dominated by neuroscience and neurology, with two journals, Addictive Behaviors and Drug and Alcohol Dependence, publishing the greatest number of papers on these topics. Most studies focused on psychedelic intervention for PTSD. Three timelines show an “ebb and flow” phenomenon between “substance use/marijuana abuse” and “psychedelic medicine/medicinal cannabis.” Other phytochemicals account for a small proportion of the research and focus on topics like neurosteroid turnover, serotonin levels, and brain-derived neurotrophic factor expression.

Conclusion
Research on phytochemicals and PTSD is unevenly distributed across countries/regions, disciplines, and journals. Since 2015, the research paradigm shifted to constitute the mainstream of psychedelic research thus far, leading to the exploration of botanical active ingredients and molecular mechanisms. Other studies focus on anti-oxidative stress and anti-inflammation.

Key words: Phytochemical, Post-traumatic stress disorder, Text analysis, Clustering co-occurrence network, Psychedelic