Table 1. A summary of search strategies used in PubMed, PubMed Central, Google Scholar, and ScienceDirect.

Database	Keywords	Search strategy	Filters used	Results
PubMed	attention deficit hyperactivity disorder, attention deficit disorder with hyperactivity, marijuana, cannabidiol, thc	((("attention deficit hyperactivity disorder"[All Fields] OR ("attention deficit disorder with hyperactivity"[MeSH Terms] OR ("attention"[All Fields] AND "deficit"[All Fields] AND "disorder"[All Fields] AND "hyperactivity"[All Fields]) OR "attention deficit disorder with hyperactivity"[All Fields] OR "adhd"[All Fields])) AND ("attention deficit disorder with hyperactivity/cerebrospinal fluid"[MeSH Major Topic] OR "attention deficit disorder with hyperactivity/chemically induced"[MeSH Major Topic] OR "attention deficit disorder with hyperactivity/epidemiology"[MeSH Major Topic] OR "attention deficit disorder with hyperactivity/etiology"[MeSHMajor Topic] OR "attention deficit disorder with hyperactivity/genetics"[MeSH Major Topic] OR "attention deficit disorder with hyperactivity/metabolism"[MeSH Major Topic] OR "attention deficit disorder with hyperactivity/psychology"[MeSH Major Topic])) OR "attention deficit hyperactivity disorder"[All Fields]) AND ("2013/01/10 00:00":"3000/01/01 05:00"[Date - Publication] AND "loattrfree full text"[Filter] AND "humans"[MeSHTerms] AND "english"[Language]) AND (((("cannabis"[MeSH Terms] OR "cannabis"[All Fields] OR "cannabi"[All Fields] OR "cannabis s"[All Fields]) AND ("cannabis/adverse effects"[MeSH Major Topic] OR "cannabis/drug effects"[MeSH Major Topic] OR "cannabis/genetics"[MeSH Major Topic] OR "cannabis/physiology"[MeSH Major Topic] OR "cannabis/toxicity"[MeSH Major Topic])) OR ("cannabis"[MeSH Terms] OR "cannabis"[All Fields] OR "marijuana"[All Fields] OR "marijuana s"[All Fields]) OR ("cannabidiol"[MeSH Terms] OR "cannabidiol"[All Fields] OR "cannabidiolic"[All Fields]) OR ("dronabinol"[MeSH Terms] OR "dronabinol"[All Fields] OR "thc"[All Fields])) AND ("2013/01/10 00:00":"3000/01/01 05:00"[Date - Publication] AND "loattrfree full text"[Filter] AND "humans"[MeSHTerms] AND "english"[Language]))	Published between 2012-2023. Full-text articles, Human studies only, English language and papers translated to English.	59
PubMed Central	Adhd and cannabis		Articles published in last ten years.	12
Google Scholar	Adhd and cannabis		Articles published between 2012 and 2023.	29
Science Direct	Adhd and cannabis		Articles published between 2012 and 2023, review articles, and research articles in neuroscience, psychology, pharmacology, toxicology, and biochemistry, all journals except those in French.	36