Table 2:

Drug subreddits included for keyword monitoring, categorized by name and discussion topic.

Category	Subreddit Names
Drug-Specific	r/1P_LSD, r/2cb, r/4acodmt, r/adderall, r/afinil, r/ambien, r/AMT, r/Ayahuasca, r/cocaine, r/cripplingalcoholism, r/DMT, r/DPH, r/dxm, r/fentanyl, r/ketamine, r/kratom, r/LSA, r/LSD, r/MDMA, r/MemantineHCl, r/mescaline, r/meth, r/PCP, r/phenibut, r/PsilocybinMushrooms, r/Salvia, r/shroomers, r/shrooms
Drug Class-Specific	r/benzodiazepines, r/dissociatives, r/DissonautUniverse, r/gabagoodness, r/microdosing, r/noids, r/opiates, r/Opioid_RCs, r/PsychedelicMessages, r/Psychedelics, r/PsychedSubstance, r/Psychonaut, r/RationalPsychonaut, r/Stims, r/treedibles, r/trees, r/tryptonaut
Other/General Discussion	r/AnAnswerToHeal, r/AskDrugNerds, r/askdrugs, r/aves, r/bestoferowid, r/CurrentlyTripping, r/druganalytics, r/druggardening, r/DrugNerds, r/Drugs, r/DrugShowerThoughts, r/DrugsOver30, r/erowid, r/ObscureDrugs, r/ReagentTesting, r/researchchemicals, r/samelevel, r/TheDrugClassroom, r/TheeHive, r/tripreports, r/TripSit, r/TripTales