Table 3.

Most popular reddit threads for each of the NPS classes identified by the NPSfinder® between January and August 2020.

NPS class	Total threads	Most discussed threads	No. of posts
Opioids	118	“Etazene Taper from Methadone Q's”	70
		“Etazene extinct?”	55
		“Brorphine and Metodesnitazene.”	47
		“Fluonitazene”	35
		“A few Interesting Opioid Molecules I came up with and the respective Swiss Target Prediction”	63
		“which rc opioid?”	38
Cathinones	101	“Raning about A-PCyP”	68
		“a-PCyP: just say no to snorting it”	33
		“MFPVP/mf-pvp/3m-4f-pvp REPORT”	30
		“MDPEP (as known as MD-PV8) turns out do be a good replacement cathinone in terms of duration & effects similar to MDPV or MDPHP”	22
PCP-like	21	“3-F-PCP and World Domination—Phase Two Underway”	91
		“New Stuff's comin'-−3-F-PCP,”	81
		“3-chloro-pcp! it's really nice!”	50
		“My Initial Impressions of 3-CL-PCP”	32
Psychedelics	10	“1F-LSD 100 mcg (A New Lysergamide)—First Trip Report”	129
		“1F-LSD (150 μg sublingual): Novel lysergamide report”	80
Synthetic cannabinoids	5	“5-Bromo-DMT and 5-Chloro-DMT coming soon I think”	34
		“Warning 4F-MDMB-BICA caused 11 deaths in Hungary”	120
		“4f mdmb bica super potent”	16

The threads can be found in the following subreddits: “r/Researchchemical,” “r/opiods.RCS,” “r/stims,” “r/noids,” and “r/dissociatives”.