Fig. 2
From: Signals of increasing co-use of stimulants and opioids from online drug forum data
Proportions of Redditors who posted about specific opioid and opioid-related medication and stimulant pairs (e.g., opioid i and stimulant j) among all Redditors who posted about each specific opioid or opioid-related medication (e.g., opioid i). Opioids, opioid-related medication, and stimulants are grouped as described in “Opioid and stimulant co-use trends” section. Total number of Redditors who mentioned at least one opioid = 9329. Total number of Redditors who mentioned at least 1 stimulant = 9151