Table 1.

Codes for manual characterization, their definitions. Examples are provided in Table A3 of the Supplementary material.

Code	Definition
Non-Opioid Treatment of POW	Discussion of use of kratom, LSD, loperamide, ondansetron, mushrooms, clonidine to manage withdrawal symptoms
Avoidance and Fear of POW	Discussion of how precipitated withdrawal might be worse then regular withdrawal
Buprenorphine dosing Strategies	Discussion specific milligram and frequency of Buprenorphine doses
Specific Triggers of POW	Discussion of specific experiences of POW, for example having POW X amount of hours after last use
Personal Experience with buprenorphine microdosing strategies	Discussion of positive or negative experiences with microdosing, beyond specific recommendations for dosages
Experience of Opioid Use Disorder	Discussion of use of fentanyl, heroin, oral opioids, prior remission of OUD
Buprenorphine pharmacology	Discussion of buprenorphine pharmacology such as partial agonist activity and naloxone component of suboxone
Fentanyl Pharmacology	Discussion of fentanyl pharmacology such as lipophilicity and length of action
Other/none of the above	Posts that cannot be categorized into any of the above themes