Table 4.

Topics from subreddits based on alcohol, cannabis, and opioids. Note: “WD” in O1 is an acronym used by the community for withdrawal.

Substance	Top keywords (ordered in decreasing order of importance to topic)
Alcohol
A0 – Drinking as a Problem	drink, alcoholic, drinking, alcohol, problem, quit, start, weekend, friend, month, drinker, control, drunk, social, bad
A1 – The Journey to Sobriety	life, sober, help, meeting, aa, alcohol, sobriety, love, month, friend, change, alcoholic, live, lose, start
A2 – Shame and Feeling Down Due to Drinking	feel, today, sober, shame, wake, feeling, bad, anxiety, sick, relapse, ashamed, dream, weak, guilt, drink
A3 – Alcohol and Social Interactions (Contextual Factors)	night, beer, wine, bottle, drunk, wake, glass, morning, friend, sleep, buy, house, remember, wife, hour
Cannabis
M0 – Living Life without Weed	life, weed, high, love, job, sober, drug, live, change, start, addiction, fuck, help, money, addict
M1 – First Steps after Relapsing	feel, dream, sleep, night, today, relapse, wake, bad, weak, anxiety, sober, eat, feeling, high, shit
M2 – Dealing with Others that Smoke (Contextual Factors)	smoke, friend, weed, smoking, start, stoner, joint, high, month, school, everyday, night, weekend, hang, daily
M3 – How to Quit	quit, weed, help, month, smoking, anxiety, addict, depression, hard, daily, start, long, advice, ago, withdrawal
Opioids
O0 – Feeling Terrible	feel, clean, fuck, life, shit, month, fucking, today, bad, start, relapse, dope, ago, high, guy
O1 – How to Deal with Withdrawal	kratom, withdrawal, suboxone, taper, dose, help, wd, quit, oxy, methadone, start, bad, cold, symptom, month
O2 – Addiction and Relationships with Others	addict, addiction, help, drug, recovery, love, life, heroin, family, friend, support, rehab, clean, live, struggle
O3 – Pain Management	pain, doctor, med, withdrawal, pill, feel, surgery, chronic, tramadol, oxycodone, medication, bad, prescribe, anxiety, help