Were self-described introverts "immune" to increased drug use and entrapment during the pandemic?

•Most people, but not all, had increased feelings of entrapment during the pandemic.•Decreased entrapment was associated with decreased alcohol and opioid use.•Satisfying social activity, even in small amounts, had apparent protective effects.•Self-described introverts reported more negative affect and unsatisfying activity.•Countering a media narrative, introverts were not more likely to thrive in lockdown.