dullness

The fifth Buddhist precept is to refrain from intoxicants. Historically this means no alcohol. But a modern interpretationFrom NameRedacted. is to avoid intentional mental dullness.

This is both narrower and broader. Drugs that don't induce dullness, like stimulants, entheogens, or entactogens, can be okay. And even drinking can be okay, if the intent is something like connection rather than escapism. But non-drug escapism, like getting lost in a social media feed, would be against the precept.