the.com/nocebo

The placebo's evil twin: convince yourself a sugar pill hurts, and it obligingly does.

means A harmless substance or treatment that causes real negative symptoms purely because you expect it to.

from Latin for 'I shall harm,' coined in the 1960s as the deliberate mirror image of placebo, 'I shall please.'

Side effectsWarning labels can literally trigger the symptoms they list.
Drug trialsPlacebo groups routinely report headaches and nausea anyway.
ContagiousWatching others suffer can summon your own symptoms.
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