placebo

Definium Therapeutics reported that a single dose of its LSD-based experimental pill significantly reduced major depression symptoms in a late-stage trial, leading to a 55% surge in its shares to a four-year high. Patients on the drug recorded lower depression scale scores than those on placebo after six weeks.

A small clinical trial found that older adults with depression who took a daily probiotic alongside their antidepressant treatment showed slightly greater improvements in depression and anxiety symptoms compared to those who received a placebo.