People who have felt very sad often still have trouble remembering things, staying focused, or thinking clearly. This lingering “brain fog” can stay even after their mood gets better.
Researchers have now tested a medicine that is already used for chronic constipation. The drug, called prucalopride, may also help clear that fog.
How the Study Was Done
Scientists from two universities asked 50 adults who had recovered from depression to join a short trial. None of the volunteers were taking other medicines at the time.
Half of the participants took a 2 mg dose of prucalopride for about a week. The other half took a harmless sugar pill (placebo). Before and after the treatment, everyone completed simple tests that measured memory, attention, and how fast they could solve problems.
What the Researchers Found
People who received prucalopride answered the tests more quickly and correctly than those who took the placebo. Their scores on memory and attention tasks improved noticeably.
There were no major side‑effects reported, and the volunteers did not experience any stomach problems.
Tests Used in the Trial
- Listening and remembering word lists (verbal memory test)
- Remembering a pattern of numbers (working‑memory test)
- Quickly connecting numbers or letters (attention and speed test)
- Simple tasks that measured how emotions influence thinking
What This Could Mean
The results suggest that medicines that act on a specific brain receptor (5‑HT4) might be useful for treating the thinking problems that stay after depression.
Scientists plan to keep studying this approach, hoping to find safe ways to help people think more clearly even after they feel less sad.