Depression is more than feeling sad.
Many people continue to struggle with poor memory, trouble concentrating, and mental “brain fog” even after their mood has improved. These thinking problems can make it difficult to work, study, or enjoy everyday life.
A new study suggests that a medicine already approved for chronic constipation may help improve these lingering cognitive problems.
The research was led by scientists from the University of Birmingham and the University of Oxford and was published in the journal Psychological Medicine.
The drug is called prucalopride. It is normally prescribed to help people with chronic constipation by stimulating bowel movements. However, it also acts on a serotonin receptor called 5-HT4, which is found not only in the gut but also in the brain.
Serotonin is a chemical messenger involved in mood, learning, memory, and many other brain functions. Researchers wondered whether activating this receptor could improve thinking and memory in people who had recovered from depression but still experienced cognitive difficulties.
The clinical trial included 50 adults with a history of depression. All had recovered from their depressive episodes for at least six months and were not taking antidepressants. Participants were randomly assigned to receive either 2 milligrams of prucalopride or a placebo for about one week.
Before and after treatment, the volunteers completed several tests measuring memory, attention, processing speed, and decision-making. They also completed tasks that examined emotional thinking.
The results showed that people taking prucalopride responded faster and more accurately on tests of memory and executive function than those taking the placebo. The researchers did not find any major side effects during the short study, and most participants tolerated the medicine well.
The scientists believe these findings are important because cognitive symptoms often remain even after depression improves. Current antidepressants are generally more effective at treating low mood than they are at restoring memory and concentration.
Because prucalopride is already an approved medicine, future research may move faster than if an entirely new drug had to be developed. Even so, this was a small, short-term study, so much larger clinical trials are still needed to confirm the results and determine how long any benefits may last.
The study provides encouraging early evidence that medicines targeting the 5-HT4 serotonin receptor could become a new way to treat brain fog after depression. While people should not take prucalopride for this purpose without medical advice, the research opens an interesting new direction that could eventually improve quality of life for many patients.
If you care about mental health, please read studies about how dairy foods may influence depression risk, and 6 foods you can eat to improve mental health.
For more mental health information, please see recent studies about top foods to tame your stress, and Omega-3 fats may help reduce depression.
Source: University of Birmingham.
