© Srdjan
Zivulovic / Reuters
|
A stimulant drug
successfully used to help people with sleep disorders stay awake can boost
cognitive functions in healthy people, according to a new study. The ‘smart
pill’ has been approved by the Food and Drug Administration. Researchers reviewed 24
studies on the drug modafinil which were carried out between 1990 and 2015 and
found that it appeared to improve cognitive function. Some of the studies also
showed gains in flexible thinking, increasing ability to combine information or
cope with novelty. The drug didn’t seem to influence creativity either way.
However,
researchers found that improvement wasn’t seen every time, on every test, or
for every person. They also found that the studies failed to show any
enhancement in the areas of attention, learning, and memory.
The
meta-analysis was recently published in European Neuropsychopharmacology.
RT.com
report continues:
“What
emerged was that the longer and the more complex the task ... the more
consistently modafinil showed cognitive benefits,” said Anna-Katharine Brem, a
neuropsychologist at Oxford and one of the paper’s authors, in an email to
the Atlantic.
Modafinil,
like Adderall and Ritalin, is increasingly being used by college students and
adults who don’t suffer from ADHD or sleep disorders, but are searching for
greater productivity. The drugs work by increasing the brain’s level of
dopamine and norepinephrine to boost concentration and alertness.
Studies
have found that the number of adults between the ages of 26 to 34 using
stimulant medications has doubled, rising from 1.5 percent in 2008 to 2.8
percent in 2013, according to FiveThirtyEight.
The
drugs can have negative health consequences, though, especially at large doses.
Adderall has been noted to induce psychosis, and emergency room visits
associated with the use of stimulants among young adults tripled between 2005
and 2011, according to the Substance Abuse and Mental Health Services
Administration.
Among
the study’s finding was that relatively few healthy people were assessed –
about 30 participants per study, on average. Researchers also found that many
of the cognitive tests used in the studies were more appropriate for people
with neuropsychiatric illness or neurological disorders.
“The
problem with this is that healthy people perform very well in them without
taking the drug and so improvements in performance on a substance are harder,
if not impossible, to detect,” wrote Brem.
Brem
and Ruairidh Battleday, another of the study’s authors, said the studies only
gave participants the drug once, so long term claims are hard to make. Still,
they said the benefits of the drug for enhancing attention, executive
functions, learning, and memory appear much stronger.
The study’s authors argue
there is a strong case for continuing testing using classical scientific
approaches – improved testing regimes, a larger participant pool, and prolonged
administration periods. The team also recommended cognitive training and
noninvasive brain stimulation during testing.
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