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Study Finds ADHD Drugs Alter Developing Brain

Altering brain development can lead to lasting and even permanent changes

A new study, published in the JAMA Psychiatry, investigates the effect of stimulant ‘ADHD’ drugs on the brains of children and young adults. The results of the randomized, double-blind, placebo-controlled trial, the ‘gold standard’ for evidence in academic medicine, indicate that methylphenidate (Ritalin) has a distinct effect on children that may lead to lasting neurological changes.

“Because maturation of several brain regions is not complete until adolescence, drugs given during the sensitive early phases of life may affect neurodevelopmental trajectories that can have more profound effects later in life,” write the researchers, led by Liesbeth Reneman, a physician and researcher at the University of Amsterdam.

ritalin bobbleheadsEven as methylphenidate hydrochloride (Ritalin) is the most frequently prescribed treatments for attention-deficit/ hyperactivity disorder (ADHD), and is increasingly being used by a greater percentage of children in the US, little research has been done on the effects of the drug on the developing brain. Up to this point, the effects of this particular drug on the development of the brain in children and young adults have only been studied in animals.

“The adolescent brain is a rapidly developing system that maintains high levels of plasticity. As such, the brain may be particularly vulnerable to drugs that interfere with these processes or modify the specific transmitter systems involved,” the researchers write.

The animal studies we do have point to a worrying result. In adult animals, the long-term exposure to stimulant medications appears to induce a temporary adaptation in the brain, which can be reversed. In juvenile animals, however, where the dopaminergic system is still developing, long-term exposure to ‘ADHD’ drugs leads to lasting and sometimes permanent changes. This process is referred to as “neurochemical imprinting.”

“Safety investigations on the effects of methylphenidate on DA function in the developing brain are scarce in children. Regardless of this alarming paucity of findings, increasingly greater numbers of children and young adolescents are exposed to methylphenidate, many of whom likely do not meet the criteria for ADHD,” Reneman and her colleagues note.

“This heightened use has led to considerable debate and concern (eg, among parents) about the long-term consequences or possible adverse effects of methylphenidate use in children.”

In the first attempt to investigate “neurochemical imprinting,” and age-dependent brain changes, in humans, the researchers designed the Effects of Psychotropic Drugs on Developing Brain–Methylphenidate study.  The multicenter trial randomly assigned 99 male patients diagnosed with ‘ADHD’ to either treatment with placebo or methylphenidate. After sixteen weeks and a one-week washout period, the researchers observed the dopaminergic function in children and adults using fMRI technology.

After four months of treatment with methylphenidate, they found significant changes in the brains of children that were not present in adults. It was hypothesized that the changes induced by the drugs in children might have a positive effect on the symptoms associated with ‘ADHD,’ but this was not the case for the children in this study.

“Because maturation of several brain regions is not complete until adolescence, drugs given during the sensitive early phases of life may affect neurodevelopmental trajectories that can have more profound effects later in life,” the study authors warn. “Indeed, the most comprehensive trial on the long-term effects of ADHD, the Multimodal Treatment Study of Children With ADHD (Full Text), reported that six years after enrollment, medication management was associated with a transient increase in the prevalence of anxiety and depression.”

This study provides the first evidence that the use of ‘ADHD’ drugs in children can alter the brain's development in significant and potentially lasting ways. While these changes did not appear to be connected with significant benefits or harms that were measurable in the short-term period of this study, the authors note that “the long-term consequences remain to be established.”



Schrantee, A., Tamminga, H.G., Bouziane, C., Bottelier, M.A., Bron, E.E., Mutsaerts, H.J.M., Zwinderman, A.H., Groote, I.R., Rombouts, S.A., Lindauer, R.J. and Klein, S., 2016. Age-Dependent Effects of Methylphenidate on the Human Dopaminergic System in Young vs Adult Patients With Attention-Deficit/Hyperactivity Disorder: A Randomized Clinical Trial. JAMA psychiatry. (Abstract)

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8 thoughts on “Study Finds ADHD Drugs Alter Developing Brain

  1. Child drugging leads to addiction by teaching kids how by doing drugs you can change the way you feel.

    I worked at a substance abuse treatment center and also attended it. Drugs were a constant topic of conversation so it was easy to ask the young people if they were drugged as kids for ADHD and the majority said yes.

    So first they teach you to do drugs to change how you feel and think and have you doing it all through childhood every day up then down and crash, then with the ADHD drugs the anxiety and depression jittery crash that makes you want to have a few drinks or a pain pill or two to level off and relax. I know this I have took Adderal for a wile.

    Maybe with these new electronic medical records someone will notice the pattern how its the psych med kids getting caught up in addiction.

    • Exactly.

      If it’s not ok to give a child meth from the corner drug dealer because we feel that the drug will adversely affect them in many ways, particularly because of their developing brains, why is it ok for psychiatrists to prescribe Ritalin, which is essentially legal meth? The two are essentially the same drug. This has never, ever made any sense to me at all. Anyone with any sense at all knows that this can’t be good but psychiatrists and GP’s go merrily on their way, prescribing this stuff to kids right and left.

  2. I would have been shocked if research had NOT eventually come to this conclusion. Dumb MDs and shrinks have been using a couple of generations of children as guinea pigs. How could off-label psych drugs NOT adversely affect a developing brain? A parent didn’t have to be Einstein to have the common sense to keep her/his child away from these pill-dispensing quacks.

    I hope parents speak to pharma in the only language it understands: class-action lawsuits.

    Liz Sydney

  3. drugs affect the brain? drugs affect childrens’ brains in big, big ways?

    Here’s the thing…as another poster has pointed out, that’s fairly obvious. Leave it to psychiatrists to ignore the obvious in favor of dogma and dollar$.

    What’s particularly troubling to me is that Ritalin may be one of the less dangrous drugs that kids these days are exposed to. The “atypicals” are often given to kids, especiallly foster kids, minority kids, low income kids, etc. Those drugs are dangrous in ways that make Ritalin look like…well, child’s play.

    Hopefully, more people with credentials–MDs, PhDs, etc.–will speak up and do something to help people in Mental Health, Inc. Until then…research like this is interesting, but it probably won’t do a whole lot to change prescribing habits.

    • No, it likely won’t change prescribing habits on the whole anytime soon. But hopefully it can be used by parents and advocates who are aware enough to challenge the system, evidence to point to that supports their valid refusal of such drugs.

    • I’ve never personally experienced an ADHD drug, but agree the atypical antipsychotics are horrendous drugs, they were confessed to be “torture” drugs by the UN in 2013. I’m shocked and disgusted they’re being prescribed on such a massive scale to the so called ADHD children in the US.

      The ‘atypical’ antipsychotics create the negative symptoms of ‘schizophrenia’ via neuroleptic induced deficit syndrome (NIDS), and the positive symptoms of ‘schizophrenia’ via anticholinergic toxidrome. But since these medically known ADRs of the ‘atypicals’ are not listed in the DSM, they are almost always misdiagnosed by the psychiatrists and mainstream doctors with a billable DSM disorder. Out of sight, out of mind.

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