So, let's connect some dots?
In 2011 there was a study with rhesus monkeys
The study was conducted on young rhesus monkeys under 5 years old. The monkeys were divided into groups with one receiving a low dose of methylphenidate, similar to the dose a human ADHD patient would receive, and the other group receiving a high dose, or 10 times what is used in humans. A separate control group was given only the material that the drug was dissolved in for the other monkeys but not the drug itself. These doses were administered over a 40-month time frame. The study was designed to evaluate possible toxic effects of the drug, such as DNA damage, so the effects they discovered were surprising.
The researchers, including Dr. Donald Mattison from the National Institute of Child Health and Human Development, discovered that testicular descent was significantly postponed in the monkeys that received the high dose of methylphenidate and lower blood testosterone levels and testicular volume were present in both sets of monkeys
Move ahead to 2013 & male children, you know, human boys
The study, published in The Medical Journal of Australia, investigated the growth and attainment of puberty in boys with ADHD who were taking stimulant medication. Sixty-five boys aged 12 to 16 who were taking ADHD stimulants for at least three years were compared against 174 similarly aged boys who did not have ADHD (referred to as 'healthy controls').
On average, the boys taking stimulants had taken them for an average of six years by the time the study was conducted. Researchers were provided height and weight data for each boy from the beginning of treatment (referred to as 'baseline') until the present. At baseline, the heights and weights of the boys were similar to those of healthy controls of the same age.
However, by age 12 to 14, boys who were taking stimulants for ADHD had significantly lower weight and body mass index than their peers who did not have ADHD. Likewise, by age 14 to 16, boys on stimulants had significantly lower height and weight. The higher their medication dose, the slower their growth rate was.
Also by age 14 to 16, boys taking stimulants were significantly delayed in terms of pubertal development compared to similarly aged healthy controls
The researchers concluded that taking stimulant medication for more than three years results in a slower rate of development during puberty.
Now, the human body is a complex living organism, affected greatly by what is ingested or taken in to it, right? What other developments were slowed or retarded.
Delayed or entirely uncompleted?
Let us look at another study. Remember we are dot connecting here.
Or perhaps running a thread through it all? Whichever?
Ritalin may affect young brains
"The changes we saw in the brains of treated rats occurred in areas strongly linked to higher executive functioning, addiction and appetite(instant gratification vs an ability to delay gratification), social relationships and stress, said Professor Teresa Milner, the study's lead author. "These alterations gradually disappeared over time once the rats no longer received the drug."
Ritalin may affect young brains? Understatement of the year, but, lets go with it.
Ritalin retards growth and pubescent development in males.
Ritalin alters, changes or retards brain development
Specifically the higher executive functions of the brain
Let's move forward to one of so many psychiatric diagnosis. A newer one. One that has been making the rounds the past few years. Adult ADHD
Some children with ADHD continue to have it as adults
These adults may have a history of failure at school, problems at work, or difficult or failed relationships
Many have had multiple traffic accidents. Like teens, adults with ADHD may seem restless and may try to do several things at once, most of them unsuccessfully. They also tend to prefer "quick fixes," rather than taking the steps needed to achieve greater rewards.(instant gratification vs an ability to delay gratification)
The stimulants prescribed for ADHD diagnosed children, cause changes in the brains of treated rats linked to higher functions.
Addiction. Social relationships and stress.
Is adult ADHD, born of childhood diagnosis and prescribed medications that subsequently retarded or damaged normal development including the higher functions to their brain?
Looks to be possible!
FYI: Boys are diagnosed more often with ADHD then girls