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The Science of Addiction: Genetics and the Brain
Ritalin and Cocaine: The Connection and the Controversy

Ritalin and Cocaine: The Connection and the Controversy

Since the mid-1950s, doctors have been using Ritalin (also called methylphenidate) to treat a variety of conditions including depression, fatigue syndrome, and narcolepsy. Ritalin gained FDA approval for treatment of hyperactivity in children in 1961.

Ritalin is the most commonly prescribed medication for ADHD (attention deficit hyperactivity disorder). This treatment has helped thousands of people control their symptoms. But because Ritalin is a stimulant like cocaine, it may cause undesirable changes in the brain over time. It also has the potential for abuse, and because it’s a legal prescription drug, many wrongly assume that it is not dangerous.

So what are the benefits of Ritalin, and what are the risks?

Ritalin is currently prescribed to approximately six million people in the US.


75% of these are children, with boys receiving Ritalin about four times more often than girls.

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ADHD: The Benefits of Ritalin

People with ADHD have difficulty concentrating, and they can be hyperactive or impulsive. They also have lower levels of the brain chemical dopamine.

Dopamine helps people control their behavior, so having the right level of dopamine in the brain is important. Ritalin increases dopamine levels, helping those with ADHD to focus, filter out distractions, and make decisions based on reason rather than emotion.

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Ritalin is Similar to Cocaine

Ritalin Synapse
Research shows that 10-30% of cocaine addicts have ADHD.
30-50% of adolescents in drug treatment centers report abusing Ritalin.

There can be unintended consequences when an adult uses cocaine to control their ADHD. --Dr. Glen Hansen

Like cocaine, Ritalin is a powerful stimulant that increases alertness and productivity. Ritalin and cocaine also look and act very much alike. They have a similar chemical structure, and both increase dopamine levels in the brain. They do this by blocking a dopamine transporter protein, which normally takes up dopamine from the synapse.

ADHD children are typically taken off of Ritalin when they reach adulthood. Interestingly, these individuals seem to be more prone to cocaine addiction. Why is that? Because Ritalin and cocaine are similar drugs, it's possible that ADHD adults are unknowingly using cocaine as a replacement for Ritalin. In other words, it may be an attempt to self-medicate. Cocaine may help individuals with ADHD focus and feel calm and in control.

Ritalin and Cocaine

Ritalin (left) and cocaine (right) share a similar chemical structure and mechanism of action.


Is Ritalin Addicting?

Prescription

Ritalin is not addictive when prescribed by doctors and taken as directed. Why this difference between Ritalin and cocaine? Ritalin is a pill that you swallow, so the drug takes longer to reach the brain. Cocaine is taken in high doses by injection or snorting. It floods the brain quickly with dopamine, which makes it dangerous and addictive.

Unfortunately, Ritalin is quickly becoming a drug of choice for teens. It's relatively cheap and accessible. And because it's a prescription drug, it's perceived to be safe. But if Ritalin is abused (taken in high doses) or taken improperly (by injection or snorting), it can be just as addictive as cocaine. This is because drug delivery methods can influence the addictive potential of a drug.

Is Ritalin a “gateway drug”? Studies show that proper Ritalin use does not lead to drug abuse. --Dr. Kelly Lundberg


The Consequences of Misdiagnosis

Misdiagnosis of ADHD is a common problem that complicates the Ritalin controversy. Some say that Ritalin is now over-prescribed, and that it may cause undesirable changes in the brain over time.

Recent animal studies suggest that children who are mistakenly diagnosed with ADHD and treated with Ritalin may be more likely to develop depression as adults. This can be explained by Ritalin's effects on the reward pathway.

We know that Ritalin increases dopamine levels in the brain. But an unnecessary increase in dopamine during childhood may change how the brain develops. The brain may become desensitized to natural rewards like food, romance, and social interactions, leading to depression.

However, failing to diagnose has ADHD has its problems too: Kids with untreated ADHD are four times more likely than normal to abuse drugs.

Kids with untreated ADHD are four times more likely than normal to abuse drugs. --Dr. Glen Hanson

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APA format:
Genetic Science Learning Center (2014, June 22) Ritalin and Cocaine: The Connection and the Controversy. Learn.Genetics. Retrieved October 25, 2014, from http://learn.genetics.utah.edu/content/addiction/ritalin/
MLA format:
Genetic Science Learning Center. "Ritalin and Cocaine: The Connection and the Controversy." Learn.Genetics 25 October 2014 <http://learn.genetics.utah.edu/content/addiction/ritalin/>
Chicago format:
Genetic Science Learning Center, "Ritalin and Cocaine: The Connection and the Controversy," Learn.Genetics, 22 June 2014, <http://learn.genetics.utah.edu/content/addiction/ritalin/> (25 October 2014)