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Concerta is a drug used to treat attention-deficit/hyperactivity disorder (ADHD) in children, adolescents and adults. It works by increasing the brain chemicals dopamine and norepinephrine. The stimulant has been linked to many serious side effects, including serious heart problems in patients with preexisting heart conditions, prolonged erections, worsening of preexisting psychosis and tics. It also has a high potential for drug dependence and abuse.

Last Modified: January 26, 2024
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Concerta (methylphenidate hydrochloride) extended-release tablets belong to a class of stimulant drugs that doctors use to treat attention-deficit/hyperactivity disorder, or ADHD, in patients who are 6 years old and older.

Janssen Pharmaceuticals, a subsidiary of Johnson & Johnson, sells the drug, which was approved by the U.S. Food and Drug Administration in 2000. Johnson & Johnson acquired the drug’s maker, Alza Corporation, in 2001. Generic versions of the drug are also available.

Johnson & Johnson Headquarters
Johnson & Johnson headquarters at One Johnson & Johnson Plaza in New Brunswick, New Jersey

The medication is similar to the older ADHD drug, Ritalin, and contains the same active ingredient. But unlike Ritalin, Concerta comes in a special time-release formula so patients only have to take it once a day.

The FDA required a black box warning be added to Concerta’s label to advise patients of the high risk of drug dependence associated with the medication and to warn that chronic abuse of the drug could lead to psychological dependence, abnormal behavior and psychotic episodes.

ADHD Medication

Concerta is used to treat ADHD, which is a neurobehavioral disorder that causes persistent inattention, impulsivity and hyperactivity that interferes with day-to-day functioning and development.

While there’s no cure for ADHD, medications can reduce symptoms and make it easier to focus at work and at school. According to a 2016 study in the

Concerta’s effectiveness in treating this condition was demonstrated in four randomized, double-blind, placebo-controlled studies in children and adolescents who met the criteria for a diagnosis of ADHD. Three controlled trials involved children who were between 6 years old and 12 years old, and one controlled trial was conducted with adolescents who ranged from 13 years old to 18 years old.

One 2022 research study demonstrated increased efficacy and likelihood of discontinuation due to adverse effects as the dosage increased. The incremental benefits of effectiveness decreased beyond 20 mg to 30 mg.

That said, medications don’t work the same for everyone. It can take time to find the right medication and the dose that work best for you, and your prescribing doctor should monitor you closely during this process. Other than medication, treatment can include psychotherapy, education or training, and a combination of all therapies.


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How Does Concerta Work?

As a stimulant, Concerta works to improve thinking and attention by increasing dopamine and norepinephrine, which are brain chemicals scientists believe play a role in ADHD.

Although it may appear counterintuitive to use a stimulant to counteract hyperactivity, the drug has a calming effect on people with ADHD, and it helps them to focus better and ignore distractions.

While dopamine is associated with pleasure, it is also linked to motivation. A 2001 article in the leading medical journal The BMJ explains that dopamine cuts down on background noise in brain circuits and that helps people with ADHD to focus on activities such as math homework that might have previously seemed boring.

Norepinephrine, which is known for ramping up alertness in fight-or-flight situations, can also help people stay on task with quieter activities such as studying.

How to Take Concerta

Concerta is an extended-release drug, which means it releases its active ingredient, methylphenidate hydrochloride, at a steady, controlled rate throughout the day. The medication comes in a tablet that patients swallow whole once a day in the morning. It is important that the pill is not chewed, divided or crushed.

The stimulant drug works best when it’s part of a comprehensive ADHD treatment program that also includes psychological, educational and social measures.

The long-term effectiveness of the drug (more than seven weeks) has not been systematically evaluated in controlled trials, according to the drug’s prescribing information. It is recommended that doctors who opt to prescribe the medication for longer periods of time periodically re-evaluate the long-term usefulness of the drug.

Daily Dosing

Concerta extended-release tablets come in four dosage strengths. Each tablet is a different color with its number of milligrams imprinted on the pill. Your doctor will work with you to determine the best dose. The table below describes the appearance of the different strength tablets for the brand name product, Concerta. Generic versions of the medication may have a different appearance.

DosePill Description
18 mg tabletsYellow and labeled “alza 18”
27 mg tabletsGray and labeled “alza 27”
36 mg tabletsWhite and labeled “alza 36”
54 mg tablets Brownish-red and labeled “alza 54”

The recommended starting dose for patients who are not currently taking methylphenidate or other stimulants is 18 mg taken once a day for children and adolescents and 18 mg or 36 mg taken once a day for adults. Dosages should not exceed 54 mg a day for children and 72 mg a day for adolescents and adults.

Doctors may increase the dose in 18 mg increments at weekly intervals for patients who are not seeing desired therapeutic results at a lower dose. A 27 mg dosage strength is available to doctors to prescribe between the 18 mg and 36 mg dosages.

When patients are already taking methylphenidate immediate-release tablets two or three times a day at doses of 10 mg to 60 mg, conversion to Concerta (methylphenidate extended-release tablets) should be based on the current dosing regimen and clinical judgment. The conversion dosage should not exceed 72 mg a day.

Previous Methylphenidate Immediate-Release Daily DoseRecommended Concerta Starting Dose
5 mg methylphenidate two or three times a day18 mg once a day in the morning
10 mg methylphenidate two or three times a day36 mg once a day in the morning
15 mg methylphenidate two or three times a day54 mg once a day in the morning
20 mg methylphenidate two or three times a day72 mg once a day in the morning


Taking too large a dose of Concerta can lead to an overdose. This can cause an overstimulation of the central and sympathetic nervous systems.

Overdose symptoms may include:

  • Vomiting
  • Agitation
  • Muscle twitching
  • Convulsions (uncontrolled muscle contractions)
  • Confused mental state
  • Hallucinations
  • Excessive sweating
  • Faster than normal heart beat at rest or increased heart rate
  • Faster than normal heart beat at rest or increased heart rate
  • Dilated pupils
  • Dry mouth

If you suspect your child or someone else has taken too much Concerta and may have overdosed, call the poison control center at 1-800-222-1222 and seek emergency medical treatment.


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Dependence and Abuse

Concerta is regulated as a Schedule II controlled substance. According to the Drug Enforcement Administration, Schedule II substances have a high potential for abuse and may lead to psychological and physical dependence.

People sometimes abuse ADHD drugs to improve their performance at school or work. Some take large doses of the medication for its euphoric effects (to feel a “rush”), which according to the National Institutes of Health, can be similar to methamphetamine. This can cause rapid, instead of gradual, increases of dopamine in the brain that may lead to addiction.

People who abuse the drug may crush and inject it to try to get an immediate and intense high, but this raises the risk of “frank psychotic episodes,” according to the drug’s black box warning. Crushing or injecting the medication also increases the chance of cardiovascular risks, such as stroke, because insoluble fillers in the tablets can block small blood vessels.

Black Box Warning
Concerta carries a black box warning about a risk of drug dependence. Its label says to use the drug with caution in people who have a history of alcoholism or drug dependence.

Other dangers associated with the abuse of Concerta can include malnutrition due to decreased appetite, and feelings of hostility and paranoia.

Chronic abuse of the drug can result in psychological dependence and withdrawal symptoms when a person stops taking the drug. Withdrawal symptoms may include fatigue, depression and trouble sleeping. The drug’s label warns that “careful supervision is required” when withdrawing from use in patients who previously abused Concerta.

Possible Side Effects

Concerta and its active ingredient methylphenidate hydrochloride may cause a range of mild to serious side effects. The most common side effect demonstrated in children and adolescents who had been given the drug in clinical trials was upper abdominal pain.

Common side effects of Concerta use in adults include:
  • Decreased appetite
  • Headache
  • Dry mouth
  • Nausea
  • Trouble Sleeping
  • Anxiety
  • Dizziness
  • Lack of appetite and weight loss
  • Irritability and abnormal excess sweating (hyperhidrosis)
Child holding stomach in pain
The most common side effect demonstrated in children and adolescents who had been given Concerta in clinical trials was upper abdominal pain.

The stimulant medication has been linked to other serious adverse events, including heart problems, seizures, tics, gastrointestinal blockage, and long-term growth impairment.

Clinical trials also measured adverse reactions in patients who stopped taking the drug. Among children and adults, the most common side effects associated with stopping the medication included anxiety, irritability, trouble sleeping and increased blood pressure.

Drug Interactions

Certain medications can interact with Concerta. These interactions can reduce the effectiveness of either drug or increase the potential for adverse reactions. That’s why it’s important to talk to your doctor about any prescription medication or over-the-counter drugs you take.

Dangerous Combinations:
Monoamine oxidase (MAO) Inhibitors
Patients who take MAOI antidepressants should not take Concerta because it may cause a dangerous rise in blood pressure that can lead to a stroke. A hypertensive crisis can occur up to two weeks after stopping an MAOI.
Vasopressor Agents
Due to possible increases in blood pressure, patients using vasopressor agents, which are medications that boost low blood pressure, should exercise caution when taking Concerta.
Coumarin Anticoagulants, Antidepressants and Selective Serotonin Reuptake Inhibitors
Concerta may inhibit the breakdown of warfarin (a blood thinner), certain antidepressants and some antiseizure drugs. Dosing of these medications may need to be lowered if a patient takes them while also using Concerta, and plasma drug concentrations should be monitored when starting or stopping Concerta.


Use of Concerta is contraindicated in some patients. Children who are younger than 6 years old should not take the medication because safety and effectiveness has not yet been established in this age group. Also, the long-term effects of the drug have not been well established in children.

Use of the stimulant has also not been studied in patients who are older than 65 years old or in women who are pregnant. Potential risks to fetuses or breastfeeding infants are unknown.

Patients with the following conditions are advised not to take Concerta:

  • A hypersensitivity to methylphenidate or any other ingredient in the drug
  • Agitation, anxiety or tension (methylphenidate may worsen symptoms)
  • Glaucoma
  • Motor tics or a family history of Tourette’s syndrome


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Please seek the advice of a medical professional before making health care decisions.