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Guide · ADHD medication

Ritalin and Concerta: how the methylphenidate options differ

Ritalin, Ritalin LA and Concerta all contain the same medicine, methylphenidate. What differs is how the dose is released through the day. This guide explains each, what the research shows and the risks.

Updated 25 September 2026 · About 8 minutes to read · All guides

In short

  • Ritalin, Ritalin LA and Concerta all contain methylphenidate, a stimulant approved in Australia for ADHD. Ritalin 10 is also approved for narcolepsy.
  • The difference is timing: Ritalin 10 lasts about 3 to 4 hours, Ritalin LA about 6 to 8 hours and Concerta about 6 to 12 hours.
  • In short-term trials methylphenidate reduced ADHD symptoms more than placebo, but Cochrane reviews rate the certainty of that evidence as very low.
  • Common side effects include reduced appetite, trouble sleeping, headache and stomach pain, and heart rate, blood pressure and children’s growth are monitored.
  • Methylphenidate is a Schedule 8 controlled medicine, and sharing it or taking someone else’s is illegal.

What methylphenidate is and how it works

Methylphenidate (methylphenidate hydrochloride) is a stimulant medicine. Ritalin, Ritalin LA and Concerta are brand names for it, so the medicine inside is the same. What differs is how quickly it is released after it is swallowed, and so how long it lasts.

The product information says methylphenidate “presumably” works by blocking the reuptake of two chemical messengers, dopamine and noradrenaline, so more of them stays active in the brain. In people with ADHD it can increase attention and reduce impulsiveness and hyperactivity.

Ritalin 10, Ritalin LA and Concerta compared

ProductFormHow the dose is releasedTypical durationUsually taken
Ritalin 10Immediate-release 10 mg tabletAll at once; blood levels peak about 2 hours after a dose3 to 4 hours2 to 3 times a day
Ritalin LAModified-release capsule (10, 20, 30, 40 or 60 mg)Two peaks in the blood about 4 hours apart from one dose6 to 8 hoursOnce, in the morning
ConcertaModified-release tablet (18, 27, 36 or 54 mg)Outer layer dissolves straight away; the rest is released slowly through the day6 to 12 hoursOnce, in the morning

Durations are the ranges given in Australian Prescriber. Concerta’s product information describes a 12-hour duration of effect.

Healthdirect explains the trade-off in general terms: short-acting medicines work quickly but briefly, and long-acting ones are slower to start but last longer. Which suits a person is decided with the prescriber.

Healthdirect’s medicine listing also shows other brands and generic versions of methylphenidate, including several products labelled XR or LA. Each product has its own consumer medicine information (CMI).

What it is approved for in Australia

  • ADHD. Ritalin 10, Ritalin LA and Concerta are all approved for ADHD. None is for children under 6.
  • Narcolepsy. Ritalin 10 tablets are also approved for narcolepsy, which the Ritalin CMI describes as a sleep-attack disorder.

Registered age ranges differ by product. AADPA summarises the TGA registrations as immediate-release methylphenidate from 6 to 17, Ritalin LA from 6 to 60 and Concerta from 6 to 65. The Ritalin product information says only Ritalin LA, not Ritalin 10, should be used for ADHD in adults. Prescribing outside a registered age range is called off-label use.

Concerta’s product information says treatment should be started by a specialist. Who can start and continue stimulants also depends on the state or territory.

What the evidence shows

Cortese et al. (2018). This network meta-analysis compared ADHD medicines across 133 double-blind trials. At around 12 weeks, methylphenidate reduced clinician-rated symptoms more than placebo in children and teenagers, and by a smaller margin in adults. It was less well tolerated than placebo in adults but not in children. Weighing both, the authors named methylphenidate the preferred first choice for short-term treatment in children and teenagers, and amphetamines in adults. They stressed how few trials ran beyond 12 weeks.

Cochrane review, children and teenagers (Storebø et al. 2023). Across 212 trials with 16,302 participants, methylphenidate may improve teacher-rated ADHD symptoms, by about 10.6 points on a 72-point rating scale. That is above the 6.6 points the authors treated as the smallest meaningful change. Serious adverse events were not clearly increased, but non-serious ones such as sleep problems and reduced appetite were. The authors rated the certainty of every result as very low. Trials averaged about four weeks, and because side effects make it easy to tell who is on the real medicine, the authors considered every trial at high risk of bias.

Cochrane reviews, adults. For extended-release methylphenidate (24 trials, 5,066 participants), symptoms improved by a small to moderate amount, adverse events were more common, and serious ones were not clearly increased. Certainty was very low, most trials ran about 8 weeks, and the authors concluded the benefits and harms remain uncertain. For immediate-release methylphenidate in adults (10 trials, 497 participants), they found no certain evidence of symptom reduction, and more stomach and appetite side effects.

Read together, the network meta-analysis and the Cochrane review in children both found symptoms improved more than on placebo in short trials. They differ on how much confidence to place in the size of the effect, and both point to a lack of long-term trials. Australian Prescriber estimates about 70% of children respond to stimulants, so some do not.

Side effects and who should not take it

Australian Prescriber lists appetite suppression, irritability, insomnia, stomach pain and headache as the most common stimulant side effects. In Concerta’s adult trials, reduced appetite was reported by about a quarter of people taking it, compared with 6% on placebo. Dry mouth, trouble sleeping, anxiety and a faster heart rate were also more common than on placebo.

  • Heart and blood pressure. Before starting, people should be assessed for heart problems and any family history of sudden death or dangerous heart rhythms. Australian Prescriber recommends measuring height, weight, heart rate and blood pressure at least every six months.
  • Growth. Concerta’s product information reports a temporary slowing of growth in children taking it consistently: on average about 2 cm less height and 2.7 kg less weight over three years. Treatment may be paused if a child is not growing as expected.
  • Mental health. Stimulants at usual doses can cause new psychotic or manic symptoms. In a 2024 US case-control study, past-month methylphenidate use was not linked with higher odds of a first episode of psychosis or mania, though one observational study cannot settle the question.
  • Other. Methylphenidate may lower the seizure threshold in a small minority of people, and prolonged, painful erections needing urgent attention have been reported.

The product information lists conditions in which methylphenidate should not be used. The lists differ slightly between products but include glaucoma, significant heart problems or uncontrolled high blood pressure, phaeochromocytoma (a rare adrenal gland tumour), recent use of an MAOI antidepressant, severe depression, suicidal thoughts and psychosis. Ritalin’s list also includes anxiety, tension or agitation, an overactive thyroid, Tourette’s syndrome or a family history of it, and drug or alcohol dependence. Concerta’s includes anorexia nervosa. Australian Prescriber notes that stimulants can worsen tics and anxiety, but that having them does not by itself rule out medication.

Get urgent medical help for chest pain, a very fast or irregular heartbeat, a seizure, seeing or hearing things that are not there, or thoughts of suicide.

Schedule 8 controls and misuse

Methylphenidate is a Schedule 8 controlled drug, as are dexamfetamine and lisdexamfetamine. In practice:

  • Prescribers generally need approval from their state or territory, and the rules differ. In NSW a script needs an NSW Health approval number before a pharmacist can dispense it. Western Australia allows one stimulant prescriber per patient at a time.
  • Real-time prescription monitoring tracks controlled medicines in every state and territory, and it is mandatory in Victoria and Queensland.
  • Healthdirect notes that prescriptions must be held at the pharmacy.

The product information warns that chronic misuse can lead to marked tolerance and psychological dependence, and that psychotic episodes can occur, especially when it is injected. Stopping after misuse needs careful supervision, because severe depression can follow.

Healthdirect states that sharing ADHD medicine or taking someone else’s is unsafe and illegal in Australia. Methylphenidate is sometimes called a “smart drug”, but research in healthy people finds modest effects at best, and one placebo-controlled study found methylphenidate made people work harder while lowering the quality of their problem-solving. The dexamphetamine guide covers this research. Healthdirect advises storing ADHD medicines out of children’s reach.

Questions to ask the prescriber

  • Which release pattern suits the day, and why this product rather than another?
  • If the pharmacy supplies a different brand or generic, does it release the medicine in the same way?
  • How will we know it is working, and when will we review it?
  • Which side effects are expected early, and which need a call straight away?
  • What heart, blood pressure, growth and weight checks will happen, and how often?
  • Does it interact with other medicines, including antidepressants?
  • What are the rules for travelling with it, changing prescribers or moving interstate?

This guide is general information, not medical advice. Decisions about starting, changing or stopping medication are made with the prescribing doctor.

Questions people ask

What is the difference between Ritalin and Concerta?

Both contain methylphenidate. Ritalin 10 is an immediate-release tablet lasting about 3 to 4 hours, Ritalin LA is a capsule giving two peaks about 4 hours apart and lasting about 6 to 8 hours, and Concerta is a tablet releasing the medicine slowly over about 6 to 12 hours. Which suits a person is decided with the prescriber.

How long does Ritalin last?

Australian Prescriber lists Ritalin 10 as lasting about 3 to 4 hours, usually taken 2 to 3 times a day. Ritalin LA lasts about 6 to 8 hours from one morning dose.

How long does Concerta last?

Australian Prescriber gives a range of about 6 to 12 hours, and Concerta’s product information describes a 12-hour duration of effect. It is taken once in the morning and must be swallowed whole.

Can adults take Ritalin or Concerta?

Yes, within the registered ranges: AADPA summarises Ritalin LA as registered from 6 to 60 and Concerta from 6 to 65. The Ritalin product information says only Ritalin LA, not Ritalin 10, should be used for adult ADHD. Cochrane reviews rate the evidence for methylphenidate in adults as low to very low certainty.

Is Ritalin a Schedule 8 drug?

Yes. All methylphenidate products are Schedule 8 controlled drugs in Australia. Prescribers generally need state or territory approval, prescribing is tracked through real-time prescription monitoring, and the rules differ between states.

Does Ritalin help people without ADHD study?

The evidence says not much. A meta-analysis of studies in healthy people found probably modest effects, and a 2023 placebo-controlled study found methylphenidate made people work harder but produce lower-quality solutions. Taking someone else’s prescription is also illegal in Australia.

Related

ADHD medication · Lisdexamfetamine (Vyvanse) · Dexamphetamine · All guides

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