Short answer: Dexmethylphenidate (Focalin) is the more active half of methylphenidate, so it works at about half the dose. It is used for ADHD and is a Schedule II controlled substance.
Key takeaways
- What it is: Dexmethylphenidate is a methylphenidate-type stimulant and a Schedule II controlled substance in the US.
- Main uses: ADHD.
- Timing: effects start in about 30 minutes and last 4 to 12 hours depending on form.
- Most dangerous mix: MAOIs (phenelzine, selegiline, linezolid), which can cause dangerous rise in blood pressure.
- Naloxone: it does not reverse this drug, but give it whenever opioids could be involved.
- Dependence risk: Moderate.
- Legal route: only with a prescription from a DEA-registered clinician, filled by a licensed pharmacy.
What is dexmethylphenidate?
Dexmethylphenidate is approved for ADHD in people 6 and older. Methylphenidate is a 50:50 mix of two mirror-image forms; dexmethylphenidate is only the active d-form.
Quick facts
| Fact | Dexmethylphenidate |
|---|---|
| Generic name | Dexmethylphenidate hydrochloride |
| Brand names | Focalin, Focalin XR; Azstarys (with serdexmethylphenidate) |
| Drug class | CNS stimulant |
| US legal status | Schedule II, prescription only |
| Approved uses | ADHD (age 6 and up) |
| Forms | Tablets, extended-release capsules |
| Onset | About 30 minutes |
| Duration | 4 to 6 hours (IR); up to 12 hours (XR) |
| Half-life | About 2 to 3 hours |
How long does dexmethylphenidate last?
- Starts working: About 30 minutes
- Effects last: 4 to 12 hours depending on form
- Half-life: About 2 to 3 hours
Up to about 12 hours.
Timing varies with the dose, the form, how it is taken, liver and kidney function, age, and other drugs taken at the same time.
What are the biggest risks of dexmethylphenidate?
The FDA requires boxed warnings, its strongest, on dexmethylphenidate products, including:
- Dexmethylphenidate has a high potential for abuse and misuse, which can lead to a substance use disorder, including addiction. Misuse and abuse of CNS stimulants can result in overdose and death, and this risk is increased with higher doses or unapproved methods of administration, such as snorting or injection.
- Prescribers should assess each patient's risk before prescribing, monitor for signs of misuse throughout treatment, and counsel patients not to share their medicine.
Common side effects include reduced appetite, stomach pain, insomnia, headache, and anxiety. Serious risks match methylphenidate.
What should you never mix with dexmethylphenidate?
| Combined with | What happens | Label guidance |
|---|---|---|
| MAOIs (phenelzine, selegiline, linezolid) | Dangerous rise in blood pressure | Contraindicated within 14 days |
| Other stimulants, decongestants (pseudoephedrine) | High blood pressure, fast heart rate | Use caution |
| SSRIs, SNRIs, tramadol, triptans | Serotonin syndrome (rare) | Use caution |
| Alcohol | Masks drunkenness; heart strain | Avoid |
Check any combination with the DoseUses combination checker or ask a pharmacist.
What are the signs of a dexmethylphenidate overdose, and what should you do?
Overdose causes agitation, tremor, confusion, hallucinations, very high temperature, fast heartbeat, high blood pressure, and seizures.
If someone may be overdosing
- Call 911 for chest pain, a seizure, trouble breathing, signs of a stroke (face drooping, weakness on one side, slurred speech), a very high body temperature, or if the person collapses.
- Move them somewhere cool and calm, loosen tight clothing, and cool the skin with water. Do not try to hold them down.
- If they become unresponsive or their breathing slows, give naloxone. Street stimulants are often contaminated with fentanyl.
- For advice when the person is awake and stable, call Poison Help at 1-800-222-1222.
What happens when you stop dexmethylphenidate?
Stopping dexmethylphenidate after regular prescribed use does not cause dangerous physical withdrawal. ADHD symptoms return, and some people feel tired or low for a few days. After heavy misuse, a "crash" with exhaustion, increased sleep and appetite, and depression is common.
- Days 1 to 3CrashFatigue, long sleep, increased appetite, low mood, irritability.
- Weeks 1 to 2Low mood and cravingsLow energy, poor concentration, and cravings after heavy use.
- Weeks to monthsRecoveryMood and energy normalize; depression should be watched for.
See the withdrawal timelines and the full dexmethylphenidate withdrawal guide.
Is dexmethylphenidate legal?
In the United States, dexmethylphenidate is a Schedule II controlled substance. The only legal way to get it is with a prescription from a clinician registered with the Drug Enforcement Administration (DEA), filled by a licensed pharmacy. Depending on state law, that can be a physician, nurse practitioner, or physician assistant.
- Refills: Schedule II prescriptions cannot be refilled. A prescriber can write several prescriptions at once, with dates when each may be filled, for up to a 90-day supply in total.
- Telehealth: federal flexibilities let DEA-registered clinicians prescribe Schedule II to V medicines after a telemedicine visit, without a prior in-person exam, through December 31, 2026. A permanent DEA rule was under final review in late 2026. State rules can be stricter.
- Monitoring: prescribers and pharmacists in most states check a prescription drug monitoring program, a database of controlled-substance prescriptions, before prescribing or dispensing.
Outside the United States
| Country | Status |
|---|---|
| United Kingdom | Class B; limited use |
| Canada | Schedule I |
| International | Methylphenidate and its isomers: Schedule II of the 1971 Convention |
Frequently asked questions about dexmethylphenidate
Is Focalin stronger than Ritalin?
Per milligram, yes, about twice as potent, because it contains only the active form. Effects at equivalent doses are similar.
What is Azstarys?
A once-daily capsule combining dexmethylphenidate with serdexmethylphenidate, a prodrug that is converted to dexmethylphenidate over the day.
How long does Focalin XR last?
Up to about 12 hours.
Sources
- Focalin (dexmethylphenidate) prescribing information, DailyMed, US National Library of Medicine.
- FDA updating warnings to improve safe use of prescription stimulants used to treat ADHD and other conditions, US Food and Drug Administration, 2023.
- Controlled Substance Schedules, DEA Diversion Control Division.
- 21 CFR 1306.12, Refilling prescriptions; issuance of multiple prescriptions (Schedule II), Electronic Code of Federal Regulations.
- Prescribing controlled substances via telehealth, US Department of Health and Human Services.
- BeSafeRx: Your Source for Online Pharmacy Information, US Food and Drug Administration.
- Safe Pharmacy, National Association of Boards of Pharmacy.
- One Pill Can Kill, US Drug Enforcement Administration.
This guide summarizes the sourced DoseUses Dexmethylphenidate profile, written from FDA labels, DEA rules, and federal health agencies. It is educational and is not medical advice. Last updated October 5, 2026.
