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# Methylphenidate

A stimulant for ADHD and narcolepsy that blocks dopamine and noradrenaline reuptake. It is a controlled substance because it can be abused.

Updated 2026-11-01

- Class: [ADHD medicines](https://durgical.com/en/pharmacology/classes/adhd-medicines/)
- Transporter: Dopamine transporter (DAT)
- ATC code: N06BA04

⇄**Dopamine transporter (DAT)**Methylphenidate

ⓘ The figure shows dexmethylphenidate (the active enantiomer of methylphenidate) in the human dopamine transporter.

**Target in 3D:** Dopamine transporter (DAT). PDB structure 8Y2G (RCSB PDB, public domain). [View the structure at RCSB PDB](https://www.rcsb.org/structure/8Y2G) · Drag to rotate · pinch to zoom

## Mechanism of action

Methylphenidate blocks the dopamine and noradrenaline transporters, so these neurotransmitters stay longer in the synapse. Higher catecholamine signalling in the prefrontal cortex improves attention and impulse control; the same action in reward circuits explains its abuse potential.

- Methylphenidate blocks DAT and NET
- Dopamine and noradrenaline stay longer in the synapse
- Prefrontal cortex: better attention and impulse control
- Reward circuits: risk of abuse

## Pharmacokinetics

**Absorption**
Taken by mouth; immediate- and extended-release forms exist

## Indications

- Attention-deficit/hyperactivity disorder (ADHD) in children aged 6 and older and adults
- Narcolepsy

## Adverse effects

### Common

- Reduced appetite and weight loss
- Insomnia
- Headache and abdominal pain
- Nervousness and irritability
- Faster heart rate and higher blood pressure

### Serious (rare, important)

- Abuse, misuse and addiction (boxed warning; controlled substance)
- Sudden death in people with structural heart disease; raised blood pressure and heart rate
- New psychosis or mania, or worsening of existing psychosis
- Peripheral vasculopathy including Raynaud's phenomenon
- Slowed growth in children
- Priapism (painful or prolonged erection)
- Raised eye pressure and acute angle-closure glaucoma

## Contraindications

- Use of an MAO inhibitor now or within the previous 14 days
- Hypersensitivity to methylphenidate

## Key interactions

**MAO inhibitors**
Hypertensive crisis: contraindicated

**Antihypertensives**
Weaker blood-pressure lowering

## What is monitored

- Blood pressure and heart rate
- Height and weight in children
- Signs of abuse or diversion
- Mood, psychotic or manic symptoms

## Administration and safety

- Immediate- and extended-release products are not interchangeable one-for-one; each product is given as its own label directs
- Controlled substance: counted, stored securely and documented

## Nursing care

- Measures blood pressure, heart rate, height and weight before starting and during treatment
- Asks about heart disease, fainting and family history of sudden death before starting
- Teaches safe storage and disposal and warns against sharing the medicine
- Teaches to report cold, pale or bluish fingers or toes
- Teaches that a painful or prolonged erection needs urgent care

## Pregnancy and breastfeeding

Human data are limited; use in pregnancy weighs the benefit for the mother against possible risks to the fetus.

## Memory aid

Methylphenidate «plugs the drain»: it blocks the reuptake pumps, so dopamine and noradrenaline stay in the synapse.

## Test yourself

Think of the answer, then tap the question to see it.

## What is the mechanism of methylphenidate?

It blocks the dopamine and noradrenaline transporters, increasing these neurotransmitters in the synapse.

## Which growth measure is followed in children on methylphenidate?

Height and weight, because stimulants can reduce appetite and slow growth.

## Which drug class is contraindicated with methylphenidate and why?

MAO inhibitors (now or in the last 14 days), because of the risk of hypertensive crisis.

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## Related drugs

- [Amfetamine](https://durgical.com/en/pharmacology/amfetamine/)
- [Atomoxetine](https://durgical.com/en/pharmacology/atomoxetine/)

[← Back to the class: ADHD medicines](https://durgical.com/en/pharmacology/classes/adhd-medicines/)

Educational content on how drugs work; not a prescribing guide and no substitute for a health professional's advice. No doses are given.

Sources: [DailyMed - METHYLPHENIDATE HYDROCHLORIDE tablet](https://dailymed.nlm.nih.gov/dailymed/drugInfo.cfm?setid=35be77db-fbe3-487e-a220-a08a11aaec28) (DailyMed (U.S. National Library of Medicine), 2026); [Methylphenidate: MedlinePlus Drug Information](https://medlineplus.gov/druginfo/meds/a682188.html) (MedlinePlus (U.S. National Library of Medicine), 2026).

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Representative model, for educational purposes only.

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