ADHD Medication Options in the UK: A Complete Guide
There are several ADHD medications available in the UK, each working differently and suiting different people. This guide provides a clear comparison of every option — stimulants and non-stimulants — including how they work, typical dosing, common side effects, and practical advice on working with your prescriber to find the right medication for you.
This guide is for informational purposes only and does not constitute medical or legal advice. Always consult your GP, ICB, or a qualified specialist about your individual circumstances.
Stimulant vs Non-Stimulant Medications
ADHD medications fall into two main categories:
- Stimulants: The first-line treatment for most adults. They increase dopamine and noradrenaline in the brain. Fast-acting — effects noticeable within 30–90 minutes. Includes methylphenidate (Ritalin, Concerta) and amphetamine-based drugs (Elvanse, dexamfetamine).
- Non-stimulants: Used when stimulants are ineffective, cause significant side effects, or are clinically unsuitable. Slower onset — may take 4–8 weeks to reach full effect. Includes atomoxetine (Strattera) and guanfacine (Intuniv).
NICE guidelines recommend methylphenidate as first-line for children and lisdexamfetamine (Elvanse) as first-line for adults in the UK.
Methylphenidate-Based Medications
Methylphenidate is the most widely prescribed ADHD medication globally. UK brand names include:
- Concerta XL: Extended-release methylphenidate. Lasts 10–12 hours. Taken once daily in the morning. Strengths: 18mg, 27mg, 36mg, 54mg.
- Medikinet XL: Modified-release methylphenidate. Lasts 8–10 hours. Taken once daily with breakfast. Strengths: 5mg, 10mg, 20mg, 30mg, 40mg, 50mg, 60mg.
- Equasym XL: Modified-release methylphenidate. Lasts 6–8 hours. Often used as "top-up" alongside a longer-acting formulation. Strengths: 10mg, 20mg, 30mg.
- Ritalin: Immediate-release methylphenidate. Lasts 3–4 hours. Taken 2–3 times daily. Can be useful for fine-tuning or as an afternoon booster. Strengths: 10mg.
- Xenidate XL: Generic extended-release methylphenidate. Cheaper alternative to Concerta XL.
Amphetamine-Based Medications
Amphetamine-based medications are generally slightly more potent than methylphenidate and are often tried if methylphenidate is insufficient:
- Elvanse (lisdexamfetamine): A prodrug amphetamine — inactive until metabolised in the body, providing a smooth, sustained release. First-line for adults per NICE. Lasts 12–14 hours. Strengths: 20mg, 30mg, 40mg, 50mg, 60mg, 70mg.
- Dexamfetamine (Amfexa): Immediate-release dextroamphetamine. Lasts 4–6 hours. Taken 2–3 times daily. Used when Elvanse is unavailable or not tolerated. Strength: 5mg tablets.
Elvanse and dexamfetamine are both amphetamine-based but their doses are NOT directly interchangeable. 30mg Elvanse ≠ 30mg dexamfetamine. Always follow your prescriber's guidance when switching.
Non-Stimulant Medications
Non-stimulants are an important option for people who cannot tolerate stimulants or have specific contraindications:
- Atomoxetine (Strattera): A selective noradrenaline reuptake inhibitor. Not a controlled drug, so easier to prescribe (no Schedule 2 restrictions). Takes 4–8 weeks to reach full effect. Lasts 24 hours. Strengths: 10mg, 18mg, 25mg, 40mg, 60mg, 80mg, 100mg.
- Guanfacine (Intuniv): An alpha-2A agonist. Licensed for children/adolescents in the UK but sometimes used off-label for adults. Helpful for emotional dysregulation and hyperactivity. Strengths: 1mg, 2mg, 3mg, 4mg.
Common Side Effects
Most ADHD medication side effects are mild and often diminish after the first few weeks. Common side effects across all ADHD medications include:
- Reduced appetite: The most common side effect. Usually most pronounced in the first few weeks. Eating breakfast before medication helps.
- Difficulty sleeping: Particularly with longer-acting stimulants. Taking medication early in the morning and practising sleep hygiene helps.
- Dry mouth: Common with stimulants. Stay hydrated throughout the day.
- Increased heart rate and blood pressure: Usually clinically insignificant but monitored during titration. May be a concern for people with pre-existing cardiovascular conditions.
- Headaches: Common initially, usually resolve within 1–2 weeks.
- Emotional blunting: Some people feel less emotionally responsive on stimulants. Discuss with your prescriber — it may indicate the dose is too high.
- Medication rebound: A brief worsening of symptoms as medication wears off. Can be managed with formulation adjustments.
How to Work with Your Prescriber
Finding the right medication is a collaborative process. Here is how to make the most of it:
- Keep a medication log: Track symptoms, side effects, sleep, appetite, and mood daily. This gives your prescriber the data they need to make informed adjustments.
- Be honest about side effects: Do not downplay problems. Your prescriber can adjust the dose, switch formulations, or try a completely different medication.
- Give it time: Allow at least 2 weeks on a dose (4–8 weeks for non-stimulants) before concluding it is not working.
- Report positive changes too: Your prescriber needs to know what IS working as well as what is not.
- Ask about combination therapy: Some people benefit from a long-acting stimulant in the morning plus a short-acting booster in the afternoon.
Frequently Asked Questions
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