Atomoxetine
Is It Right for You?
A complete guide to Atomoxetine — what it treats, how it works, dosages, side effects, and when a clinician may prescribe it following an online consultation.
What Is Atomoxetine?
Atomoxetine is a non-stimulant medicine used to treat attention deficit hyperactivity disorder (ADHD) in children, adolescents, and adults. It helps improve attention, focus, and control over impulsive behaviour.
Unlike stimulant ADHD medicines, atomoxetine is not a controlled drug and works steadily throughout the day rather than wearing off quickly. It is taken as a capsule, usually once or twice a day, and is available generically and under the brand name Strattera.
Atomoxetine is a prescription-only medication in the UK and ADHD treatment is normally started by a specialist. A licensed clinician must review your symptoms and medical history before it can be prescribed or continued - which can often be arranged through a telehealth consultation.
What Conditions Is Atomoxetine Used For?
Atomoxetine is prescribed for:
improving concentration and reducing impulsivity and restlessness.
used as part of a wider treatment programme, usually after specialist assessment.
a useful option for people who cannot take or did not respond to stimulant medicines.
Atomoxetine does not work straight away. It can take several weeks of regular dosing to reach its full effect, so do not stop taking it because you do not notice an immediate change.
How Does Atomoxetine Work?
Atomoxetine is a selective noradrenaline reuptake inhibitor. It works by blocking the reabsorption of noradrenaline, a chemical messenger in the brain, so more of it remains active in the areas that control attention and impulse control.
By increasing noradrenaline activity in these brain circuits, atomoxetine helps improve focus and reduce hyperactivity and impulsivity. Because it is not a stimulant, its effect is steady rather than rapid.
This steady, all-day action is why atomoxetine is taken regularly every day and why its benefits build up over weeks rather than appearing within hours.
Dosages & Administration
The correct dose depends on the type and severity of infection, age, weight, and kidney function. Always follow your clinician's instructions. The table below is for general reference only.
Administration Tips
Take at the same time each day, with or without food. Swallow capsules whole; do not open them, as the contents can irritate the eyes.
Be patient, as the full benefit may take several weeks to appear. Keep taking it as prescribed even before you notice a change.
Side Effects of Atomoxetine
Most side effects are mild and often settle with time. Some require monitoring, particularly mood and blood pressure.
- Reduced appetite
- Nausea or stomach upset
- Dry mouth
- Difficulty sleeping
- Dizziness
- Headache
- Faster heartbeat or raised blood pressure
- New or worsening low mood or suicidal thoughts
- Signs of liver problems - yellowing skin, dark urine, abdominal pain
- Chest pain or fainting
- Fast or irregular heartbeat
- Severe allergic reaction
Atomoxetine has been linked to new or worsening suicidal thoughts, particularly in children and young people. Anyone taking it should be monitored, and you must seek urgent help if mood changes or distressing thoughts develop.
Drug Interactions
Always disclose all prescription drugs, over-the-counter medicines, vitamins, and supplements to your clinician or pharmacist before starting atomoxetine.
Atomoxetine must not be taken with, or within two weeks of, a monoamine oxidase inhibitor due to the risk of serious reactions.
Combined use can increase heart rate and blood pressure.
These can raise atomoxetine levels in the blood, so the dose may need adjusting.
Caution is needed when combining with drugs that can prolong the QT interval.
Decongestants and similar products can add to atomoxetine's effect on blood pressure.
Important Warnings
Atomoxetine can raise heart rate and blood pressure. Tell your clinician about any heart problems, palpitations, or family history of sudden cardiac death before starting.
Tell your clinician about any history of depression, anxiety, or suicidal thoughts. Mood should be monitored, especially in the early weeks of treatment.
Rare cases of liver injury have been reported. Seek medical advice promptly if you develop yellowing of the skin or eyes, dark urine, or unexplained tummy pain.
The safety of atomoxetine in pregnancy and breastfeeding is not well established. Tell your clinician if you are pregnant, planning pregnancy, or breastfeeding.
Speak to a Clinician About Treatment
Getting advice no longer means sitting in a waiting room. Through The GP Service, you can consult with a licensed clinician in minutes — from home, on your lunch break, or wherever works for you. If treatment is clinically appropriate, your clinician can issue a prescription during the consultation. A consultation does not guarantee a prescription.
The treatment you need, when you need it.
Atomoxetine FAQs
ADHD treatment is normally started by a specialist. A licensed clinician can review your diagnosis and history through a telehealth consultation and may prescribe or continue atomoxetine where appropriate, with suitable monitoring.
No. Unlike stimulant ADHD medicines, atomoxetine is not a controlled substance and has no recognised potential for misuse.
Atomoxetine works gradually. Some improvement may appear within a couple of weeks, but the full benefit can take six weeks or longer of regular dosing.
There is no specific dangerous interaction, but alcohol can worsen mood and concentration and is best limited while establishing treatment. Discuss your situation with your clinician.
Take it when you remember, but if it is almost time for the next dose, skip the missed one. Do not take two doses together.
Reduced appetite is common, especially early on. Taking it with food and eating regular meals can help. Tell your clinician if you lose weight or appetite remains poor.
Atomoxetine can usually be stopped without tapering, but you should always discuss any changes with your clinician first so your ADHD treatment can be managed properly.