ImportantThis page is general information, not a prescription. Don't start, stop, or change a medicine without talking to your provider or pharmacist.
Overview
It takes several weeks to reach its full effect.
What it's used for
- ADHD in children 6 and older and adults
How to take it
- Take it with or without food, once or twice a day.
- Swallow capsules whole; don't open them (the powder irritates the eyes).
Your dose depends on your health and other medicines. Always follow your prescription label, and ask your pharmacist if anything is unclear.
Side effects
Common side effects
- Upset stomach
- Less appetite
- Tiredness
- Dizziness
- Mood swings
Call 911Thoughts of suicide or harming yourself. Call or text 988 any time.
Call 911Chest pain or fainting
Call your provider todayYellow skin or eyes, dark urine, or itching (liver)
Call 911An erection lasting more than 4 hours
Warnings
- Boxed warning: suicidal thoughts in children and teens. Watch closely, especially early on.
Other medicines, foods, and alcohol
- Never take within 14 days of an MAOI.
- Fluoxetine, paroxetine, and bupropion raise its level.
- Albuterol and stimulants add to heart effects.
Tell your provider and pharmacist about every medicine, vitamin, and supplement you take.
Pregnancy and breastfeeding
Talk with your provider.
Missed doses, overdose, and storage
If you miss a dose
Take it as soon as you remember, unless it's almost time for your next dose. Then skip the missed dose. Don't take two doses at once.
If someone takes too much
Call Poison Control at 1-800-222-1222 or get help online at poison.org. Call 911 if the person collapses, has a seizure, has trouble breathing, or can't be woken.
Storing it
Store at room temperature, away from heat and moisture (not in the bathroom), and out of reach of children and pets.
Conditions it's used for
Sources
- DailyMed: FDA drug label for Atomoxetine (U.S. National Library of Medicine)
- MedlinePlus: Drugs, herbs, and supplements
- FDA: Drugs@FDA
Last updated 2026-11-13.