Atomoxetine (Strattera)

What atomoxetine is

Atomoxetine is a medication sold under the brand name Strattera. It works mainly by boosting norepinephrine, one of the chemical messengers nerve cells use to communicate, which helps with focus and attention. Unlike the stimulant medicines used for the same purpose, it is not a controlled substance and it works gradually rather than right away. It comes as a capsule taken by mouth.

What it treats

Your clinician might suggest atomoxetine for one of these, among other possible off-label uses:

• Attention-deficit/hyperactivity disorder (ADHD)

Whether it is a good fit depends on several factors, including your history and what you are working on. As with everything in psychiatry, that is decided case by case.

How it works

Honestly, no one knows with complete certainty how atomoxetine produces its benefit. What robust research supports is that it increases the amount of norepinephrine available in the brain, which can make it easier to focus and follow through. The biology is only part of the picture: how much a medication helps, and how it feels, is individual. Two people on the same medication can have very different experiences.

How to take it

There is no single right way to take atomoxetine; it depends on you and your clinician. Because it builds up gradually, it is taken every day rather than only when you need it, and the benefit tends to come on over weeks. The plan you and your clinician make together is the one to follow, not a number you read online. A few general points apply broadly:

• Take it the way you and your clinician agreed. Taking it with food can help if it bothers your stomach.
• Give it time. Unlike a stimulant, it usually takes a few weeks to show what it can do.
• If you miss a dose, ask your clinician or pharmacist what to do rather than doubling up.
• Try not to stop on your own; talk it through with your clinician first.

What to expect

This varies from person to person. Atomoxetine works gradually, so it is normal not to feel much in the first days; any benefit usually builds over a few weeks. Some side effects, if they happen, can show up earlier than the benefit, and many ease over time. If nothing has shifted after a fair trial, that is useful information, not a dead end, and there are other options. As always, this is case by case.

Side effects

Not everyone gets side effects, and many that do happen ease over the first weeks. The lists below are possibilities, not certainties.

Possible more common side effects:

• Reduced appetite, nausea, or an upset stomach
• Dry mouth
• Feeling tired or sleepy, or trouble sleeping
• Dizziness
• Headache
• Feeling irritable or moody

If any of these stick around or bother you, send a non-urgent message through the patient portal or bring it up at your next visit; often a small change helps.

Less common, but concerning side effects that could require emergency care:

• Any new or worsening thoughts of harming yourself, especially early on and in children or teens
• Signs of liver trouble: yellowing of the skin or eyes, dark urine, pain in the upper right side of the belly, or unexplained tiredness with flu-like symptoms
• Chest pain, a racing heartbeat, or fainting
• New or worsening agitation, or feeling abnormally high, wired, or out of touch with reality
• A painful erection, or one lasting more than a few hours
• Signs of an allergic reaction: rash, hives, or swelling of the face, lips, or throat

For any of these, use the help options at the top of this page: call 911 or go to the nearest emergency department for a medical emergency or severe reaction, or call or text 988 for a mental health crisis.

When to reach out, and where

For routine questions, side effects that can wait, or how things are going, send your clinician a message through the patient portal. These are part of your ongoing care and are answered in the normal course of a few business days, so they are best for things that are not urgent.

If something feels urgent, you do not need to wait for a reply. The help options at the top of this page are the fastest way to get care: 911 or the nearest emergency department for a medical emergency or severe reaction, or 988 any time for a mental health crisis or thoughts of self-harm.

Questions to ask your clinician

• What are you hoping atomoxetine will help with in my case?
• How long should I give it before we decide whether it is working?
• What should I do if I notice side effects?
• What should I watch for with my mood and my liver?
• What is the plan if this one turns out not to be the right fit?
• How will we handle stopping it, if and when we get there?