Also known as: Strattera (brand name, UK and US)
Atomoxetine is a non-stimulant ADHD medication that works by blocking the reuptake of norepinephrine. Unlike stimulant medications, it does not produce an immediate noticeable effect. Instead, it builds up over 4 to 6 weeks to provide continuous, around-the-clock coverage. ADHDose tracks your daily patterns on atomoxetine so you and your specialist can see whether the medication is reaching full effect.
Atomoxetine works through a completely different mechanism from stimulant medications like Elvanse, Concerta XL, or Ritalin. Stimulants increase dopamine directly and take effect within an hour. Atomoxetine blocks the reuptake of norepinephrine, a related but different neurotransmitter. This means the medication's therapeutic effect builds gradually over weeks rather than hours.
There is no daily rise-and-fall curve. Once atomoxetine reaches steady state (typically 4 to 6 weeks), it provides a consistent level of coverage around the clock. There is no peak, no wear-off, and no wind-down window to consider. For many people, this is precisely why atomoxetine is prescribed: it avoids the daily cycle that some find disruptive with stimulants.
The trade-off is speed. On a stimulant, you know within the first day whether something is happening. On atomoxetine, the first weeks can feel ambiguous. You may notice subtle changes in organisation, emotional reactivity, or working memory before any clear improvement in focus. Tracking daily during this period is how you and your specialist distinguish gradual improvement from no response.
NICE recommends stimulants as first-line treatment for ADHD. Atomoxetine is typically considered when stimulants are ineffective, cause significant side effects, or are clinically unsuitable. Common reasons include:
Stimulant side effects were intolerable: appetite suppression, sleep disruption, or cardiovascular concerns that did not resolve with dose adjustment or medication switching.
Co-occurring conditions: atomoxetine can be preferable when anxiety, tics, or substance use history make stimulants a less suitable option.
Preference for continuous coverage: some people prefer a medication that works steadily without a daily on/off cycle.
Your specialist will discuss the reasons for recommending atomoxetine based on your individual clinical picture.
The most critical period on atomoxetine is the first 4 to 6 weeks. During this time, the medication is building to therapeutic levels. What you experience week by week varies, and the changes are often subtle enough to miss without tracking.
Most people start at a low dose (typically 40mg for adults, sometimes 25mg) and increase after 1 to 2 weeks. The target dose is usually based on body weight. Your specialist will adjust based on your response and any side effects.
Common early side effects include reduced appetite, nausea, dry mouth, and fatigue. These often settle within the first 2 to 3 weeks. If they persist, your specialist may adjust the dose or timing.
This is where daily tracking matters most. The change on atomoxetine is gradual. By week 4, you may not remember how week 1 felt. ADHDose captures your daily focus, sleep, and mood so that when you sit down with your specialist at your review, you have data showing whether the medication is making a measurable difference.
Atomoxetine is metabolised by the CYP2D6 enzyme. How quickly your body processes this enzyme varies significantly between individuals. Approximately 93% of people are "extensive metabolisers" with a half-life of about 5 hours. About 7% of Caucasians are "poor metabolisers" with a half-life of up to 22 hours.
If you are a poor metaboliser, atomoxetine stays in your system much longer per dose. This can mean greater effect but also more pronounced side effects. Your specialist may test for CYP2D6 status or adjust dosing based on your response.
You do not need to know your metaboliser status to use ADHDose. The app tracks your daily experience and patterns regardless of the underlying pharmacokinetics. Over time, your data will reflect how your body processes the medication, even if the mechanism is not explicitly measured.
Unlike stimulant medications, atomoxetine does not typically cause sleep difficulty related to medication timing. Because there is no daily wear-off cycle, there is no "wind-down window" to manage. Some people find atomoxetine mildly sedating and prefer to take it in the evening. Others take it in the morning. Your specialist will advise based on your response.
If you experience sleep changes on atomoxetine, tracking your sleep quality daily helps distinguish medication effects from other factors. ADHDose logs this alongside your focus and mood data.
Atomoxetine should not be stopped abruptly. If you and your specialist decide to discontinue, the dose is tapered gradually. This is different from stimulant medications, which can be stopped without tapering. Follow your specialist's guidance on the tapering schedule.
Medication breaks (common with stimulants during holidays or weekends) are not appropriate for atomoxetine. It must be taken daily to maintain its therapeutic effect.
Because atomoxetine provides continuous coverage, ADHDose does not model a daily concentration curve (there is no meaningful peak and trough to visualise). Instead, the app focuses on what matters most during non-stimulant treatment: tracking your daily focus, mood, sleep, and side effects over the weeks it takes to reach full effect.
After 14 days, the Insights tab begins showing trends. After 28 days, the report compares your first fortnight to your second, giving you and your specialist clear data on whether the medication is working. This is the evidence base that makes the first review appointment productive rather than a guessing game.
See how your focus, sleep, and mood change over the weeks as atomoxetine builds to full effect. Data for your specialist, not guesswork.
Download free →This page is for informational purposes only. ADHDose is not a medical device and does not provide medical advice, diagnosis, or treatment. Always consult your prescribing doctor or specialist before making changes to your medication.