I am taking Strattera (atomoxetine) 40 mg and experiencing increased anxiety; what should I do?

Managing Increased Anxiety on Strattera 40mg

Contact your prescriber immediately to discuss this anxiety, as it may represent a known adverse effect requiring dose adjustment, medication discontinuation, or additional monitoring—particularly important during the early treatment phase or after dose changes. 1

Understanding Anxiety as an Adverse Effect

Atomoxetine (Strattera) carries specific warnings about behavioral changes including anxiety, particularly during initial treatment and dose adjustments:

• Regulatory warnings from the FDA and Australian Therapeutic Goods Administration explicitly state that patients should be monitored closely for "anxiety, agitation, panic attacks, insomnia, irritability, hostility, aggressiveness, impulsivity, and unusual changes in behavior, especially during the first few months of treatment or at times of dose change." 1

• Anxiety is a recognized adverse effect that should prompt immediate contact with your prescriber, as these symptoms may indicate the need for medication adjustment or discontinuation. 2

• The FDA Medication Guide specifically instructs patients to "watch for anxiety" and states these signs should be reported to the doctor "right away if they are new, sudden, or severe." 2

Immediate Action Steps

Call your prescriber as soon as possible to report the increased anxiety. Your doctor needs to assess: 2

• Severity and timing: When the anxiety started relative to starting Strattera or any recent dose changes
• Associated symptoms: Whether you're experiencing other concerning symptoms like agitation, panic attacks, insomnia, irritability, or hostility 1
• Suicidality screening: Particularly important in children and adolescents, as atomoxetine carries a black box warning for increased suicidal ideation in this population 1

Management Options Your Prescriber May Consider

Dose Adjustment Strategy

Splitting the daily dose may reduce adverse effects: 1

• Atomoxetine can be administered as two equal doses (morning and evening) rather than once daily to minimize side effects 1
• Some patients tolerate evening-only dosing if daytime anxiety is problematic 1

Slower titration if you were increased too rapidly:

• Starting with subtherapeutic "test doses" is advisable specifically because anxiety can be an initial adverse effect 3
• Conservative titration involves smaller dose increments with adequate time between increases 3

Medication Discontinuation

Stopping atomoxetine may be necessary if: 1

• Anxiety is severe, abrupt in onset, or significantly impairing function
• You develop other concerning psychiatric symptoms (agitation, hostility, suicidal thoughts)
• The benefit-to-harm ratio is unfavorable

Alternative Medication Considerations

If atomoxetine is discontinued due to anxiety, your prescriber may consider: 1

• Stimulant medications (methylphenidate or amphetamines) as first-line ADHD treatment, which have different side effect profiles 1
• Alpha-2 agonists (guanfacine or clonidine) if you have comorbid anxiety, as these may actually help anxiety symptoms 1
• Different non-stimulant options such as viloxazine ER, which has shown better tolerability than atomoxetine in some patients 4

Important Context About Atomoxetine and Anxiety

Paradoxical Effects in Comorbid Anxiety

Interestingly, research shows atomoxetine can improve anxiety symptoms in patients with ADHD and comorbid anxiety disorders: 5, 6, 7

• In adults with ADHD and social anxiety disorder, atomoxetine significantly reduced both ADHD symptoms and anxiety symptoms 5
• As adjunctive treatment for partially responsive generalized anxiety, atomoxetine improved anxiety outcomes 6
• Systematic reviews confirm atomoxetine does not typically exacerbate and often reduces anxiety in young patients with comorbid ADHD and anxiety 7

However, this does not negate your individual experience—some patients do develop increased anxiety as an adverse effect, particularly during initial treatment. 1, 3, 2

Critical Safety Monitoring

Your prescriber should be monitoring for: 1

• Suicidal ideation: Especially if you're under 25 years old, as atomoxetine increases this risk in children and adolescents 1
• Behavioral activation: Emergence of mania, hypomania, or aggressive behavior 1
• Cardiovascular parameters: Blood pressure and heart rate, which atomoxetine can increase 8

Common Pitfalls to Avoid

• Do not abruptly stop atomoxetine without consulting your prescriber, as medication changes should be supervised 2
• Do not assume anxiety will resolve on its own—this symptom requires medical evaluation 2
• Do not take additional doses thinking more medication will help; this could worsen anxiety 2
• Avoid combining with other serotonergic medications without medical supervision, as this increases risk of adverse effects 1, 3