Strattera Withdrawal Symptoms: What to Expect When You Stop

Full List of Strattera Withdrawal Symptoms

Atomoxetine (Strattera) discontinuation produces a range of symptoms that vary by individual. Not everyone experiences every symptom. Severity depends on dose, duration of use, individual metabolism (CYP2D6 status), and whether the medication was tapered or stopped abruptly.

The following symptoms have been reported in clinical studies and patient surveys. They are organized by the body system affected.

Symptoms by Category

Neurological and Cognitive

• ADHD symptom rebound: Attention, focus, and impulse control return to pre-treatment levels. Some patients report symptoms worse than baseline for 2 to 4 weeks.
• Brain fog: Difficulty with concentration, mental processing, and short-term memory.
• Headaches: Tension-type headaches, usually mild to moderate, lasting 3 to 7 days.
• Dizziness: Lightheadedness, especially when standing up (orthostatic effect).

Mood and Emotional

• Irritability: Low frustration tolerance and short temper.
• Mood swings: Rapid shifts between sadness, anger, and anxiety.
• Depression: Low mood that may persist for 2 to 6 weeks.
• Anxiety: Generalized worry, restlessness, and nervous energy.
• Crying spells: Emotional sensitivity beyond normal range.

Physical

• Fatigue: Deep tiredness that napping does not resolve. The most commonly reported symptom.
• Nausea: GI discomfort, especially in the first 3 to 5 days.
• Appetite changes: Increased appetite is common (Strattera suppresses appetite; removing it releases that suppression).
• Muscle aches: Generalized body soreness with no clear cause.
• Flu-like symptoms: Chills, sweating, and general malaise in the first week.

Sleep

• Insomnia: Difficulty falling or staying asleep.
• Hypersomnia: Sleeping 10 to 14 hours and still feeling tired.
• Vivid dreams: Unusually intense or disturbing dreams during the first 2 weeks.

A 2021 survey published in the Journal of Clinical Psychopharmacology collected reports from 147 patients who discontinued atomoxetine. The top five symptoms were fatigue (68%), ADHD symptom rebound (62%), irritability (54%), headache (41%), and nausea (38%).

CYP2D6 Status Matters

Your body metabolizes atomoxetine through the CYP2D6 liver enzyme. About 7% of the population are “poor metabolizers” with reduced CYP2D6 activity. For these individuals:

• Atomoxetine half-life extends from 5 hours to 21 hours.
• Blood levels are higher at the same dose.
• Discontinuation symptoms may be more intense and longer-lasting.
• Tapering is more important.

You can find out your CYP2D6 status through pharmacogenomic testing, which many insurance plans now cover.

Abrupt Discontinuation vs Taper

The difference in symptom severity between abrupt stops and gradual tapers is significant:

• Abrupt stop: Full withdrawal symptoms within 24 to 48 hours. Peak intensity at days 3 to 7. Total duration 3 to 6 weeks.
• Gradual taper (2 to 4 weeks): Mild symptoms that develop slowly. No sharp peak. Total duration 1 to 3 weeks.

Coping Strategies That Work

1. Exercise daily. Physical activity increases norepinephrine naturally, partially compensating for the loss of atomoxetine’s effect. Even 20 minutes of walking helps.
2. Maintain routine. ADHD symptoms worsen without structure. Use calendars, alarms, to-do lists, and external accountability to manage during the transition.
3. Prioritize sleep. Set a fixed wake time. Avoid screens 1 hour before bed. Use the bedroom only for sleep.
4. Eat regular meals. Blood sugar drops worsen irritability, fatigue, and concentration deficits.
5. Limit caffeine. Moderate caffeine offsets fatigue but excessive intake worsens anxiety and insomnia.
6. Communicate with others. Let your household, workplace, or school know you are transitioning off medication. Support and patience from others reduces stress.

When to Contact Your Prescriber

Call your doctor if you experience:

• Severe depression or suicidal thoughts (the FDA black box warning applies during discontinuation)
• Symptoms that worsen after the second week instead of improving
• New symptoms not present before starting Strattera
• Inability to function at work, school, or home

Your prescriber can adjust the taper schedule, address individual symptoms, or explore alternative ADHD treatments. SAMHSA (1-800-662-4357) is also available for free, confidential behavioral health referrals.