How should I initiate Wellbutrin (bupropion) therapy, including starting dose, titration schedule, contraindications, and monitoring?

Initiating Wellbutrin (Bupropion) Therapy

Start Wellbutrin XL at 150 mg once daily for 4 days, then increase to the target dose of 300 mg once daily for major depressive disorder. 1

Starting Dose and Titration

For major depressive disorder:

• Begin with 150 mg once daily
• After 4 days, increase to 300 mg once daily (the usual target dose)
• Maximum dose: 450 mg daily (though most patients respond to 300 mg) 1

For seasonal affective disorder:

• Start 150 mg once daily for 1 week
• Then increase to 300 mg once daily
• Initiate in autumn (September-November) before symptoms begin
• Continue through winter, then taper over 2 weeks starting in late March 1

The gradual dose escalation is critical to minimize seizure risk, which is the most serious adverse effect and is dose-dependent. 1, 2

Absolute Contraindications

Do not prescribe bupropion if the patient has:

• Seizure disorder (current or history)
• Eating disorders (bulimia or anorexia nervosa - current or prior diagnosis)
• Abrupt discontinuation of alcohol, benzodiazepines, barbiturates, or antiepileptic drugs (lowers seizure threshold)
• MAOI use within 14 days (or concurrent linezolid/IV methylene blue)
• Known hypersensitivity to bupropion 1

Monitoring Requirements

Begin monitoring within 1-2 weeks of initiation 3:

• Suicidality screening: Highest risk in first 1-2 months, especially in patients 18-24 years old. Monitor for agitation, irritability, unusual behavior changes, worsening depression, and suicidal ideation 3, 1

• Blood pressure: Bupropion can increase blood pressure. Check before starting and periodically during treatment 1

• Therapeutic response: Assess at 6-8 weeks. If inadequate response, modify treatment (switch or augment) 3

• Neuropsychiatric symptoms: Watch for mood changes, psychosis, hallucinations, paranoia, aggression, anxiety, or panic 1

Special Populations Requiring Dose Adjustment

Hepatic impairment:

• Moderate to severe: 150 mg every other day
• Mild: Consider reducing dose and/or frequency 1

Renal impairment: Consider reducing dose and/or frequency 1

Key Advantages Over Other Antidepressants

Bupropion has significantly lower rates of sexual dysfunction compared to SSRIs - a major quality of life consideration. 3, 4 It also causes less somnolence and weight gain than many alternatives. 5, 6 This makes it particularly valuable when these side effects would be problematic or when patients have failed SSRIs due to sexual dysfunction.

Treatment Duration

• First episode: Continue for 4-9 months after achieving remission
• Recurrent depression (≥2 episodes): Consider longer maintenance therapy 3

Common Pitfalls to Avoid

1. Do not exceed 450 mg daily - seizure risk increases substantially above this dose
2. Do not skip the gradual titration - jumping directly to 300 mg increases seizure risk
3. Screen carefully for eating disorders - patients may not volunteer this history
4. Do not combine with MAOIs - requires 14-day washout period
5. Screen for bipolar disorder before initiating - bupropion can trigger mania/hypomania 1

Expected Timeline

• Initial improvement: 2 weeks
• Full therapeutic effect: 4-6 weeks 2, 5
• If no response by 6-8 weeks, switch or augment therapy 3