Can bupropion be added to a patient already taking citalopram 40 mg (Celexa) and aripiprazole 5 mg (Abilify) for depression?

Can Bupropion Be Added to Celexa 40mg and Abilify 5mg?

Yes, bupropion can be safely added to your current regimen of citalopram 40mg and aripiprazole 5mg for treatment-resistant depression, and this combination is supported by clinical evidence showing superior efficacy compared to switching strategies alone.

Evidence Supporting This Combination

The addition of bupropion to citalopram is a well-established augmentation strategy for treatment-resistant depression. Research demonstrates that combining citalopram with bupropion produces significantly better outcomes than switching to bupropion monotherapy 1. In patients who failed to respond to citalopram alone, the combination strategy achieved a 28% remission rate compared to only 7% with switching to monotherapy, with superior depression score improvements (-14.8 vs -10.1 points) 1.

The STAR*D trials, which specifically evaluated treatment options after citalopram failure, found that augmenting citalopram with bupropion SR achieved remission rates of approximately 30% 2, 3, 4. This augmentation approach was as effective as augmenting with buspirone and better tolerated, with lower discontinuation rates due to adverse events (12.5% vs 20.6%) 2, 3.

Safety Considerations With Your Current Medications

Serotonin Syndrome Risk

While you're on citalopram (an SSRI), adding bupropion carries low risk for serotonin syndrome because bupropion primarily affects dopamine and norepinephrine, not serotonin 5. The FDA label for citalopram warns about combining multiple serotonergic drugs 6, but bupropion is not primarily serotonergic. However, monitor for symptoms in the first 24-48 hours after starting or increasing doses: mental status changes (confusion, agitation), neuromuscular hyperactivity (tremors, muscle rigidity), and autonomic instability (rapid heart rate, blood pressure changes, sweating) 5.

QT Prolongation Concern

Critical consideration: You're already at the maximum FDA-approved dose of citalopram (40mg/day). Citalopram can cause QT prolongation at doses exceeding 40mg, associated with dangerous heart rhythms 5. While bupropion doesn't significantly prolong QT interval, you should have baseline and periodic ECG monitoring given you're at the maximum citalopram dose.

Interaction With Aripiprazole

Bupropion inhibits CYP2D6, which metabolizes aripiprazole 7. This means bupropion may increase aripiprazole levels, potentially enhancing both therapeutic effects and side effects. Your aripiprazole dose (5mg) is relatively low, providing a safety buffer. Monitor for increased aripiprazole-related effects: akathisia (restlessness), insomnia, or agitation 7.

Blood Pressure Monitoring

Bupropion can increase blood pressure and heart rate 8. The FDA label reports hypertension in approximately 2% of patients, with mean systolic blood pressure increases of 1.3 mmHg 8. Combined with your existing medications, regular blood pressure monitoring is essential, especially during the first 12 weeks.

Practical Implementation

Dosing Strategy

• Start bupropion SR 150mg once daily in the morning for 3-7 days
• If tolerated, increase to 150mg twice daily (or 300mg XL once daily)
• Maximum dose: 400mg/day (divided doses for SR formulation)
• Take in the morning to minimize insomnia risk 8

Monitoring Protocol

First 2 weeks:

• Monitor for activation symptoms: anxiety, agitation, insomnia, restlessness
• Check blood pressure weekly
• Watch for serotonin syndrome symptoms (though risk is low)

Weeks 2-12:

• Blood pressure checks every 2-4 weeks
• Assess depression response at 4-6 weeks
• Monitor for seizure risk factors (avoid if history of seizures, eating disorders, or abrupt alcohol/benzodiazepine withdrawal) 8

Contraindications and Warnings

Do not add bupropion if you have:

• History of seizures or conditions that lower seizure threshold
• Current or prior diagnosis of bulimia or anorexia nervosa
• Abrupt discontinuation of alcohol or sedatives
• Taking MAO inhibitors (must wait 14 days) 8

Use caution if you have:

• Bipolar disorder risk (bupropion can trigger mania) 8
• Angle-closure glaucoma 8
• Hepatic or renal impairment (dose adjustment needed)

Expected Outcomes

The combination of citalopram and bupropion was well-tolerated with no greater side effect burden than monotherapy in clinical studies 1, 9. Common side effects include dry mouth, insomnia, headache, nausea, and tremor, but these are generally manageable 8.

If you achieve less than 3% weight loss after 12 weeks (if using bupropion for depression, not weight management), reassess the treatment strategy 2. However, for depression specifically, evaluate response at 6-8 weeks.

Alternative Consideration

Your current regimen already includes aripiprazole 5mg, which itself is an evidence-based augmentation strategy for antidepressant-refractory depression. Recent data suggests aripiprazole augmentation may be superior to bupropion augmentation in older adults, with 28.9% remission versus 28.2% for bupropion augmentation 10. However, you're already on aripiprazole. If depression persists despite adding bupropion, consider increasing aripiprazole to 10mg (optimal dose range 2-10mg based on dose-response data) 11 before adding additional agents.

Bottom Line

Adding bupropion to your current regimen is a reasonable, evidence-based strategy that has demonstrated superior efficacy compared to switching medications alone. The combination is generally well-tolerated, but requires monitoring for blood pressure changes, potential aripiprazole level increases, and activation symptoms. Start with 150mg daily and titrate based on response and tolerability, with close monitoring in the first few weeks.