Blood Pressure Effects of Wellbutrin (Bupropion)
Wellbutrin typically increases systolic blood pressure by approximately 1-6 mmHg and diastolic blood pressure by approximately 1-8 mmHg, with the effect being modest but clinically significant in patients with pre-existing hypertension.
Magnitude of Blood Pressure Increase
According to the FDA drug label, bupropion can result in elevated blood pressure and hypertension 1. The most precise data comes from clinical trials in seasonal affective disorder where:
- Mean systolic BP increase: 1.3 mmHg (statistically significant, p=0.013)
- Mean diastolic BP increase: 0.8 mmHg (not statistically significant, p=0.075) 1
However, these are average effects. In real-world clinical practice, the increases can be more substantial:
- In ADHD patients specifically, bupropion increased systolic BP by 5.9 mmHg (p<0.05) 2
- In depressed patients, bupropion increased supine diastolic BP by 5.6-7.5 mmHg at different time points 3
- Another study in healthy volunteers showed diastolic BP increased to 67.9 mmHg vs 62.5 mmHg on placebo (approximately 5.4 mmHg increase) 4
Critical Considerations for Your Patient with Hypertension
In patients with pre-existing hypertension, the risk is substantially higher. The FDA label specifically warns that in patients with stable congestive heart failure, bupropion was associated with exacerbation of pre-existing hypertension in 2 subjects, leading to discontinuation 1. In cardiac patients, bupropion caused a rise in supine blood pressure, and treatment was discontinued in 14% of patients due to adverse effects, including exacerbation of baseline hypertension in two patients 5.
Incidence of Treatment-Emergent Hypertension
- 2% of patients (11/537) on bupropion developed hypertension as an adverse reaction in SAD trials, compared to 0% on placebo 1
- In ADHD medication studies, 10% of patients on active medication (including bupropion) developed new-onset hypertension (BP ≥140/90) compared to 8% on placebo 2
Monitoring Requirements
The FDA mandates that blood pressure must be assessed before initiating Wellbutrin and monitored periodically during treatment 1. This is non-negotiable, particularly in your patient who already has hypertension.
Risk Amplification Factors
The risk of hypertension is significantly increased if bupropion is used concomitantly with:
- MAOIs
- Other drugs that increase dopaminergic or noradrenergic activity 1
When combined with nicotine replacement therapy, the hypertension risk increases substantially (6.1% vs 2.5% with bupropion alone) 1.
Clinical Decision-Making Algorithm
For an adult with ADHD and hypertension:
Ensure hypertension is optimally controlled before initiating bupropion (target <140/90 mmHg per guidelines 6, 7)
Baseline BP measurement is mandatory 1
Expect a 2-6 mmHg increase in systolic BP and 1-8 mmHg increase in diastolic BP - plan accordingly with your antihypertensive regimen
Monitor BP within the first week (when the 5.6 mmHg diastolic increase was observed 3), then at 2-4 weeks, and periodically thereafter
Be prepared to discontinue if BP becomes uncontrolled or increases significantly (>10 mmHg sustained increase warrants reassessment)
Important Caveats
- The blood pressure effects appear dose-dependent - most patients in trials were on 270-300 mg/day 1
- Effects are sustained over time - not just transient 2
- Individual variability is high - some patients have minimal changes while others develop frank hypertension requiring discontinuation
- Heart rate also increases by approximately 7 beats per minute 2, 4, which may compound cardiovascular risk
Bottom line: In your patient with both ADHD and hypertension, bupropion will likely raise BP by 2-6/1-8 mmHg on average, but individual responses vary widely, and approximately 10% may develop treatment-emergent hypertension requiring intervention. Close monitoring is essential, and the hypertension should be well-controlled before starting bupropion.