Bupropion vs Sertraline

Both bupropion and sertraline are effective antidepressants with well-established efficacy in randomized controlled trials. The 2018 Cipriani meta-analysis found both to be effective for MDD, with sertraline ranking slightly higher for overall efficacy and bupropion ranking among the best for tolerability.

For major depressive disorder, head-to-head studies suggest comparable overall response rates. A large 2006 study comparing bupropion XL 300 mg and sertraline 100 mg found similar remission rates at 8 weeks. However, the two medications may be better suited for different depressive subtypes.

Bupropion may be particularly effective for depression characterized by fatigue, low energy, poor concentration, hypersomnia, and psychomotor retardation — symptoms sometimes called "atypical" or "anergic" depression. Its dopaminergic and noradrenergic properties provide activating effects that address these symptoms.

Sertraline is generally preferred for depression with comorbid anxiety, given its broader anxiety-related FDA approvals. Bupropion may worsen anxiety in some patients, particularly at higher doses, due to its stimulating properties.

Bupropion is the only antidepressant FDA-approved for smoking cessation (as Zyban), making it uniquely valuable for depressed patients who also want to quit smoking. It reduces nicotine cravings and withdrawal symptoms through its dopaminergic mechanism.

The side effect profiles of bupropion and sertraline are remarkably different, and these differences are often the primary factor in choosing between them.

Sexual dysfunction is one of the most significant differences. SSRIs like sertraline commonly cause decreased libido, delayed ejaculation/orgasm, and anorgasmia in approximately 10-16% of patients. Bupropion has minimal sexual side effects — in fact, it is sometimes added to SSRI therapy specifically to counteract SSRI-induced sexual dysfunction ^[5].

Weight effects also differ markedly. Sertraline is considered weight-neutral to slightly weight-gaining. Bupropion is associated with modest weight loss (1-2 kg) in many patients, making it the preferred antidepressant for patients concerned about weight.

Bupropion can cause insomnia ^[2], agitation, dry mouth ^[3], and headache. Its most significant risk is a dose-dependent seizure risk ^[2]: at doses above 450 mg/day, the seizure risk ^[2] increases significantly. It is contraindicated in patients with seizure disorders, eating disorders (anorexia/bulimia), or those undergoing abrupt alcohol/benzodiazepine withdrawal.

Sertraline commonly causes nausea, diarrhea, insomnia ^[2] or somnolence, and the sexual dysfunction ^[5] mentioned above. GI side effects, particularly diarrhea, are more common with sertraline than with bupropion.

Both medications are available as affordable generics. Generic sertraline ^[3] costs approximately $4-$12 per month. Generic bupropion ^[2] costs approximately $10-$25 per month, with the XL (extended-release) formulation being more expensive than the SR (sustained-release) version.

Both are covered by most insurance plans. The smoking cessation formulation (Zyban) may have different coverage than the antidepressant formulations, though chemically they are the same medication.

Sertraline is taken once daily ^[3] as a tablet. Bupropion dosing depends on the formulation: bupropion SR is taken twice daily, while bupropion XL is taken once daily. The XL formulation is generally preferred for convenience and smoother drug levels.

Bupropion should not be taken close to bedtime due to its stimulating effects. Sertraline can be taken morning or evening. Neither requires routine blood monitoring.

Bupropion may be the better choice for patients with depression accompanied by fatigue and low energy, patients concerned about sexual dysfunction or weight gain, patients who also want to quit smoking, or patients who have experienced intolerable sexual side effects on SSRIs.

Sertraline may be the better choice for patients with depression and comorbid anxiety disorders (panic, PTSD, OCD, social anxiety, PMDD), patients at risk for seizures (where bupropion is contraindicated), and patients with eating disorders (bupropion is contraindicated in anorexia/bulimia).

The two medications are sometimes used together, as their complementary mechanisms can be additive. Combining an SSRI with bupropion is one of the most common augmentation strategies in treatment-resistant depression.

Neither medication should be stopped abruptly. While bupropion has a lower risk of discontinuation syndrome than sertraline, gradual tapering is recommended for both. Work with your healthcare provider to determine which medication best addresses your specific symptoms and concerns.