Can Clomipramine (Anafranil) Be Prescribed with Bupropion?
No, clomipramine and bupropion should not be routinely prescribed together due to significant safety concerns, particularly the substantially increased risk of seizures when these medications are combined.
Primary Safety Concern: Seizure Risk
The combination of clomipramine (a tricyclic antidepressant) and bupropion poses a compounded seizure risk that makes this combination particularly hazardous:
Bupropion's Seizure Profile
- Bupropion lowers the seizure threshold and carries an inherent seizure risk of approximately 0.1% at recommended doses 1
- The FDA label explicitly warns against using bupropion with other antidepressants that lower seizure threshold 2
- Bupropion is contraindicated in patients with seizure disorders 3, 1, 3
Documented Case Evidence
A published case report directly demonstrates the danger of this specific combination: A patient developed prolonged seizure activity after combined use of bupropion and clomipramine, with EEG showing frequent generalized spike and wave complexes that persisted even after discontinuation of both drugs 4. This represents permanent neurological harm from the combination.
Pharmacokinetic Drug Interaction
Beyond the additive seizure risk, there is a significant metabolic interaction:
- Bupropion is a potent CYP2D6 inhibitor 2
- Clomipramine is metabolized by CYP2D6
- Bupropion can increase plasma concentrations of tricyclic antidepressants like clomipramine 2
- This interaction can lead to tricyclic toxicity (cardiac arrhythmias, anticholinergic crisis, hypotension)
The FDA label specifically lists tricyclic antidepressants (including imipramine, desipramine, and nortriptyline—drugs in the same class as clomipramine) as requiring dose reduction when combined with bupropion 2.
Clinical Guidance from Guidelines
The FDA label states: "Use extreme caution when coadministering bupropion with other drugs that lower the seizure threshold (e.g., other bupropion products, antipsychotics, antidepressants)" 2. While this technically allows the combination with "extreme caution," the documented case of permanent seizure activity 4 and the pharmacokinetic interaction make this combination inadvisable in routine practice.
Older guidelines from 2002 note: "There are no studies of the combination of bupropion and stimulants...clinicians should proceed with caution in combining these agents until further studies are available" 5. This same principle of avoiding unstudied, potentially dangerous combinations applies even more strongly to bupropion plus clomipramine given the documented seizure case.
Safer Alternatives
If treating depression requiring combination therapy or switching:
For switching antidepressants:
- Switch from clomipramine to bupropion (or vice versa) with appropriate washout period
- No evidence suggests superiority of clomipramine over other antidepressants that would justify the risk 6, 7
For augmentation strategies:
- If clomipramine is essential, consider augmentation with agents that don't lower seizure threshold
- If bupropion is preferred (e.g., for smoking cessation, avoiding sexual side effects), use SSRIs instead of tricyclics 1
Critical Caveats
- Never combine in patients with any seizure risk factors: history of seizures, brain metastases, eating disorders, alcohol withdrawal, head trauma, or CNS tumors
- If combination is absolutely unavoidable (extremely rare circumstances): Use lowest possible doses, obtain baseline EEG, counsel patient extensively on seizure warning signs, and monitor with extreme vigilance
- The case report showing persistent epileptiform discharges after discontinuation 4 suggests potential for permanent neurological damage
Bottom line: The documented case of seizure activity, FDA warnings about combining antidepressants that lower seizure threshold, and the CYP2D6 interaction make this combination contraindicated in standard clinical practice.