Drug interactions
Fluoxetine + Sulfasalazine
Severity: Minor
Fluoxetine and Sulfasalazine: minor interaction.
Last updated
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
SSRIs impair platelet aggregation and sulfasalazine can cause gastrointestinal irritation and, rarely, blood dyscrasias. Combined use may increase bleeding risk, which may be relevant in patients with inflammatory bowel disease.
What this interaction means in plain words
Fluoxetine and Sulfasalazine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised.
Why it happens
Possible additive bleeding tendency from SSRI-related platelet serotonin depletion; the interaction is largely theoretical.
What to do
Monitor for GI bleeding, particularly in patients with active colitis, and check blood counts as routinely advised for sulfasalazine.
What to ask your pharmacist
- Is there anything I should notice while taking both?
- Do I need to tell my doctor at the next visit?
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Other interactions of Fluoxetine
- Fluoxetine + Isocarboxazid Contraindicated
- Fluoxetine + Mavacamten Contraindicated
- Fluoxetine + Methylene blue Contraindicated
- Fluoxetine + Phenelzine Contraindicated
- Fluoxetine + Pimozide Contraindicated
- Fluoxetine + Rasagiline Contraindicated
Frequently asked questions
Can I take Fluoxetine with Sulfasalazine?
MediHelp rates the interaction as minor. Fluoxetine and Sulfasalazine have a small, usually unimportant interaction. Most people can take both; the pharmacist may still mention it so that any unexpected effect is recognised. SSRIs impair platelet aggregation and sulfasalazine can cause gastrointestinal irritation and, rarely, blood dyscrasias. Combined use may increase bleeding risk, which may be relevant in patients with inflammatory bowel disease.
How serious is the interaction between Fluoxetine and Sulfasalazine?
MediHelp rates it minor, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Monitor for GI bleeding, particularly in patients with active colitis, and check blood counts as routinely advised for sulfasalazine.
What other medicines interact with Fluoxetine?
MediHelp also lists interactions of Fluoxetine with, for example, Isocarboxazid, Mavacamten, Methylene blue. The full list is on the Fluoxetine page.
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