SAFE — No Known Interaction
🟢 SAFE — Vitamin K2 and Fluoxetine can be taken together safely.
Evidence level: MODERATE
Vitamin K2 and Fluoxetine are generally safe to take together. Unlike St. John's Wort or 5-HTP, Vitamin K2 does not have significant serotonergic activity and is not expected to interfere with SSRI therapy.
No clinically significant interaction between Vitamin K2 and Fluoxetine has been documented in medical literature or FDA drug labeling.
Vitamin K2 and Fluoxetine appear safe to combine. That said, always tell your psychiatrist or prescribing doctor that you're taking Vitamin K2. Start new supplements one at a time so you can identify any effects. If you notice increased anxiety, mood changes, or unusual drowsiness, consult your doctor.
Take Fluoxetine at your consistent daily time. Vitamin K2 with food. B vitamins (especially B6, B12, and folate) support neurotransmitter synthesis and may enhance SSRI efficacy. Vitamin D optimization is increasingly recognized as important for mood disorders. No significant timing conflict between vitamins and SSRIs.
Higher risk for: elderly, those on multiple serotonergic drugs, people with liver impairment, CYP2D6 poor metabolizers, recent dose changes, or concurrent use of MAOIs or triptans.
Monitor for mood changes, unusual drowsiness, or digestive upset when starting Vitamin K2 alongside Fluoxetine. Some supplements can influence how antidepressants work. Watch for: changes in energy levels, appetite, sleep patterns, or increased nervousness. Red flags requiring immediate care: confusion, rapid heartbeat, muscle stiffness, excessive sweating, or high fever (possible serotonin-related reaction). Always inform your prescriber about supplement use.
No urgent need to discuss, but always keep your doctor informed of your full supplement and medication list. An up-to-date list helps them make the best treatment decisions.
Safe combination at standard doses. Continue your medication as prescribed. Inform your doctor or pharmacist that you are using both, so they can monitor for any changes over time.
Vitamin K2 and Fluoxetine are generally safe to take together. Unlike St. John's Wort or 5-HTP, Vitamin K2 does not have significant serotonergic activity and is not expected to interfere with SSRI therapy.
Take Fluoxetine at your consistent daily time. Vitamin K2 with food. B vitamins (especially B6, B12, and folate) support neurotransmitter synthesis and may enhance SSRI efficacy. Vitamin D optimization is increasingly recognized as important for mood disorders. No significant timing conflict between vitamins and SSRIs.
Monitor for mood changes, unusual drowsiness, or digestive upset when starting Vitamin K2 alongside Fluoxetine. Some supplements can influence how antidepressants work. Watch for: changes in energy levels, appetite, sleep patterns, or increased nervousness. Red flags requiring immediate care: confusion, rapid heartbeat, muscle stiffness, excessive sweating, or high fever (possible serotonin-related reaction). Always inform your prescriber about supplement use.
Safe combination at standard doses. Continue your medication as prescribed. Inform your doctor or pharmacist that you are using both, so they can monitor for any changes over time.
No urgent need to discuss, but always keep your doctor informed of your full supplement and medication list. An up-to-date list helps them make the best treatment decisions.
Or browse the full interaction database (121,000+ pairs).