Citalopram and Fluvoxamine interaction

Citalopram and Fluvoxamine: both prescribing labels flag this combination with the strongest language, such as a contraindication, a boxed warning, or an instruction to avoid it.

Major

Do not combine without a prescriber's guidance. The label language below is the strongest FDA uses.

What the FDA labels say

From the Citalopram label · effective 2025-10-07

Major

Serotonin Syndrome: Increased risk when co-administered with other serotonergic agents, but also when taken alone.

Warnings and precautionsby drug classView label on DailyMed
Major

Avoid use of Citalopram Capsules in CYP2C19 poor metabolizers, patients receiving concomitant cimetidine or another CYP2C19 inhibitor, patients with hepatic impairment, and patients who are greater than 60 years of age, because Citalopram Capsules are only available in a 30 mg dose strength and dosage adjustments are not possible [see Drug Interactions ( 7 ),…

Warnings and precautionsby drug classView label on DailyMed
Major

If concomitant use of Citalopram Capsules with other serotonergic drugs is clinically warranted, inform patients of the increased risk for serotonin syndrome and monitor for symptoms.

Warnings and precautionsby drug classView label on DailyMed
Major

CYP2C19 inhibitors and CYP2C19 poor metabolizers: Avoid concomitant use.

Drug interactionsby drug classView label on DailyMed
Major

Intervention: Avoid concomitant use of Citalopram Capsules with CYP2C19 inhibitors [see Warnings and Precautions ( 5.2 )].

Drug interactionsby drug classView label on DailyMed

From the Fluvoxamine (fluvoxamine maleate) label · effective 2026-04-23

Major

Anyone considering the use of Fluvoxamine Maleate Tablets or any other antidepressant in a child, adolescent, or young adult must balance this risk with the clinical need.

Boxed warningby drug classView label on DailyMed
Major

If concomitant use of Fluvoxamine Maleate Tablets with other serotonergic drugs is clinically warranted, patients should be made aware of a potential increased risk for serotonin syndrome, particularly during treatment initiation and dose increases.

Warnings and precautionsby drug classView label on DailyMed
Major

If concomitant use of Fluvoxamine Maleate Tablets with other serotonergic drugs is clinically warranted, inform patients of the increased risk for serotonin syndrome and monitor for symptoms.

Warnings and precautionsby drug classView label on DailyMed
Moderate

The risk is increased with concomitant use of other serotonergic drugs (including triptans, tricyclic antidepressants, fentanyl, meperidine, methadone, lithium, tramadol, tryptophan, buspirone, amphetamines, and St.

Warnings and precautionsby drug classView label on DailyMed
Moderate

Lithium: As with other serotonergic drugs, lithium may enhance the serotonergic effects of fluvoxamine and, therefore, the combination should be used with caution.

Drug interactionsby drug classView label on DailyMed

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Not medical advice. Interaction Checker quotes FDA label text and NIH fact sheets. Whether an interaction matters for you depends on doses, timing, kidney and liver function, and other conditions. Confirm with a pharmacist or prescriber.