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Caffeine + Fluvoxamine

MAJOR — Use With Caution

🔴 MAJOR — Fluvoxamine increases Caffeine levels 5-fold. Drastically reduce caffeine.

Evidence level: STRONG

What this interaction means

Fluvoxamine almost completely blocks caffeine breakdown. One cup of coffee will affect you like five cups and last all day and night.

How it works (mechanism)

Fluvoxamine is the most potent CYP1A2 inhibitor among SSRIs, increasing caffeine half-life from ~5h to ~31h. Caffeine levels increase ~5x.

Practical advice

Reduce caffeine to 20% of your normal intake or eliminate it. One small cup of coffee may equal five. Switch to decaf. This effect persists throughout fluvoxamine treatment.

Timing

Take Fluvoxamine at the same time daily. Most SSRIs can be taken with or without food, though food may reduce GI side effects. Caffeine — if it's high in tyramine (aged cheese, cured meats, fermented foods), this is mainly a concern with MAOIs, not SSRIs. SSRIs are generally food-flexible.

Risk factors

Heavy caffeine users, anxiety (common in OCD), insomnia

Symptoms to watch for

Severe insomnia, anxiety, palpitations, tremor, restlessness

What to tell your doctor

Discuss caffeine elimination when starting fluvoxamine

Safer alternatives

Discuss this combination with your prescriber. They may adjust timing, dosing, or switch to an alternative with fewer interaction risks. Never stop an antidepressant abruptly — taper under medical guidance.

Frequently asked questions

Can I take Caffeine and Fluvoxamine together?

Fluvoxamine almost completely blocks caffeine breakdown. One cup of coffee will affect you like five cups and last all day and night.

When should I take Caffeine vs Fluvoxamine?

Take Fluvoxamine at the same time daily. Most SSRIs can be taken with or without food, though food may reduce GI side effects. Caffeine — if it's high in tyramine (aged cheese, cured meats, fermented foods), this is mainly a concern with MAOIs, not SSRIs. SSRIs are generally food-flexible.

What symptoms should I watch for if I combine Caffeine and Fluvoxamine?

Severe insomnia, anxiety, palpitations, tremor, restlessness

Are there safer alternatives to combining Caffeine with Fluvoxamine?

Discuss this combination with your prescriber. They may adjust timing, dosing, or switch to an alternative with fewer interaction risks. Never stop an antidepressant abruptly — taper under medical guidance.

What should I tell my doctor about taking Caffeine and Fluvoxamine?

Discuss caffeine elimination when starting fluvoxamine

Explore more interactions

All Caffeine interactions →See every known interaction with CaffeineAll Fluvoxamine interactions →See every known interaction with Fluvoxamine

Or browse the full interaction database (121,000+ pairs).