Luvox vs. Fluoxetine

See how Luvox and Fluoxetine compare on approved uses, dosing, side effects, and cost.

Key Takeaways

  • Luvox and fluoxetine are both SSRIs used for OCD, but only fluoxetine is FDA-approved for depression, bulimia, and panic disorder as well.

  • Fluvoxamine strongly inhibits the liver enzyme CYP1A2, raising interaction risk, while fluoxetine's long half-life allows once-weekly dosing but a longer washout if switching drugs.

  • Both carry a boxed warning for suicidal thoughts in children, teens, and young adults, so either one requires close monitoring early in treatment.

Luvox vs. Fluoxetine Drug Summary

Luvox

Luvox (fluvoxamine) is an SSRI antidepressant FDA-approved for obsessive-compulsive disorder in adults and children ages 8 to 17. It's taken orally, usually once or twice a day, with higher doses split into two doses.

Fluoxetine

Fluoxetine is an SSRI approved for depression, OCD, bulimia, panic disorder, and certain bipolar depression combinations. It comes as a capsule, tablet, or liquid, and can be taken once daily or, at maintenance strength, once weekly using its long-acting formulation.

Luvox vs. Fluoxetine Side Effects

Luvox

Most common
nausea (up to 40%)
headache (up to 35%)
insomnia (up to 35%)
somnolence (up to 27%)

Fluoxetine

Most common
nausea (up to 21%)
headache (up to 21%)
insomnia (up to 33%)
somnolence (up to 13%)

Luvox vs. Fluoxetine Dosage

Luvox

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 25 mg once daily At the start
Maximum dose 300 mg/day If needed
Dose changes 4 increases As tolerated

Fluoxetine

Dosage
Dosage Table
STAGE DOSE WHEN
Starting dose 10 mg once daily Week 1
Maximum dose 90 mg once weekly If needed
Dose changes 4 increases Every week

Luvox vs. Fluoxetine Indications

Luvox

Luvox is FDA-approved for obsessive-compulsive disorder in adults and children ages 8 to 17. It's also used off-label for depression, social anxiety disorder, and panic disorder, though these are not FDA-approved uses.

  • Obsessive-compulsive disorder in adults

  • Obsessive-compulsive disorder in children ages 8-17

  • Off-label: major depressive disorder

  • Off-label: social anxiety disorder

  • Off-label: panic disorder

Fluoxetine

Fluoxetine is FDA-approved for major depressive disorder, OCD, bulimia nervosa, panic disorder, and bipolar depression combined with olanzapine. It's also used off-label for PMDD, binge eating disorder, and selective mutism.

  • Major depressive disorder in adults and children 8-18

  • Obsessive-compulsive disorder in adults and children 7-17

  • Bulimia nervosa in adults

  • Panic disorder in adults

  • Off-label: premenstrual dysphoric disorder

Luvox vs. Fluoxetine Pros and Cons

Luvox

Luvox is FDA-approved only for OCD, though clinicians also use it off-label for depression and anxiety disorders. Its strong effect on the liver enzyme CYP1A2 makes drug interactions more likely than with many other SSRIs, so dosing is usually started low and increased slowly. Since brand-name Luvox has been discontinued, only generic fluvoxamine is available.

Pros

  • FDA-approved for OCD in children as young as 8

  • Available as immediate-release tablets or generic extended-release capsules

  • Being studied off-label for anti-inflammatory effects in COVID-19 treatment

Cons

  • Not FDA-approved for depression, unlike fluoxetine

  • Strong CYP1A2 inhibitor, raising interaction risk with caffeine, theophylline, and clozapine

  • Higher labeled rates of nausea, headache, and insomnia in trials

Fluoxetine

Fluoxetine has one of the broadest FDA approval lists among SSRIs, covering depression, OCD, bulimia, panic disorder, and treatment-resistant depression combined with olanzapine. Its long half-life means missed doses matter less day to day, but it also stays in the body for weeks after stopping. As one of the first SSRIs approved in the US, it has decades of generic use behind it.

Pros

  • FDA-approved for depression, OCD, bulimia, panic disorder, and bipolar depression combinations

  • Long-acting metabolite allows a once-weekly maintenance dosing option

  • Available in capsule, tablet, and liquid forms for flexible dosing

Cons

  • Long half-life can complicate switching to MAOIs or other serotonergic drugs, requiring a longer washout

  • Bipolar depression indication requires adding olanzapine, a second medication with its own side effects

  • Not studied for the anti-inflammatory or antiviral uses explored with fluvoxamine

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