Pristiq vs. Luvox
See how Pristiq and Luvox compare on approved uses, dosing, side effects, and cost.
Key Takeaways
Pristiq is an SNRI approved for major depression, while Luvox is an SSRI approved for OCD and often used off-label for depression.
Pristiq is taken as a single fixed 50 mg dose with no titration, while Luvox requires gradual dose increases and may need twice-daily dosing.
Luvox has a much lower typical monthly list price than Pristiq, though brand-name Luvox has been discontinued and only generic fluvoxamine remains.
Pristiq vs. Luvox Drug Summary
Pristiq
Pristiq (desvenlafaxine) is a serotonin-norepinephrine reuptake inhibitor (SNRI) approved to treat major depressive disorder in adults. It is an extended-release tablet taken once daily, and its standard starting dose of 50 mg is also the usual therapeutic dose, so most patients never need to titrate up.
Luvox
Luvox (fluvoxamine) is a selective serotonin reuptake inhibitor (SSRI) approved for obsessive-compulsive disorder in adults and children ages 8 and up. It is an immediate-release tablet started at a low dose and increased gradually, sometimes split into two daily doses. It is also commonly prescribed off-label for depression, social anxiety, and panic disorder.
Pristiq vs. Luvox Side Effects
Pristiq
Luvox
Pristiq vs. Luvox Dosage
Pristiq
Luvox
| STAGE | DOSE | WHEN |
| Starting dose | 50 mg once daily | At the start |
| Maximum dose | 50 mg once daily | Same as starting |
| Dose changes | None | Fixed dose |
| STAGE | DOSE | WHEN |
| Starting dose | 25 mg once daily | At the start |
| Maximum dose | 50 mg once daily | Days 1-7 |
| Dose changes | 1 increase | As tolerated |
Pristiq
| STAGE | DOSE | WHEN |
| Starting dose | 50 mg once daily | At the start |
| Maximum dose | 50 mg once daily | Same as starting |
| Dose changes | None | Fixed dose |
Luvox
| STAGE | DOSE | WHEN |
| Starting dose | 25 mg once daily | At the start |
| Maximum dose | 50 mg once daily | Days 1-7 |
| Dose changes | 1 increase | As tolerated |
Pristiq vs. Luvox Indications
Pristiq
Pristiq is FDA-approved solely for treating major depressive disorder in adults. It is not approved for children or for other psychiatric conditions such as anxiety or OCD.
Major depressive disorder (MDD) in adults
Not approved for pediatric use
Not approved for OCD or anxiety disorders
Dose adjustment needed in severe renal impairment
Luvox
Luvox is FDA-approved for obsessive-compulsive disorder in both adults and children ages 8 to 17. It is also commonly prescribed off-label for major depression, social anxiety disorder, and panic disorder, though these uses are not FDA-approved.
Obsessive-compulsive disorder (OCD) in adults
Obsessive-compulsive disorder (OCD) in children ages 8-17
Off-label: major depressive disorder
Off-label: social anxiety disorder
Pristiq vs. Luvox Pros and Cons
Pristiq
Pristiq offers a simple, fixed-dose regimen with no titration schedule, which can simplify treatment for adults with depression. As a newer branded SNRI it costs significantly more than generic fluvoxamine, though a generic desvenlafaxine option is now available.
Pros
Single fixed dose (50 mg) with no titration needed
FDA-approved specifically for major depression
Generic desvenlafaxine available for cost savings
May help patients who didn't tolerate Effexor (venlafaxine)
Cons
Roughly $400 to $543 per month before savings programs
Not approved for OCD, anxiety, or panic disorder
No lower-dose option if 50 mg isn't tolerated
Common SNRI effects like hyperhidrosis and dry mouth
Luvox
Luvox is a well-established SSRI with decades of clinical use for OCD, offering flexible dosing that can be adjusted to balance efficacy and tolerability. Because only generic fluvoxamine remains on the market, it is typically far less expensive than Pristiq, though it carries notable drug interaction risks through CYP1A2 inhibition.
Pros
Roughly $15 to $170 per month, only generic available
FDA-approved for OCD in both adults and children 8+
Dosing can be titrated gradually to improve tolerability
Long track record of use since 1994
Cons
Significant CYP1A2 interactions (caffeine, theophylline, clozapine)
Not FDA-approved for depression despite common off-label use
Higher doses often require twice-daily dosing
Higher rates of headache and insomnia than Pristiq
Common Symptoms and Related Diseases You Can Explore
Explore a range of common symptoms the Doctronic Symptom Checker can help you understand.