Paxil vs. Pristiq
See how Paxil and Pristiq compare on approved uses, dosing, side effects, and cost.
Key Takeaways
Paxil treats six conditions including OCD, panic disorder, and social anxiety disorder, while Pristiq is FDA-approved only for major depressive disorder in adults.
Pristiq uses one fixed 50 mg dose with no titration, while Paxil comes in four dose strengths that may need adjusting over time.
Paxil costs less per month on average, but its strong CYP2D6 drug interactions and short half-life mean more monitoring than Pristiq typically requires.
Paxil vs. Pristiq Drug Summary
Paxil
Paxil (paroxetine) is a selective serotonin reuptake inhibitor (SSRI) approved for major depressive disorder, OCD, panic disorder, social anxiety disorder, generalized anxiety disorder, and PTSD. It's taken as a once-daily oral tablet, with doses typically ranging from 20 mg to 50 mg depending on the condition being treated.
Pristiq
Pristiq (desvenlafaxine) is a serotonin-norepinephrine reuptake inhibitor (SNRI) approved for major depressive disorder in adults. It's taken as a once-daily extended-release tablet at a fixed 50 mg dose, which serves as both the starting and maintenance dose.
Paxil vs. Pristiq Side Effects
Paxil
Pristiq
Paxil vs. Pristiq Dosage
Paxil
Pristiq
| STAGE | DOSE | WHEN |
| Starting dose | 20 mg once daily | At the start |
| Maximum dose | 50 mg once daily | If needed |
| Dose changes | 3 increases | As tolerated |
| 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 |
Paxil
| STAGE | DOSE | WHEN |
| Starting dose | 20 mg once daily | At the start |
| Maximum dose | 50 mg once daily | If needed |
| Dose changes | 3 increases | 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 |
Paxil vs. Pristiq Indications
Paxil
Paxil is FDA-approved for six conditions, including major depressive disorder, OCD, panic disorder, and social anxiety disorder, making it one of the more versatile SSRIs. It's not approved for use in pediatric patients.
Major depressive disorder
Obsessive-compulsive disorder
Panic disorder
Social anxiety disorder
Pristiq
Pristiq is FDA-approved only for major depressive disorder in adults, with no additional approved uses for anxiety disorders. It's sometimes prescribed off-label for menopausal hot flashes, though this isn't an FDA-approved use.
Major depressive disorder in adults
Not approved for pediatric patients
Sometimes used off-label for menopausal hot flashes
Sometimes used off-label for diabetic nerve pain
Paxil vs. Pristiq Pros and Cons
Paxil
Paxil covers more FDA-approved indications than Pristiq, making it useful for patients with co-occurring anxiety and depressive disorders. As a strong CYP2D6 inhibitor with a short half-life, it carries more interaction and discontinuation concerns than newer options.
Pros
Approved for six different conditions, including OCD, panic disorder, and social anxiety disorder
Available in immediate-release, extended-release, and liquid forms
Decades of clinical use and safety data since its 1992 approval
Lower monthly list price than Pristiq (roughly $300 to $310 vs $400 to $543)
Cons
Strong CYP2D6 inhibitor, causing many drug interactions
Short half-life often leads to more noticeable withdrawal symptoms
Multiple dose strengths mean more titration decisions over time
Slightly higher risk of sedation-related side effects than Pristiq
Pristiq
Pristiq's fixed 50 mg dose keeps things simple, since it doubles as both the starting and therapeutic dose with no titration schedule. It's approved only for major depressive disorder, so patients with anxiety disorders need a different medication, and it costs noticeably more per month than Paxil.
Pros
Single 50 mg dose works as both starting and maintenance dose, no titration needed
Fewer drug interaction concerns since it isn't a strong CYP2D6 inhibitor
Simple once-daily extended-release tablet with minimal dosing complexity
Active metabolite of venlafaxine, useful for patients who tolerated Effexor well
Cons
Higher rate of nausea (up to 41%) than Paxil
Only approved for major depressive disorder, not anxiety disorders like Paxil
Costs substantially more per month than Paxil, even with generic desvenlafaxine (roughly $400 to $543 vs $300 to $310)
Higher risk of sweating (hyperhidrosis) as a side effect
Common Symptoms and Related Diseases You Can Explore
Explore a range of common symptoms the Doctronic Symptom Checker can help you understand.