desvenlafaxine vs venlafaxine
Side-by-side comparison of desvenlafaxine and venlafaxine Data from FDA drug databases (Orange Book, NDC Directory, recalls, shortages) covering 20,000+ approved drugs, plus CMS pricing; see our methodology.
minor Known Drug Interaction
with a single dose of venlafaxine 50 mg in extensive metabolizers (EM; n = 14) and 25 mg in poor metabolizers (PM; n = 6) of CYP2D6 resulted in higher plasma concentrations of both venlafaxine and O-desvenlafaxine (ODV) in most subjects following administration of ketoconazole.
Recommendation: Your healthcare provider should monitor you for signs of increased side effects since the total amount of medicine in your blood may rise.
Pristiq
Effexor, Effexor XR
Pristiq is a medicine used to treat depression in adults. It belongs to a class of drugs called serotonin-norepinephrine reuptake inhibitors (SNRIs).
Venlafaxine is a medication used to treat depression. It helps to improve your mood by affecting certain chemicals in the brain.
Pristiq is used to treat major depressive disorder (MDD) in adults. MDD can cause you to feel sad, lose interest in activities, and have trouble with daily life. This medicine can help improve your mood and energy levels.
Venlafaxine is used to treat major depressive disorder. This condition can cause a persistent feeling of sadness or loss of interest in daily activities. It may also help maintain improvement in patients with recurrent depression.
Pristiq works by affecting certain chemicals in the brain. It increases the levels of serotonin and norepinephrine. These chemicals help regulate mood and can improve symptoms of depression.
Venlafaxine is a serotonin-norepinephrine reuptake inhibitor (SNRI). It works by increasing the levels of serotonin and norepinephrine in the brain. These chemicals help regulate mood and can be low in people with depression.
- • Feeling sick to your stomach
- • Feeling dizzy
- • Trouble sleeping
- • Increased sweating
- • Constipation
- • Feeling weak or tired
- • Sweating a lot
- • Feeling sick to your stomach
- • Constipation
- • Loss of appetite
- The medicine is not working 278
- Harmful effect from different substances 233
- Using the medicine for a condition it's not approved for 208
- Feeling sick to your stomach 206
- Death by suicide 186
- The medicine is not working 5,510
- Feeling sick to your stomach 4,298
- Harmful effects from different substances 4,264
- Feeling tired 4,199
- Using the medicine for a purpose it's not approved for 4,123
Antidepressants may increase the risk of suicidal thoughts and behaviors in children, adolescents, and young adults. If you are started on Pristiq, your doctor will monitor you closely for worsening depression or suicidal thoughts. Families and caregivers should also watch for these changes.
Antidepressants may increase the risk of suicidal thoughts and behaviors in children, adolescents, and young adults. Your doctor will monitor you closely for worsening depression, suicidal thoughts, or unusual changes in behavior. Venlafaxine is not approved for use in children.
Tell your doctor if you are pregnant or plan to become pregnant. Taking Pristiq late in pregnancy may cause problems in the newborn. There is a pregnancy registry to monitor outcomes in women exposed to antidepressants during pregnancy. You can register by calling 1-844-405-6185.
If you are pregnant or breastfeeding, talk to your doctor before taking venlafaxine. Newborns exposed to SNRIs like venlafaxine in the third trimester may have complications requiring hospitalization. Your doctor will carefully consider the risks and benefits of treatment during pregnancy.
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How to Read This desvenlafaxine vs venlafaxine Comparison
desvenlafaxine is classified in the Serotonin-Norepinephrine Reuptake Inhibitor (SNRI) drug class, while venlafaxine sits within the Serotonin-Norepinephrine Reuptake Inhibitor (SNRI) class. Because both drugs share the same classification, they are often considered interchangeable in theory — but clinical outcomes rarely track that cleanly. Both drugs are prescription-only, so a licensed provider must authorize use.
Adverse event totals above are pulled from the FDA's Adverse Event Reporting System (FAERS). For these top-ranked reactions alone, desvenlafaxine has 1,111 submissions while venlafaxine has 22,394. Those figures reflect cumulative reporting volume — not per-patient risk — so older, widely dispensed drugs typically look worse on count alone. These two drugs have a known minor interaction flagged in FDA labeling, attributed to using these together can cause the levels of both the main drug and its active byproduct to increase in your body.. Serious warnings, pregnancy guidance, and contraindications can differ even when indications overlap.
A table cannot substitute for clinical judgment. Effectiveness, tolerability, drug-drug interactions with your other medications, kidney and liver function, pregnancy status, insurance formulary, and price all feed into a decision that only a licensed prescriber can make responsibly. Data here is sourced from FDA Structured Product Labels (SPL) and FAERS, both of which update as manufacturers and clinicians submit new information. This page is for educational purposes only, is not medical advice, and should not be used to self-switch between desvenlafaxine and venlafaxine — always consult your physician or pharmacist first.
Important: This comparison is for informational purposes only. Drug effects vary between individuals. Always consult your doctor or pharmacist for personalized medical advice.