Cymbalta vs Effexor: SNRI antidepressants compared
Cymbalta (duloxetine) and Effexor XR (venlafaxine) are both SNRIs, acting on serotonin and norepinephrine. Duloxetine is also approved for several pain conditions; venlafaxine covers more anxiety disorders but raises blood pressure more and causes stronger withdrawal symptoms if stopped suddenly.
Updated October 4, 2026
At a glance
- Approved for
- Cymbalta
- Depression, generalized anxiety, diabetic nerve pain, fibromyalgia, chronic musculoskeletal pain
- Effexor XR
- Depression, generalized anxiety, social anxiety, panic disorder
- Blood pressure
- Cymbalta
- Can rise slightly
- Effexor XR
- Rises more, especially at higher doses
- Stopping
- Cymbalta
- Taper to avoid withdrawal symptoms
- Effexor XR
- Taper carefully; withdrawal symptoms are often stronger
- Capsules
- Cymbalta
- Swallow whole; do not open
- Effexor XR
- Can be opened and sprinkled on applesauce
- Generic
- Cymbalta
- Yes
- Effexor XR
- Yes
Cymbalta duloxetine | Effexor XR venlafaxine | |
|---|---|---|
| Approved for | Depression, generalized anxiety, diabetic nerve pain, fibromyalgia, chronic musculoskeletal pain | Depression, generalized anxiety, social anxiety, panic disorder |
| Blood pressure | Can rise slightly | Rises more, especially at higher doses |
| Stopping | Taper to avoid withdrawal symptoms | Taper carefully; withdrawal symptoms are often stronger |
| Capsules | Swallow whole; do not open | Can be opened and sprinkled on applesauce |
| Generic | Yes | Yes |
Pain or anxiety
Duloxetine’s approvals for nerve pain from diabetes, fibromyalgia and chronic back or arthritis pain make it a common choice when depression or anxiety comes with chronic pain. Venlafaxine is approved for a wider range of anxiety disorders, including social anxiety and panic disorder, and is sometimes used for hot flashes off-label.
Safety differences
Venlafaxine can raise blood pressure, so it is checked regularly. Duloxetine is avoided in people with significant liver disease or heavy alcohol use, because of a risk of liver injury, and fluvoxamine and ciprofloxacin raise its levels sharply. Both carry the risks of serotonin medicines, including serotonin syndrome with other serotonin-affecting drugs and more bleeding with blood thinners, and both carry a warning about suicidal thoughts in young people.
Stopping
Both can cause discontinuation symptoms, such as dizziness, irritability, nausea and electric-shock sensations, if stopped suddenly. Venlafaxine leaves the body quickly, so its symptoms can be stronger and appear within a day of a missed dose; both are reduced gradually.
Cost
Both are generics. Prices vary with the form and strength, so ask for a quote on the exact capsule prescribed.
Missed doses
Take a missed dose when you remember unless the next one is near, and never double up. Because venlafaxine leaves the body quickly, even one missed dose can bring dizziness or irritability, so keeping to a daily routine matters more than with many antidepressants.
Questions for your prescriber
- Does my pain or anxiety make one a better fit?
- How will my blood pressure or liver be monitored?
- How should we stop it if it does not work for me?
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Sources
Written by the Script Unlock editorial team from the sources above. It is general information, not advice for you or your pet; your prescriber decides which medicine is right.
Script Unlock is a marketplace that lets licensed pharmacies quote a cash price on your prescription. It does not prescribe, dispense or sell medication, does not process patient payments, and does not give medical advice. Always follow the instructions of your prescriber and pharmacist and read the medication guide supplied with your medicine.