Compare Remeron vs. Effexor

Head-to-head comparisons of medication uses, side effects, ratings, and more.

Remeron (mirtazapine)

Prescription only

Effexor (venlafaxine)

Prescription only
Improves mood.

Remeron (mirtazapine) improves your mood and helps you sleep better, but can cause more weight gain than any other antidepressant.

4.5/ 7 average rating with 152 reviewsforRemeron
Improves mood and helps you relax.

Effexor (venlafaxine) is good for treating depression and anxiety, but it can cause more withdrawal symptoms if you stop suddenly compared to other antidepressants.

5.1/ 7 average rating with 577 reviewsforEffexor
Upsides
  • Effective at relieving some depression symptoms.
  • Starts to work more quickly than most antidepressants.
  • Can help you fall asleep if you have trouble sleeping.
  • Can also help relieve anxiety.
  • Good option if you are underweight or frail, because it can help you gain weight.
  • Available as a generic.
  • Effexor (venlafaxine) effectively treats depression, anxiety, and panic disorder.
  • Effexor (venlafaxine) causes more sleepiness than other antidepressants, so it's beneficial for people who have trouble sleeping.
  • Effexor (venlafaxine) might work when other antidepressants haven't worked since it affects two chemicals in the brain that impact your mood.
  • Effexor (venlafaxine) has several uses, which may be good for people with multiple conditions.
  • Effexor (venlafaxine) is available in generic, which is cheaper.
Downsides
  • Makes you more tired than other antidepressants.
  • More likely to cause minor weight gain (1-5 pounds) and raise cholesterol than any other antidepressant.
  • Effexor (venlafaxine) can cause side effects such as decreased libido and increased blood pressure.
  • Like most antidepressants, it can cause a higher risk of suicidal thoughts and behavior for people aged 24 years or younger.
  • Compared to other antidepressants, it's more likely to cause unpleasant withdrawal symptoms if you suddenly stop taking it and can causes more sleepiness.
Used for
Dosage forms
  • Pill
  • Dissolving tablet
  • Pill
  • Extended release
Price
Lowest price near you
$10
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Lowest price near you
$16.2
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Reviews
152 
45%
think this treatment is worth it
39%
think this treatment works well
26%
think this treatment is a hassle

Have you used Remeron (mirtazapine)?

Leave a review
577 
62%
think this treatment is worth it
51%
think this treatment works well
23%
think this treatment is a hassle

Have you used Effexor (venlafaxine)?

Leave a review
Side effects
The Remeron (mirtazapine) FDA package insert doesn’t have numbers about how common side effects are.
10possible side effects
  • Nausea
    37%
  • Headache
    25%
  • Drowsiness
    23%
  • Dry mouth
    22%
  • Dizziness
    19%
  • Difficulty sleeping
    18%
  • Constipation
    15%
  • Nervousness
    13%
  • Weakness
    12%
  • Sweating
    12%
See more detailed side effects
Risks and warnings
  • Suicidal thoughts or behavior

    Age 24 years or younger

  • Serotonin syndrome

    Using other medications that affect serotonin

  • Heart problems

    History of heart problems

    ...and 2 more risk factors

  • Driving impairment

    Alcohol

    ...and 1 more risk factors

See more detailed risks and warnings
  • Suicidal thoughts or behavior

    Age 24 years or younger

  • Serotonin syndrome

    Taking tricyclic antidepressants, lithium, tramadol, fentanyl, amphetamines, certain headache medications (triptans), St. John's Wort

  • Withdrawal

    Stopping Effexor (venlafaxine) suddenly

  • Increased bleeding

    Taking other blood-thinning drugs (including aspirin, NSAIDs such as Advil, warfarin)

  • Increased blood pressure

  • Bipolar disorder

    History of bipolar disorder

    ...and 1 more risk factors

See more detailed risks and warnings