Compare Effexor vs. Remeron

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

Effexor
(Venlafaxine)

Remeron
(Mirtazapine)

Improves mood and helps you relax. Effexor (Venlafaxine) is good for treating depression and anxiety. May work when other antidepressants haven't, it's but more likely to cause side effects and withdrawal symptoms than other antidepressants.Improves mood. Remeron (Mirtazapine) is okay for treating depression and good for sleep. More likely to cause weight gain than any other antidepressant.
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Reviews & ratings
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5.041304347826087Effexor
Reviews for Effexor (Venlafaxine)
61%
of people (All ages) say Effexor (Venlafaxine) is worth it
50%
say it works well
22%
say it's a big hassle
460 reviews
Have you used Effexor (Venlafaxine)?
Worth itNot sureNot worth it
Reviews for Remeron (Mirtazapine)
47%
14% vs. Effexor (Venlafaxine)
42%
8% vs. Effexor (Venlafaxine)
26%
4% vs. Effexor (Venlafaxine)
127 reviews
Have you used Remeron (Mirtazapine)?
Worth itNot sureNot worth it
Side effects
EffexorRemeron
  • Nausea 42%
  • Drowsiness 22%
  • Dizziness 20%
  • Nervousness 17%
  • Sleep difficulty 16%
  • Loss of appetite 15%
  • Sweating 14%
  • Dry mouth 13%
  • Dry mouth 11%
  • Muscle weakness 10%
More Effexor side effects »
  • Drowsiness 36%
  • Increased appetite 15%
  • Dry mouth 10%
  • Weight gain 10%
  • Constipation 6%
  • Dizziness 4%
  • Muscle weakness 3%
  • Abnormal dreams 3%
  • Flu syndrome 2%
  • Thinking abnormal 2%
More Remeron side effects »
How it works
EffexorRemeron
Effexor (Venlafaxine) is a serotonin and norepinephrine reuptake inhibitor (SNRI) antidepressant. It increases serotonin and norepinephrine activity in the brain, which regulate mood.Remeron (Mirtazapine) is an atypical antidepressant. It stimulates your body to make certain chemicals in the brain, such as serotonin and norepinephrine, which regulate mood.
Type of medication
EffexorRemeron
Antidepressant
Serotonin-norepinephrine reuptake inhibitor (SNRI)
Prescription only
Antidepressant
Noradrenergic and specific serotonergic antidepressant
Prescription only
Available as
EffexorRemeron
  • Pill
  • Extended release
  • Pill
  • Dissolving tablet
Used for (click to learn more)
EffexorRemeron
Risk factors for serious side effects
EffexorRemeron
  • Age 24 years or younger
  • Using other medications that affect serotonin
  • Stopping Effexor (Venlafaxine) suddenly
  • History of high blood pressure
  • Taking other blood-thinning drugs
    • History of bipolar disorder
    • At risk for bipolar disorder
    Detailed Effexor (Venlafaxine) risks & warnings »
    • Age 24 years or younger
    • Using other medications that affect serotonin
    • History of heart problems
    • History of liver problems
    • Higher dose
    • Alcohol
    • Taking other medicines that make you less alert
        Detailed Remeron (Mirtazapine) risks & warnings »
        Pregnancy

        Research studies with animals found harmful effects on unborn babies. It hasn’t been properly studied in humans. The benefits might outweigh the risks even if you’re pregnant. Talk with your doctor.

        Research studies with animals found harmful effects on unborn babies. It hasn’t been properly studied in humans. The benefits might outweigh the risks even if you’re pregnant. Talk with your doctor.

        Sex
        EffexorRemeron
        • Can cause sexual side effects like low libido and an inability to orgasm or ejaculate.
        No sex related info.
        Weight
        EffexorRemeron
        No weight related info.
        • More likely to cause minor weight gain (1 to 5 pounds) and raise cholesterol than any other antidepressant.
        • Can increase appetite and weight.
        • Remeron (Mirtazapine) can increase appetite and cause you to gain weight.
        Upsides and benefits
        EffexorRemeron
        • Effective at relieving depression and anxiety symptoms.
        • Lowers relapse rates of depression.
        • Causes more sleepiness than other antidepressants, so it's good for people who have trouble sleeping.
        • Might work when other antidepressants haven't worked since it affects two chemicals in the brain that impact your mood. Many other antidepressants affect only serotonin, but not norepinephrine too.
        • Six out of ten people who use an antidepressant for the first time find that it works for them.
        • Effective at relieving some depression symptoms.
        • Starts to work more quickly than most antidepressants.
        • Might be a good option for people who have insomnia with their depression, because it can make you very sleepy.
        • Good option for people who are underweight or frail, because it can help you gain weight.
        • Six out of ten people who use an antidepressant for the first time find that it works for them.
        Downsides and risks
        EffexorRemeron
        • Can cause sexual side effects like low libido and an inability to orgasm or ejaculate.
        • Not the best option for people with high blood pressure.
        • Overdosing on this medication could be fatal.
        • It's more likely to cause nausea and vomiting or make you feel sick if you miss a dose than other antidepressants. Also causes more sleepiness than others.
        • Like most antidepressants, it can cause a higher risk of suicidal thoughts and behavior for people younger than 24.
        • The first antidepressant you try doesn't always work or it can cause side effects you really don't like. You might need to try a few different medications until you find one that works for you.
        • Not as effective as other medications for depression.
        • More sedating than other antidepressants.
        • More likely to cause minor weight gain (1 to 5 pounds) and raise cholesterol than any other antidepressant.
        • Like most antidepressants, can cause higher risk of suicidal thoughts and behavior for people age 24 and younger.
        • The first antidepressant you try doesn't always work or it can cause side effects you really don't like. You might need to try a few different medications until you find one that works for you.
        Tips from our pharmacists for people taking the medication
        EffexorRemeron
        • Takes about 8 to 12 weeks to see the medication's full effects on your mood.
        • You can take the extended-release form once a day with food either in the morning or in the evening at about the same time each day.
        • Extended-release capsules should be swallowed whole. If you can’t swallow pills, open the capsule, sprinkle it on a spoonful of applesauce and then swallow it without chewing.
        • Stop taking it slowly to avoid getting withdrawal symptoms.
        • Tell your doctor if you notice sudden mood changes or unusual thoughts.
        • Makes you sleepy. Take at bedtime.
        • Can increase appetite and weight.
        • Takes 8 to 12 weeks to see full effects on mood.
        • Stop taking slowly to avoid withdrawal symptoms.
        • Tell your doctor if you notice sudden mood changes or unusual thoughts.
        Learn more
        More about EffexorSide effectsReviews & ratingsAlternativesFDA package insert
        Have you used Effexor (Venlafaxine)?
        Worth itNot sureNot worth it
        More about RemeronSide effectsReviews & ratingsAlternativesFDA package insert
        Have you used Remeron (Mirtazapine)?
        Worth itNot sureNot worth it