Compare Remeron vs. Effexor

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

Remeron
(mirtazapine)

Effexor
(venlafaxine)

Improves mood. Remeron (Mirtazapine) is okay for treating depression and good for sleep. More likely to cause weight gain than any other antidepressant.Improves mood and helps you relax. Effexor (Venlafaxine) is good for treating depression and anxiety. It may work when other antidepressants haven't, but it's more likely to cause side effects and withdrawal symptoms than other antidepressants.
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Coupons for Remeron
Best available price for 30 (15mg) tablets of mirtazapine
Coupons for Effexor
Best available price for 60 (75mg) tablets of venlafaxine
Reviews & ratings
Filter group. All currently selected
Filter group. All currently selected
4.46Remeron
Reviews for Remeron
45%
of people (All ages) say Remeron is worth it
39%
say it works well
26%
say it's a big hassle
152 reviews
Have you used Remeron (mirtazapine)?
Worth itNot sureNot worth it
Reviews for Effexor
62%
-17% worse vs. Remeron
51%
-12% worse vs. Remeron
23%
-3% worse vs. Remeron
577 reviews
Have you used Effexor (venlafaxine)?
Worth itNot sureNot worth it
Side effects
RemeronEffexor
  • Drowsiness 36%
  • Dry mouth 10%
  • Increased appetite 15%
  • Constipation 6%
  • Weight gain 10%
  • Muscle weakness 3%
  • Dizziness 4%
  • Flu syndrome 2%
  • Abnormal dreams 3%
  • Thinking abnormal 2%
More Remeron side effects »
  • Nausea 26%
  • Headache 1%
  • Drowsiness 14%
  • Dry mouth 11%
  • Dizziness 11%
  • Sleep difficulty 8%
  • Abnormal ejaculation 16%
  • Constipation 8%
  • Nervousness 17%
  • Muscle weakness 14%
More Effexor side effects »
How it works
RemeronEffexor
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.Effexor (Venlafaxine) is a serotonin and norepinephrine reuptake inhibitor (SNRI) antidepressant. It increases serotonin and norepinephrine activity in the brain, which regulate mood.
Type of medication
RemeronEffexor
Prescription onlyPrescription only
Available as
RemeronEffexor
  • Pill
  • Dissolving tablet
  • Pill
  • Extended release
Used for
RemeronEffexor
Risk factors for serious side effects
RemeronEffexor
  • Age 24 years or younger
  • Using other medications that affect serotonin
  • History of heart problems
  • History of liver problems
  • Higher dose
Detailed Remeron (mirtazapine) risks & warnings »
  • 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
Detailed Effexor (venlafaxine) 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
RemeronEffexor
No sex related info.
  • Can cause sexual side effects like low libido and an inability to orgasm or ejaculate.
Weight
RemeronEffexor
  • Remeron (Mirtazapine) can increase appetite and cause you to gain weight.
  • Can increase appetite and weight.
  • More likely to cause minor weight gain (1 to 5 pounds) and raise cholesterol than any other antidepressant.
No weight related info.
Upsides and benefits
RemeronEffexor
  • 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.
  • 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.
  • Six out of ten people who use an antidepressant for the first time find that it works for them.
  • 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.
Downsides and risks
RemeronEffexor
  • 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.
  • 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.
Tips from our pharmacists for people taking the medication
RemeronEffexor
  • 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.
  • 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.
Learn more
More about RemeronSide effectsReviews & ratingsAlternativesFDA package insert
Have you used Remeron (mirtazapine)?
Worth itNot sureNot worth it
More about EffexorSide effectsReviews & ratingsAlternativesFDA package insert
Have you used Effexor (venlafaxine)?
Worth itNot sureNot worth it