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. It may work when other antidepressants haven't, but it's more likely to cause side effects and withdrawal symptoms than other antidepressants.Improves mood. Remeron (mirtazapine) improves your mood and helps you sleep better, but can cause more weight gain than any other antidepressant.
Reviews & ratings
Filter group. All currently selected
Filter group. All currently selected
5.07Effexor
Reviews for Effexor
62%
of people (All ages) say Effexor is worth it
51%
say it works well
23%
say it's a big hassle
577 reviews
Have you used Effexor (venlafaxine)?
Worth itNot sureNot worth it
Reviews for Remeron
45%
+17% better vs. Effexor
39%
+12% better vs. Effexor
26%
+3% better vs. Effexor
152 reviews
Have you used Remeron (mirtazapine)?
Worth itNot sureNot worth it
Side effects
EffexorRemeron
  • 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 »
  • Sleepiness 36%
  • Dry mouth 10%
  • Increased appetite 15%
  • Constipation 6%
  • Weight gain 10%
  • Lack of energy 3%
  • Dizziness 4%
  • Flu syndrome 2%
  • Abnormal dreams 3%
  • Abnormal thinking 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
Prescription onlyPrescription only
Available as
EffexorRemeron
  • Pill
  • Extended release
  • Pill
  • Dissolving tablet
Used for
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
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
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.

Interactions
EffexorRemeron
No interactions related info.
  • Prescription medications can interact with Remeron (mirtazapine). Let your doctor or pharmacist know if you're on prescription medications currently or within the past 14 days.
Sex
EffexorRemeron
  • Can cause sexual side effects like low libido and an inability to orgasm or ejaculate.
No sex related info.
Sleep
EffexorRemeron
No sleep related info.
  • Remeron (mirtazapine) can make you sleepy. It is best to take at bedtime.
  • Can help you fall asleep if you have trouble sleeping.
  • Makes you more tired than other antidepressants.
Weight
EffexorRemeron
No weight related info.
  • Remeron (mirtazapine) can raise your appetite and cause you to gain weight. Remeron (mirtazapine) can also raise your cholesterol.
  • Remeron (mirtazapine) can increase your appetite and cause to you to gain weight.
  • Good option if you are underweight or frail, because it can help you gain weight.
  • More likely to cause minor weight gain (1-5 pounds) and raise cholesterol than any other antidepressant.
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.
  • 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.
  • 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.
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.
  • Makes you more tired than other antidepressants.
  • More likely to cause minor weight gain (1-5 pounds) and raise cholesterol than any other antidepressant.
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.
  • Remeron (mirtazapine) can make you sleepy. It is best to take at bedtime.
  • Remeron (mirtazapine) can increase your appetite and cause to you to gain weight.
  • You should not abruptly stop Remeron (mirtazapine) as this could cause serious side effects.
  • Prescription medications can interact with Remeron (mirtazapine). Let your doctor or pharmacist know if you're on prescription medications currently or within the past 14 days.
  • Remeron (mirtazapine) should be protected from light. Keep it in it's original package until ready to use.
  • Remeron (mirtazapine) can cause dry mouth. Try using sugar-free gum or candy to help with dry mouth.
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