Compare Prozac vs. Remeron

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

Prozac
(fluoxetine)

Remeron
(mirtazapine)

Improves mood and helps you relax. Prozac (Fluoxetine) is good for treating depression and anxiety. It's more energizing than other antidepressants, but may not be the best choice for people who have trouble sleeping.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
4.74Prozac
Reviews for Prozac
62%
of people (All ages) say Prozac is worth it
40%
say it works well
16%
say it's a big hassle
1319 reviews
Have you used Prozac (fluoxetine)?
Worth itNot sureNot worth it
Reviews for Remeron
45%
+17% better vs. Prozac
39%
+1% better vs. Prozac
26%
+10% better vs. Prozac
152 reviews
Have you used Remeron (mirtazapine)?
Worth itNot sureNot worth it
Side effects
ProzacRemeron
  • Nausea 13%
  • Headache 2%
  • Insomnia 18%
  • Nervousness 5%
  • Somnolence 7%
  • Anxiety 6%
  • Diarrhea 4%
  • Asthenia 5%
  • Anorexia 7%
  • Dizziness 3%
More Prozac side effects »
  • Sleepiness 36%
  • Dry mouth 10%
  • Increased appetite   15%
  • Increased appetite 15%
  • Constipation 6%
  • Weight gain 10%
  • Lack of energy 3%
  • Dizziness 4%
  • Flu syndrome 2%
  • Abnormal dreams 3%
More Remeron side effects »
How it works
ProzacRemeron
Prozac (Fluoxetine) is a selective serotonin reuptake inhibitor (SSRI) antidepressant. It increases serotonin activity in the brain, which regulates 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
ProzacRemeron
Prescription onlyPrescription only
Available as
ProzacRemeron
  • Pill
  • Delayed release capsule
  • Liquid
  • Pill
  • Dissolving tablet
Used for
ProzacRemeron
Risk factors for serious side effects
ProzacRemeron
  • Age 24 years or younger
  • Using other medications that affect serotonin
  • Stopping Prozac (Fluoxetine) suddenly
  • History of heart problems
  • History of liver problems
Detailed Prozac (fluoxetine) 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
ProzacRemeron
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.
Food
ProzacRemeron
  • Take in the morning with food to avoid side effects.
No food related info.
Sex
ProzacRemeron
  • Can cause sexual side effects like low libido and an inability to orgasm or ejaculate.
No sex related info.
Sleep
ProzacRemeron
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
ProzacRemeron
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
ProzacRemeron
  • Effective at relieving depression and anxiety symptoms.
  • Lowers relapse rates of depression and bulimia nervosa.
  • Causes less sleepiness than other antidepressants.
  • It's more energizing than other antidepressants, so it's good for people who have low energy.
  • It has been used to treat depression for a long time, so there's a lot of information available about how it works and how safe it is.
  • 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.
  • 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
ProzacRemeron
  • Can cause sexual side effects like low libido and an inability to orgasm or ejaculate.
  • Can increase feelings of anxiety or cause headaches during the first few weeks of taking it. These effects should go away over time.
  • More likely than other antidepressants to interact with other medications you're taking.
  • 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
ProzacRemeron
  • Take in the morning with food to avoid side effects.
  • Takes about 8 to 12 weeks to see the medication's full effects on your mood.
  • 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 ProzacSide effectsReviews & ratingsAlternativesFDA package insert
Have you used Prozac (fluoxetine)?
Worth itNot sureNot worth it
More about RemeronSide effectsReviews & ratingsAlternativesFDA package insert
Have you used Remeron (mirtazapine)?
Worth itNot sureNot worth it