Compare Celexa vs. Prozac

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

Celexa
(Citalopram)

Prozac
(Fluoxetine)

Improves mood and helps you relax. Celexa (Citalopram) is good for treating depression and anxiety. Might be less likely to cause side effects than some antidepressants, but not the best choice for people with heart or liver problems.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.
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Reviews & ratings
Button Group. All currently active
Button Group. All currently active
4.954148471615721Celexa
Reviews for Celexa (Citalopram)
60%
of people say Celexa (Citalopram) is worth it
50%
say it works well
15%
say it's a big hassle
Reviews for Prozac (Fluoxetine)
61%
+1% vs. Celexa (Citalopram)
40%
10% vs. Celexa (Citalopram)
16%
1% vs. Celexa (Citalopram)
Side effects
CelexaProzac
  • Drowsiness 8%
  • Nausea 7%
  • Dry mouth 6%
  • Abnormal ejaculation 5%
  • Ejaculation disorder 5%
  • Diarrhea 3%
  • Tremor 2%
  • Sweating increased 2%
  • Fatigue 2%
  • Loss of appetite 2%
More Celexa side effects »
  • Rash 57%
  • Sleep difficulty 20%
  • Nausea 18%
  • Muscle weakness 12%
  • Drowsiness 10%
  • Tremor 9%
  • Dry mouth 9%
  • Lower sex drive 9%
  • Loss of appetite 7%
  • Anxiety 7%
More Prozac side effects »
How it works
CelexaProzac
Celexa (Citalopram) is a selective serotonin reuptake inhibitor (SSRI) antidepressant. It increases serotonin activity in the brain, which regulates mood.Prozac (Fluoxetine) is a selective serotonin reuptake inhibitor (SSRI) antidepressant. It increases serotonin activity in the brain, which regulates mood.
Type of medication
CelexaProzac
Antidepressant
Selective serotonin reuptake inhibitor (SSRI)
Prescription only
Antidepressant
Selective serotonin reuptake inhibitor (SSRI)
Prescription only
Available as
CelexaProzac
  • Pill
  • Oral solution
  • Pill
  • Delayed release capsule
  • Liquid
Used for (click to learn more)
CelexaProzac
How well it works for depression
The free Iodine Start program helps people track how well they are improving, and find the right antidepressant faster.

After 4 weeks using Start and Celexa (Citalopram), here’s how much better people feel.

After 4 weeks using Start and Prozac (Fluoxetine), here’s how much better people feel.

Risk factors for serious side effects
CelexaProzac
  • Age 24 years or younger
  • Using other medications that affect serotonin
  • History of bipolar disorder
  • At risk for bipolar disorder
  • Stopping Celexa (Citalopram) suddenly
  • Higher dose
  • History of heart problems
  • History of liver problems
  • Older age
  • Taking other blood-thinning drugs
    Detailed Celexa (Citalopram) risks & warnings »
    • Age 24 years or younger
    • Using other medications that affect serotonin
    • Stopping Prozac (Fluoxetine) suddenly
    • History of heart problems
    • History of liver problems
    • Drug interactions
    • Taking other blood-thinning drugs
      • History of bipolar disorder
      • At risk for bipolar disorder
      Detailed Prozac (Fluoxetine) risks & warnings »
      Pregnancy category
      CelexaProzac
      CFDA pregnancy category (Weigh risks vs. benefits)

      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.

      See the FDA package insert
      CFDA pregnancy category (Weigh risks vs. benefits)

      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.

      See the FDA package insert
      Alcohol
      No specific alcohol-related info.No specific alcohol-related info.
      Food
      • Take with food to avoid upset stomach.
      • Take in the morning with food to avoid side effects.
      Kidneys and liver
      No specific kidneys and liver-related info.No specific kidneys and liver-related info.
      Sex
      • Can cause sexual side effects like low libido and an inability to orgasm or ejaculate.
      • Celexa (Citalopram) can cause lower sex drive or difficulty having an orgasm. If the problem persists after the first 2 to 3 months, you can talk to your doctor about alternative antidepressants or performance-enhancing medications.
      • Can cause sexual side effects like low libido and an inability to orgasm or ejaculate.
      • Prozac (Fluoxetine) can cause lower sex drive or difficulty having an orgasm. If the problem persists after the first 2 to 3 months, you can talk to your doctor about alternative antidepressants or performance-enhancing medications.
      Sleep
      • Stopping Celexa (Citalopram) suddenly may cause withdrawal symptoms such as nausea, anxiety, agitation, flu-like symptoms, trouble sleeping, and dizziness. Withdrawal symptoms usually occur within 3 days of stopping the medication, and go away within 1 to 2 weeks. Work with your doctor to gradually reduce your dose.
      • Stopping Prozac (Fluoxetine) suddenly may cause withdrawal symptoms such as nausea, anxiety, agitation, flu-like symptoms, trouble sleeping, and dizziness. Withdrawal symptoms usually occur within 3 days of stopping the medication, and go away within 1 to 2 weeks. Work with your doctor to gradually reduce your dose.
      Weight
      • Can cause minor weight gain (1 to 5 pounds).
      No specific weight-related info.
      Upsides and benefits
      CelexaProzac
      • Causes less sleepiness compared to other antidepressants.
      • Effective at relieving depression and anxiety symptoms.
      • Six out of ten people who use an antidepressant for the first time find that it works for them.
      • 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.
      • Effective at relieving depression and anxiety symptoms.
      • Six out of ten people who use an antidepressant for the first time find that it works for them.
      Downsides and risks
      CelexaProzac
      • Can cause minor weight gain (1 to 5 pounds).
      • Celexa (Citalopram) can cause an irregular heartbeat if you take a high dose (40 mg a day, or more).
      • Not a good option for you if you have heart or liver problems.
      • Like most antidepressants, it can cause a higher risk of suicidal thoughts and behavior for people younger than 24 years.
      • Can cause sexual side effects like low libido and an inability to orgasm or ejaculate.
      • 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 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.
      • Can cause sexual side effects like low libido and an inability to orgasm or ejaculate.
      • 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
      CelexaProzac
      • Take with food to avoid upset stomach.
      • 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.
      • 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.
      Learn more
      More about CelexaSide effectsReviews & ratingsAlternativesFDA package insert
      More about ProzacSide effectsReviews & ratingsAlternativesFDA package insert