Fluoxetine in Pregnancy — Is It Safe?
Last reviewed: · Source: US FDA drug label database
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Fluoxetine in pregnancy should only be continued or started under medical supervision — untreated depression carries its own risks.
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- Fluoxetine is generally considered second-line to sertraline in pregnancy, partly due to its very long half-life affecting both mother and baby.
- Some studies show a slightly higher signal for cardiac defects compared with other SSRIs, though absolute risk remains low.
- Untreated maternal depression carries its own significant risks, which must be weighed against any medication risk.
- Never stop or switch fluoxetine in pregnancy without discussing it with your doctor first.
Is it safe to take Fluoxetine with Pregnancy?
Fluoxetine is sometimes used in pregnancy but is generally considered second-line to sertraline because of its very long half-life (affecting both mother and baby) and slightly higher signals for cardiac defects in some studies. The decision to use fluoxetine in pregnancy involves weighing the risk of untreated maternal depression (a significant risk to mother and fetal development) against the medication risks. Do not stop without medical advice.
How do Fluoxetine and Pregnancy interact?
Fluoxetine's very long half-life (4-6 days for fluoxetine, 4-16 days for its active metabolite norfluoxetine) means significant fetal exposure. Neonatal adaptation syndrome is expected with third-trimester use. Some studies report a small signal for cardiovascular defects, particularly with first-trimester exposure. Persistent pulmonary hypertension of the newborn (PPHN) risk is similar to other SSRIs.
Data sourced from the US Food and Drug Administration (FDA) drug label database: NICE CG192; OpenFDA fluoxetine drug label.
Interaction severity
Rated moderate: fluoxetine is generally considered second-line to sertraline in pregnancy because of its very long half-life and slightly higher signals for cardiac defects in some studies, but it can still be appropriate when weighed against the risks of untreated maternal depression — this needs individual medical judgment, not a blanket avoid.
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All pregnant women on fluoxetine should be reviewed by their GP and ideally a perinatal mental health team. Sertraline is generally preferred if switching is appropriate.
What if I've already taken Fluoxetine and Pregnancy?
Do not stop suddenly. Contact your GP to discuss. A planned approach to managing depression in pregnancy is far safer than abrupt discontinuation.
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Frequently Asked Questions
Is fluoxetine safe in pregnancy?
It is one of the more studied antidepressants in pregnancy but is generally considered second-line to sertraline. Do not stop without speaking to your doctor.
Can fluoxetine cause miscarriage?
Some studies show a small association with pregnancy loss, but these studies are difficult to separate from the effects of underlying depression. The evidence does not clearly establish causation.
Is Prozac safe to take when pregnant?
Fluoxetine (Prozac) carries similar risks and benefits to other SSRIs in pregnancy. Your perinatal mental health team will help you decide whether continuing is right for you.
Can I switch from fluoxetine to sertraline in pregnancy?
This is possible under medical supervision. Sertraline is often preferred in pregnancy due to more reassuring safety data and shorter half-life. Do not switch without medical guidance.