Diazepam in Pregnancy — Is It Safe?
Last reviewed: · Source: US FDA drug label database
Avoid diazepam in pregnancy — it is associated with neonatal withdrawal syndrome and respiratory depression in the newborn.
Is it safe to take Diazepam with Pregnancy?
Diazepam crosses the placenta readily and accumulates in fetal tissues due to its long half-life. First-trimester exposure has been associated with a small increased risk of cleft palate in some (but not all) studies. Third-trimester or delivery-time use causes neonatal benzodiazepine withdrawal syndrome (floppy infant syndrome) — hypotonia, respiratory depression, hypothermia, and feeding difficulties. Diazepam should only be used in pregnancy when absolutely necessary and under close medical supervision.
How do Diazepam and Pregnancy interact?
Diazepam readily crosses the placenta (fetal levels may equal or exceed maternal). Its long half-life (20-70 hours) and active metabolites accumulate in the fetal compartment. Neonatal benzodiazepine toxicity at birth: floppy infant syndrome. Neonatal withdrawal: jitteriness, irritability, poor feeding, temperature instability. These can persist for weeks in neonates who lack the metabolic capacity to clear benzodiazepines efficiently.
Data sourced from the US Food and Drug Administration (FDA) drug label database: FDA diazepam drug label — pregnancy warning; OpenFDA drug label data.
Who should be careful?
All pregnant women. Women with severe anxiety or epilepsy may have specific treatment plans — these should be discussed with their neurologist or psychiatrist.
What if I've already taken Diazepam and Pregnancy?
If you have been taking diazepam and discover you are pregnant, do not stop suddenly (withdrawal seizures are a risk). Contact your GP urgently for a planned tapering strategy.
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Frequently Asked Questions
Can I take diazepam when pregnant?
Diazepam should be avoided in pregnancy due to risks of neonatal withdrawal syndrome and floppy infant syndrome. Do not stop suddenly without medical guidance if you are taking it regularly.
What can I take for anxiety in pregnancy?
Psychological therapies (CBT, mindfulness) are the first-line treatment for anxiety in pregnancy. If medication is needed, your perinatal mental health team will advise on the safest options.
What is floppy infant syndrome?
Floppy infant syndrome occurs when benzodiazepines used near delivery cause the newborn to be hypotonic (low muscle tone), lethargic, and have breathing difficulties. It requires neonatal medical care but resolves as the drug is cleared.
Can diazepam cause cleft palate?
Some older studies suggested a link between first-trimester benzodiazepine use and oral clefts, but the absolute risk — even if real — is very small. Newer analyses are less conclusive.