Is Lactulose Safe in Pregnancy

Status

caution Last reviewed: 2026-05-16 · Confidence: moderate

Reason

Limited pregnancy data; official labeling says use only if clearly needed.

Drug Information

Brand Name
Enulose | Generlac | Kristalose
Generic Name
lactulose
Drug Class
Osmotic laxative
FDA Category
B
Rx Status
prescription

Safe Amount

Dosage must be determined by your provider based on individual risk/benefit.

Effects

Pregnancy
Generally considered a pregnancy option when needed, but use only with prescriber guidance.
Mother
May cause bloating, gas, diarrhea, and possible electrolyte imbalance if used for a long time.
Baby
Animal studies found no fetal harm at usual oral doses. Human pregnancy data are limited.

Trimester Notes

1st Trimester
No specific first-trimester warning in official labeling; limited human data.
2nd Trimester
No specific second-trimester warning in official labeling; use only if needed.
3rd Trimester
No specific trimester warning in official labeling; use only if clearly needed.

Conditions & Warnings

  • Consult OB/GYN or prescriber
  • Prescription medicine: do not stop or continue without provider review
  • Possible dehydration or electrolyte imbalance with diarrhea
  • Diabetes: product contains small amounts of galactose and lactose

Alternatives

  • Polyethylene glycol (provider to confirm pregnancy use)
  • Psyllium or other bulk-forming laxatives if approved by your provider
  • Hydration, fiber, and activity changes if appropriate

References

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