Is Loperamide safe during pregnancy?
Pregnancy Teratogenic Effects. Teratology studies have been performed in rats using oral loperamide hydrochloride doses of 2.5 mg/kg/day, 10 mg/kg/day, and 40 mg/kg/day, and in rabbits using oral doses of 5 mg/kg/day, 20 mg/kg/day, and 40 mg/kg/day. These studies have revealed no evidence of impaired fertility or harm to the fetus at doses up to 10 mg/kg/day in rats (5 times the human dose based on body surface area comparison) and 40 mg/kg/day in rabbits (43 times the human dose based on body s...
Overall verdict
Use With Caution
Trimester-by-Trimester Guide
40 weeks · 3 stages · different risks
1st Trimester
Weeks 1–12 · Organs forming
Pregnancy Teratogenic Effects. Teratology studies have been performed in rats using oral loperamide hydrochloride doses of 2.5 mg/kg/day, 10 mg/kg/day, and 40 mg/kg/day, and in rabbits using oral doses of 5 mg/kg/day, 20 mg/kg/day, and 40 mg/kg/day. These studies have revealed no evidence of impaired fertility or harm to the fetus at doses up to 10 mg/kg/day in rats (5 times the human dose based on body surface area comparison) and 40 mg/kg/day in rabbits (43 times the human dose based on body s...
2nd Trimester
Weeks 13–26 · Baby growing
Pregnancy Teratogenic Effects. Teratology studies have been performed in rats using oral loperamide hydrochloride doses of 2.5 mg/kg/day, 10 mg/kg/day, and 40 mg/kg/day, and in rabbits using oral doses of 5 mg/kg/day, 20 mg/kg/day, and 40 mg/kg/day. These studies have revealed no evidence of impaired fertility or harm to the fetus at doses up to 10 mg/kg/day in rats (5 times the human dose based on body surface area comparison) and 40 mg/kg/day in rabbits (43 times the human dose based on body s...
3rd Trimester
Weeks 27–40 · Final development
Pregnancy Teratogenic Effects. Teratology studies have been performed in rats using oral loperamide hydrochloride doses of 2.5 mg/kg/day, 10 mg/kg/day, and 40 mg/kg/day, and in rabbits using oral doses of 5 mg/kg/day, 20 mg/kg/day, and 40 mg/kg/day. These studies have revealed no evidence of impaired fertility or harm to the fetus at doses up to 10 mg/kg/day in rats (5 times the human dose based on body surface area comparison) and 40 mg/kg/day in rabbits (43 times the human dose based on body s...
Category B — Likely Safe
Animal studies show no risk, but limited human data available.
Not medical advice
Every pregnancy is different. Always consult your obstetrician before taking any medicine. Drug safety classifications can change — verify current guidelines with your doctor. For emergencies, call 112.
Frequently Asked Questions
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