Is Allopurinol safe during pregnancy?
Pregnancy Teratogenic Effects: Reproductive studies have been performed in rats and rabbits at doses up to twenty times the usual human dose (5 mg/kg per day), and it was concluded that there was no impaired fertility or harm to the fetus due to allopurinol. There is a published report of a study in pregnant mice given 50 or 100 mg/kg allopurinol intraperitoneally on gestation days 10 or 13.
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: Reproductive studies have been performed in rats and rabbits at doses up to twenty times the usual human dose (5 mg/kg per day), and it was concluded that there was no impaired fertility or harm to the fetus due to allopurinol. There is a published report of a study in pregnant mice given 50 or 100 mg/kg allopurinol intraperitoneally on gestation days 10 or 13.
2nd Trimester
Weeks 13–26 · Baby growing
Pregnancy Teratogenic Effects: Reproductive studies have been performed in rats and rabbits at doses up to twenty times the usual human dose (5 mg/kg per day), and it was concluded that there was no impaired fertility or harm to the fetus due to allopurinol. There is a published report of a study in pregnant mice given 50 or 100 mg/kg allopurinol intraperitoneally on gestation days 10 or 13.
3rd Trimester
Weeks 27–40 · Final development
Pregnancy Teratogenic Effects: Reproductive studies have been performed in rats and rabbits at doses up to twenty times the usual human dose (5 mg/kg per day), and it was concluded that there was no impaired fertility or harm to the fetus due to allopurinol. There is a published report of a study in pregnant mice given 50 or 100 mg/kg allopurinol intraperitoneally on gestation days 10 or 13.
Category C — Use Cautiously
Animal studies show adverse effects; weigh benefits vs. risks.
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
Pregnancy specific sawaal? AI se directly pooch lo.
Allopurinol dose, safer alternatives, trimester-specific guidance — apni language mein.