Can I Take Aspirin During Pregnancy?
Aspirin is widely used for pain and heart health—but is it safe during pregnancy? Let’s explore the research, timing, dosage and doctor advice to help you decide.
What Aspirin Does
Aspirin thins platelets and reduces inflammation. It’s used for pain, fever—and in pregnancy, sometimes to prevent pre‑eclampsia or clotting issues.
First Trimester: Generally Avoided
Low‑dose aspirin (≤ 150 mg/day) in the first trimester has been linked to a slight rise in miscarriage risk. Most guidelines recommend avoiding non‑prescription use during this period.
Second & Third Trimester: Doctor’s Guidance Only
- Low‑dose aspirin: Can reduce risks of pre‑eclampsia or growth restriction in high‑risk pregnancies—with close monitoring.
- Full‑dose aspirin: (≥ 300 mg/day) is not recommended due to bleeding risk for you and baby.
When Doctors May Prescribe It
- History of pre‑eclampsia, gestational hypertension or lupus anticoagulant
- High risk of small-for-gestational-age baby
- Recurrent blood clots or certain thrombophilia conditions
Any use should be under hospital or GP supervision, usually at 75–150 mg/day from 12–16 weeks until 36 weeks.
Potential Benefits
- Reduces pre‑eclampsia risk in women with previous history by up to 60%
- May improve blood flow to the placenta
- Helps in preventing clot-related problems in high-risk cases
Risks & Side Effects
- Increased risk of bleeding—during pregnancy, labour, or caesarean
- Possible effects on fetal cardiovascular ductus arteriosus if used late in pregnancy
- Stomach discomfort or ulcers in the mother
Safe Use Tips
- Only take aspirin if prescribed by a doctor
- Use the lowest effective dose—typically 75–150 mg/day
- Start after the first trimester, as guided
- Attend regular monitoring: blood pressure, platelet count and fetal growth
- Stop aspirin at 36 weeks unless otherwise instructed
Real‑Life Example
Maria was at high risk of pre‑eclampsia due to previous history. Her obstetrician prescribed 100 mg/day from 14 weeks. With careful monitoring, her pregnancy was healthy, and she delivered at term without complications.
FAQs
1. Can I take aspirin for headache during pregnancy?
Not safely—simple pain like headaches is better treated with paracetamol. Aspirin is reserved for medical reasons.
2. Is low‑dose aspirin safe during breastfeeding?
Yes—low doses (≤ 150 mg/day) are typically considered safe while breastfeeding, but check with your doctor.
3. When should I start aspirin if prescribed?
Usually between 12–16 weeks—but always follow your obstetric team's instructions.
4. What if I take aspirin by mistake?
Don’t panic. Contact your midwife or obstetrician—they can advise if you need monitoring or can simply discontinue.
5. Are there alternatives to aspirin?*
Paracetamol can treat pain or fever. Clotting risks require specialist assessment and possibly other medications.
Internal Resources You Might Like
Final Thought
Aspirin during pregnancy is not a DIY medicine—it should only be used if prescribed by your doctor for specific medical reasons. When used correctly, it can help prevent serious problems—when used wrongly, it can harm. Always ask before you take.