Can You Take Aspirin While Pregnant?
Don't take regular-strength aspirin for pain on your own in pregnancy. Low-dose 'baby' aspirin is sometimes prescribed to prevent pre-eclampsia — but only take it if your provider tells you to.
The full answer
Aspirin in pregnancy is really two different stories. Regular full-strength aspirin (for pain or fever) is generally avoided — like other NSAIDs it can affect bleeding and, later in pregnancy, the baby's heart circulation — so acetaminophen (Tylenol/paracetamol) is the preferred choice for pain instead. Low-dose aspirin (often called 'baby aspirin', around 81 mg) is a separate, deliberate medical treatment: providers prescribe it to certain people from around the end of the first trimester to lower the risk of pre-eclampsia, and in that supervised context it's considered appropriate and beneficial. The key distinction is that low-dose aspirin should only be taken because your provider has specifically recommended it for you — not started on your own. This is general information; your provider decides what's right for your pregnancy.
How to take aspirin safely
- For pain or fever, use acetaminophen (Tylenol/paracetamol), not aspirin
- Take low-dose 'baby' aspirin only if your provider has prescribed it for you
- If you're at higher risk of pre-eclampsia, ask your provider whether it's indicated
When to avoid: Avoid regular-strength aspirin for self-treating pain; only use low-dose aspirin under your provider's direction.
Aspirin by trimester
| Stage | What changes |
|---|---|
| First trimester | If low-dose aspirin is indicated for you, this is usually when the conversation happens — guidance generally has it started after 12 weeks, and earlier within that window is typically preferred. It is prescribed based on your risk factors, so it's a decision made with your provider, not one to pre-empt. |
| Second trimester | Where low-dose aspirin has been prescribed, it's normally continued daily through this period. Regular-strength aspirin for pain remains something to avoid — the two uses are genuinely different things that happen to share an ingredient. |
| Third trimester | Prescribed low-dose aspirin is often continued well into the third trimester, with a stopping point your provider sets — commonly discussed in the weeks before delivery. Don't stop or continue on your own reading; the timing is deliberate and individual. |
Common questions about aspirin in pregnancy
What's the difference between baby aspirin and regular aspirin?
Dose, and purpose. Low-dose or 'baby' aspirin is around 81 mg and is used as a preventive treatment when a provider judges it appropriate. Regular-strength aspirin is several times that and is taken for pain or fever — which is the use to avoid in pregnancy. Same drug on the label, two entirely different situations.
Why would a doctor prescribe aspirin in pregnancy?
The main reason is lowering the risk of pre-eclampsia in people assessed as higher risk — because of blood pressure history, a previous affected pregnancy, carrying multiples, or other factors. It's a considered preventive decision based on your history, which is exactly why it isn't something to start independently.
I'm taking low-dose aspirin — can I still take something for a headache?
Acetaminophen is generally the go-to for pain and fever in pregnancy, and being on prescribed low-dose aspirin doesn't change that. What it does mean is that adding any other NSAID is a question for your provider first, since you're already on something affecting bleeding.
Medicines in pregnancy: the basics
A few principles answer most “can I take this?” questions. Your provider or pharmacist comes first — they know your history and can check interactions, so this page is general information, not a prescription. Single-ingredient beats combination — treat one symptom at a time rather than reaching for a multi-symptom cold/flu blend, which often hides a decongestant or alcohol. Timing matters — some medicines are fine later but not in the first trimester, and NSAIDs like ibuprofen are avoided from about 20 weeks. And not treating a real problem — a fever, infection, or severe nausea — carries its own risk, so the goal isn’t to avoid all medicine, it’s to choose the right one (acetaminophen is the usual go-to for pain and fever).
For the full picture, see our pregnancy safety guide, and track your pregnancy with the How Far Along Am I? calculator and the week-by-week guide.
Frequently asked questions
- Can you take aspirin while pregnant?
- Don't take regular-strength aspirin for pain on your own in pregnancy. Low-dose 'baby' aspirin is sometimes prescribed to prevent pre-eclampsia — but only take it if your provider tells you to. Aspirin in pregnancy is really two different stories. Regular full-strength aspirin (for pain or fever) is generally avoided — like other NSAIDs it can affect bleeding and, later in pregnancy, the baby's heart circulation — so acetaminophen (Tylenol/paracetamol) is the preferred choice for pain instead. Low-dose aspirin (often called 'baby aspirin', around 81 mg) is a separate, deliberate medical treatment: providers prescribe it to certain people from around the end of the first trimester to lower the risk of pre-eclampsia, and in that supervised context it's considered appropriate and beneficial. The key distinction is that low-dose aspirin should only be taken because your provider has specifically recommended it for you — not started on your own. This is general information; your provider decides what's right for your pregnancy.
- Why is aspirin something to be careful with in pregnancy?
- Aspirin in pregnancy is really two different stories. Regular full-strength aspirin (for pain or fever) is generally avoided — like other NSAIDs it can affect bleeding and, later in pregnancy, the baby's heart circulation — so acetaminophen (Tylenol/paracetamol) is the preferred choice for pain instead. Low-dose aspirin (often called 'baby aspirin', around 81 mg) is a separate, deliberate medical treatment: providers prescribe it to certain people from around the end of the first trimester to lower the risk of pre-eclampsia, and in that supervised context it's considered appropriate and beneficial. The key distinction is that low-dose aspirin should only be taken because your provider has specifically recommended it for you — not started on your own. This is general information; your provider decides what's right for your pregnancy.
- When should I avoid aspirin during pregnancy?
- Avoid regular-strength aspirin for self-treating pain; only use low-dose aspirin under your provider's direction.