Aspirin
Low-dose aspirin (usually 75 mg daily) may be prescribed in the UK to reduce clot risk in some people who have had a heart attack, stroke, or certain circulatory conditions — only when a prescriber recommends it.
This medicine is part of the Blood pressure, cholesterol & related category.
Generic name: aspirin
Quick answers
Short replies to searches people often run before speaking to a clinician. For the overview of what the medicine is used for, see the short summary under the page title above.
What is it for?
Low-dose aspirin (usually 75 mg daily) may be prescribed in the UK to reduce clot risk in some people who have had a heart attack, stroke, or certain circulatory conditions — only when a prescriber re…
How long does it take to work?
Onset varies by condition and dose. Your GP or pharmacist can explain what to expect and when to review.
What are common side effects?
Indigestion, nausea, or increased bruising or nosebleeds are relatively common at low dose.
Can you take paracetamol or ibuprofen with it?
Major bleeding risk with warfarin, DOACs, clopidogrel, and NSAIDs.
More about what Aspirin is used for
Low-dose aspirin (usually 75 mg daily) may be prescribed in the UK to reduce clot risk in some people who have had a heart attack, stroke, or certain circulatory conditions — only when a prescriber recommends it.
Higher doses are sometimes used for pain or fever, but Paracetamol or Ibuprofen are often preferred for everyday aches because of aspirin side effects.
How does Aspirin work, and how long does it take to work?
Aspirin reduces platelet stickiness, which lowers the chance of clots forming in arteries when used long term at low dose.
It also reduces pain and fever at higher anti-inflammatory doses.
How and when should you take Aspirin?
Swallow tablets with water, usually with or after food if it upsets your stomach. Low-dose is often taken once daily in the morning — follow your own label.
Do not take aspirin for children under 16 unless a specialist advises — Reye’s syndrome risk.
What are the common side effects of Aspirin?
Indigestion, nausea, or increased bruising or nosebleeds are relatively common at low dose.
Tinnitus can occur with higher doses.
Serious side effects of Aspirin — when to get urgent help
Seek urgent help for vomiting blood, black stools, severe allergic reaction, or sudden severe asthma worsening if you have aspirin-sensitive asthma.
Bleeding risk rises with anticoagulants, SSRIs, and NSAIDs — always check before combinations.
What if you miss a dose of Aspirin?
If you miss a low-dose tablet, take it when you remember unless your next dose is due soon. Do not double up.
Who should not take Aspirin?
Active bleeding, some ulcers, severe liver problems, and children under 16 (usual rule) are examples where aspirin may be avoided. Pregnancy needs individual advice.
Can you take paracetamol or ibuprofen with Aspirin? — other interactions
Major bleeding risk with Warfarin, DOACs, Clopidogrel, and NSAIDs. Ibuprofen may reduce aspirin’s protective platelet effect if taken regularly — ask your pharmacist.
Aspirin in pregnancy and breastfeeding
Avoid in pregnancy unless specifically prescribed; discuss breastfeeding with your GP.
Blood tests and monitoring on Aspirin
If you take aspirin with blood thinners or have bleeding symptoms, your prescriber may review need and dose.
What might your GP prescribe instead of Aspirin?
Clopidogrel or other antiplatelet strategies may be used instead in some conditions — cardiology or stroke team decides.
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Reviewed by UK registered pharmacists for accuracy and clarity. Content is informational only.
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Frequently asked questions about Aspirin
People also ask — common Google searches
- What is Aspirin used for?
- Low-dose aspirin (usually 75 mg daily) may be prescribed in the UK to reduce clot risk in some people who have had a heart attack, stroke, or certain circulatory conditions — only when a prescriber recommends it.
- How long does Aspirin take to work?
- Onset varies by condition and dose. Your GP or pharmacist can explain what to expect and when to review. Always follow your prescriber’s follow-up plan.
- Can you take Aspirin with paracetamol or ibuprofen?
- Major bleeding risk with Warfarin, DOACs, Clopidogrel, and NSAIDs.
- What are the side effects of Aspirin?
- Indigestion, nausea, or increased bruising or nosebleeds are relatively common at low dose. Tinnitus can occur with higher doses. See the sections below for more detail, including serious side effects and when to seek urgent help.
- Is aspirin a blood thinner like apixaban?
- It is an antiplatelet — it works differently from anticoagulants such as Apixaban. Some people take both under specialist supervision; never combine without medical advice.
- Can I take aspirin and ibuprofen together?
- Regular Ibuprofen can interfere with low-dose aspirin’s protective effect and increase stomach bleeding risk. Ask your GP or pharmacist for a safe pain plan.
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