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Chest pain, breathlessness or collapse right now? Call 108 or 112.

Claim 04 · Heart and brain

Aspirin: "chew one for a heart attack, and for a stroke".

A tablet joined to a heart by a line and to a brain by a struck-through line A single round tablet in the centre. A plain line joins it to a heart outline on the left. The line to a simple brain outline on the right is struck through: aspirin for a heart attack only if a doctor or the 112 operator says so; never for a stroke.

As forwarded

"Chew an aspirin at the first sign of a heart attack, and also for a stroke."

Common as a two-line "life hack" in WhatsApp forwards and in the long "heart attack when alone" chain text (see Cough CPR). Reach figure: not available. Reach not available

Verdict

Dangerous

For a suspected heart attack, call 112 or 108 first and take aspirin only if the operator or your doctor says so; for a suspected stroke, never give aspirin, because if the stroke is a bleed it can make it worse; call 112 and note the time.

Supported if advised

On the heart-attack half:Call 112 or 108 first and take aspirin only if the operator or your doctor says so.

What the evidence says

Supported

Heart attack: partly right. Aspirin can reduce heart damage during a heart attack, but the Mayo Clinic's first-aid sequence is: call the local emergency number first, then "Don't take an aspirin unless your healthcare professional or emergency medical operator says to do so", and do not delay the call to take it. [S1] AHA News repeats that aspirin "may help if you're not allergic" after the emergency call is made. [S2] Reasons for the caveat: aspirin allergy, active bleeding or ulcer, and the risk that the "heart attack" is something else.

Dangerous

Stroke: wrong and harmful. The American Heart Association's stroke pages state: "Taking aspirin isn't advised during a stroke, because not all strokes are caused by blood clots. Some strokes are caused by ruptured blood vessels and taking aspirin could make these bleeding strokes more severe." Stroke is a medical emergency; call emergency services immediately. [S3]

Established

The NHS stroke pages use FAST (face, arms, speech, time to call the emergency number) and say "Do not drive yourself to A&E"; they do not instruct anyone to take aspirin. [S4][S5]

Established

In hospital, aspirin is given for ischaemic stroke within 24–48 hours of onset, and is delayed 24 hours after clot-busting therapy; this is a hospital decision after a brain scan has excluded bleeding. A bystander cannot tell a bleed from a clot. [S6]

What to do instead

  1. Suspected stroke: do the FAST check and call 112 immediately, even if symptoms fade. Note the time symptoms started (treatment windows depend on it). Never give aspirin, food or drink. [S4][S3]

  2. Suspected heart attack: call 112 or 108 first. Sit and rest; aspirin only if told by the operator or your doctor, and not if you are allergic to it or have active bleeding or an ulcer; your own prescribed nitroglycerin if you have it; CPR and an AED if the person collapses. [S1][S2]

  3. Do not drive yourself in either case. [S1][S4]

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Sources

  1. S1
    Mayo Clinic. Heart attack: first aid.Tier 4 · page dated 3 April 2026
    mayoclinic.org/first-aid/first-aid-heart-attack/basics/art-20056679
  2. S2
    American Heart Association News. Why cough CPR is not the lifesaver it's made out to be.Tier 2 body's news service · 22 January 2025; references the 2023 guideline review
    heart.org/en/news/2025/01/22/why-cough-cpr-is-not-the-lifesaver-its-made-out-to-be
  3. S3
    American Heart Association / American Stroke Association. Aspirin and stroke.Tier 2 · page date not shown
    stroke.org/en/life-after-stroke/preventing-another-stroke/aspirin-and-stroke
  4. S4
    NHS. Stroke: symptoms.Tier 4 · last reviewed 12 September 2024
    nhs.uk/conditions/stroke/symptoms
  5. S5
    NHS England. Stroke survivors and their savers call on people to Act F.A.S.T.Tier 4 · March 2023 campaign page
    england.nhs.uk/2023/03/stroke-survivors-and-their-savers-call-on-people-to-act-f-a-s-t-as-part-of-nhs-campaign
  6. S6
    Powers WJ et al. 2019 AHA/ASA guideline for the early management of acute ischaemic stroke. Stroke 2019; summarised by the American College of Cardiology.Tier 2 · 2019; a newer update may exist (not checked)
    acc.org/Latest-in-Cardiology/ten-points-to-remember/2019/11/06/15/31/Guidelines-for-the-Early-Management-of-AIS

Tiers are as graded in the research file. "Circulation only" sources document that a claim circulates and are never cited as evidence. Where a primary paper could not be opened, the page says so in the Honest note.

Reviewed by

Medical review: being arranged

Every evidence sentence on this page traces to the sources listed above, but no registered physician has yet signed it off. When one has, their name, registration number and date of review will appear here. Until then, read this page as a sourced guide, not as medical advice: for any symptom, call 108 or 112, or see a doctor.

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