Aspirin to prevent blood clots
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Revisione paritaria di Dr Colin Tidy, MRCGPUltimo aggiornamento di Michael Stewart, MRPharmSUltimo aggiornamento 21 Apr 2024
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For people who have heart or blood vessel disease, taking low-dose aspirin each day can reduce the risk of heart attack and stroke.
The usual dose is one low-dose aspirin tablet (75 mg) each day.
If you ever suspect that a child has accidentally swallowed some aspirin, contact your doctor for advice straightaway.
In questo articolo:
About aspirin to prevent blood clots
Tipo di medicinale | An antiplatelet medicine |
Utilizzato per | To prevent clots from forming in blood vessels |
Chiamato anche | Acetylsalicylic acid |
Disponibile come | Tablets, gastro-resistant (enteric coated) tablets and soluble (dispersible) tablets |
How does low-dose aspirin work?
Torna ai contenutiAspirin works by making platelets in the blood less sticky. Platelets help stop bleeding, but sometimes they can clump together inside a blood vessel and form a clot. This can block blood flow and cause a heart attack or stroke.
Low-dose aspirin (75 mg) helps stop platelets from sticking together, which reduces the risk of blood clots. It is often used for people with heart or blood vessel disease, or those who have had a heart attack, stroke, or heart surgery.
Low-dose aspirin is available with or without a prescription, but you should only take it regularly if your doctor recommends it, as it isn’t suitable for everyone.
At higher doses, aspirin is used to relieve pain and high temperature (fever). There is more information about this use of aspirin in a leaflet called Aspirina per il dolore o la febbre.
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Side effects of low-dose aspirina
Torna ai contenutiCommon side effects of aspirin are:
Nausea.
Indigestion.
Dolore allo stomaco.
Bleeding more easily (such as nosebleeds or bruising).
Troverai un elenco completo nel foglietto informativo del produttore fornito con il tuo medicinale.
How to manage low-dose aspirin side effects
Torna ai contenutiGli effetti indesiderati spesso migliorano man mano che il tuo corpo si adatta al nuovo medicinale, ma parla con il tuo medico o farmacista se uno dei seguenti persiste o diventa problematico.
Common aspirin side effects | Cosa posso fare se sperimento questo? |
Feeling sick, indigestion | Stick to simple foods, and if you are not doing so, take your dose of aspirin after a meal. If this continues, speak with your doctor for further advice |
Increased risk of bleeding | If you notice any unexplained bleeding, speak with a doctor for advice |
Importante: aspirin may cause allergic reactions; this is more common in people who have asthma. Stop taking aspirin and speak with a doctor urgently if you have an allergic reaction or develop any breathing difficulties.
Se si verificano altri sintomi che ritieni possano essere dovuti alle compresse, parla con il tuo medico o farmacista per ulteriori consigli.
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Who should not take low-dose aspirin?
Torna ai contenutiSome medicines aren’t suitable for everyone. Before taking aspirin to prevent blood clots, it’s important your doctor knows:
Se sei incinta o stai allattando.
Se hai mai avuto un'ulcera allo stomaco.
If you have asthma.
If you are under 16 years of age.
Se hai problemi con il funzionamento del tuo fegato o con il funzionamento dei tuoi reni.
If you have a blood disorder such as haemophilia, or glucose-6-phosphate dehydrogenase (G6PD) deficiency.
If you have gout.
If you have ever had an unusual or allergic-type reaction after taking aspirin or a non-steroidal anti-inflammatory drug (NSAID).
NSAIDs include ibuprofene, diclofenac, indometacina e naprossene. You should also let your doctor know if you have ever had an allergic reaction to any other medicine.
If you are taking any other medicines. This includes any medicines you are taking which are available to buy without a prescription, as well as herbal and complementary medicines.
How to take low-dose aspirin
Torna ai contenutiBefore taking aspirin, read the leaflet inside the pack for important information and possible side effects.
You will usually be advised to take one 75 mg tablet once a day, unless your doctor tells you differently. Take it exactly as prescribed.
Take aspirin at the same time each day to help you remember. Many people take it in the morning with breakfast.
Check what type of aspirin you have:
Dispersible tablets should be mixed with water and taken with food to protect your stomach.
Gastro-resistant (enteric-coated) tablets can be taken without food. Swallow them whole with water and do not chew them.
If you are taking gastro-resistant tablets, do not take indigestion remedies in the 2 hours before or after your dose.
If you miss a dose, take it when you remember unless it’s the next day. Do not take two doses at once.
Ottenere il massimo dal tuo trattamento
Torna ai contenutiKeep all your regular appointments with your doctor. This is so your doctor can check on your progress.
Before taking any over-the-counter medicines, ask your pharmacist if they are safe with aspirin.
Do not take other medicines that contain aspirin or anti-inflammatory painkillers such as ibuprofene, including many cold and flu remedies.
Aspirin should not be given to children under 16 unless prescribed, because it may be linked to Reye’s syndrome, a very rare but serious illness.
If you are due to have an operation or dental treatment, tell the person carrying out the treatment that you are taking aspirin. This is because any bleeding may take longer than normal to stop.
If a child accidentally takes aspirin, go to A&E immediately. Take the medicine packaging with you, even if it is empty.
How to store low-dose aspirin
Torna ai contenutiTenere tutti i medicinali fuori dalla portata e dalla vista dei bambini.
Conservare in un luogo fresco e asciutto, lontano da fonti di calore e luce diretta.
Informazioni importanti su tutti i medicinali
Torna ai contenutiInformazioni importanti su tutti i medicinali
Non assumere mai più della dose prescritta. Se sospetti che tu o qualcun altro possa aver assunto un sovradosaggio di questo medicinale, recati al pronto soccorso del tuo ospedale locale. Porta con te il contenitore, anche se è vuoto.
Questo medicinale è per te. Non darlo mai ad altre persone, anche se la loro condizione sembra essere la stessa della tua.
Non conservare medicinali scaduti o indesiderati. Portali alla tua farmacia locale che li smaltirà per te.
Se hai domande su questo medicinale, chiedi al tuo farmacista.
Segnala effetti collaterali di un medicinale o vaccino
Se si verificano effetti collaterali, è possibile segnalarli online tramite il sito web Yellow Card.
Domande frequenti
Torna ai contenutiHow long does it take for aspirin to prevent blood clots?
Aspirin starts to reduce platelet stickiness within about 1 hour of taking a dose. However, its full protective effect against blood clots is usually reached after several days of taking it daily.
Is it safe to take aspirin as a blood thinner long-term?
Yes, low-dose aspirin can be taken long-term as a blood thinner, but only under a doctor’s supervision. Long-term use can increase the risk of stomach irritation, ulcers, or bleeding, so your doctor will weigh the benefits against the risks and may recommend stomach protection if needed.
Can anyone take aspirin to prevent blood clots?
No, not everyone should take aspirin to prevent blood clots. It is only recommended for people with heart or blood vessel problems, a history of heart attack or stroke, or high clot risk, and should never be taken by children under 16 or anyone without a doctor’s advice
Video consigliati per Trattamento e prevenzione delle malattie cardiache

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Ulteriori letture e riferimenti
- Manufacturer's PIL, Aspirin 75 mg Gastro-resistant tablets; Dexcel Pharma Ltd, The electronic Medicines Compendium. Dated May 2021.
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Storia dell'articolo
Le informazioni su questa pagina sono scritte e revisionate da clinici qualificati.
Prossima revisione prevista: 8 Mar 2027
21 Apr 2024 | Ultima versione

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