Just started on a blood thinner? 6 things worth knowing

Being put on a blood thinner (an anticoagulant) is very common, but it changes a few everyday things. Here is a plain-English checklist of what's worth knowing in the first few weeks. It doesn't replace advice from your GP, pharmacist or anticoagulation clinic, so always follow what they tell you.

1. Know exactly what you take, and why

Blood thinners include warfarin and the newer tablets such as apixaban, rivaroxaban, edoxaban and dabigatran. Know the name, the dose and the reason you were prescribed it. Your pharmacist can usually give you an anticoagulant alert card to carry.

2. Don't ignore a bump to the head

If you take a blood thinner, a knock to the head carries a higher risk of sudden or delayed bleeding, even if you feel fine at first. NHS ambulance services advise people on anticoagulants to get advice from their GP or NHS 111 after a head injury, and to call 999 in an emergency.

3. Tell every healthcare professional

Dentists, pharmacists, opticians and anyone planning a procedure need to know you're on a blood thinner. It can change how they treat you.

4. Check before taking anything new

Some over-the-counter medicines, painkillers and herbal supplements can affect how blood thinners work or increase bleeding. Ask your pharmacist before you take something new.

5. Know the warning signs

Unusual bruising, nosebleeds that won't stop, blood in your urine, black or bloody stools, coughing or vomiting blood, or a sudden severe headache all need medical attention. Your patient information leaflet lists what to look out for.

6. Make sure people can tell, even if you can't

After a fall or an accident you may not be able to explain your medication. A medical alert bracelet engraved with BLOOD THINNER lets paramedics and first aiders see it at a glance, and a filled-in emergency card in your wallet gives them the details.

This article is general information only and is not medical advice. If you're unsure about anything, speak to your GP, pharmacist or call NHS 111.