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Patient information A-Z


Clopidogrel helps to stop blood clots. It lowers the risk of you having a heart attack or stroke. It is usually given to people:

  • Who have already had a heart attack.
  • Who have already had a stroke.
  • Who have angina.
  • Who have problems with their blood circulation that could lead to a heart attack or stroke.

Taking your clopidogrel

The usual dose of clopidogrel is one tablet once a day in the morning.

  • Some patients take clopidogrel alone but some patients take clopidogrel and aspirin. Follow your doctor's advice about taking clopidogrel with aspirin.
  • Some patients take clopidogrel all the time but some patients only take a short course. Follow your doctor's advice. Do not stop taking it unless your doctor tells you to.

Problems to watch for

  • You might get side effects like headache, feeling sick, indigestion and 'flu' symptoms.
  • Tell the doctor if you notice any signs of bleeding like nose bleeds or bruising of your skin.
  • Tell the doctor before you take clopidogrel if you have:
    • Liver disease
    • Stomach ulcers
  • Tell the doctor if you have any unusual reaction to clopidogrel.
  • Always tell a doctor or dentist who treats you that you take clopidogrel.
  • Always tell the pharmacist you take clopidogrel before you buy any medicines from the chemist shop.
  • Women who are pregnant or breast feeding should talk to the doctor before taking clopidogrel. The doctor will want to discuss the risks and benefits of taking clopidogrel with you.

We are smoke-free

Smoking is not allowed anywhere on the hospital campus. For advice and support in quitting, contact your GP or the free NHS stop smoking helpline on 0800 169 0 169.

Other formats

Help accessing this information in other formats is available. To find out more about the services we provide, please visit our patient information help page (see link below) or telephone 01223 256998.

Contact us

Cambridge University Hospitals
NHS Foundation Trust
Hills Road, Cambridge

Telephone +44 (0)1223 245151