Clopidogrel is a prescription antiplatelet medicine. It reduces your risk of getting blood clots by affecting cells in your blood called platelets.

It's also called Plavix and Grepid.

This page covers:

When clopidogrel is used

You may be given clopidogrel if you have or have had:

These situations mean you're at an increased chance of getting a serious blood clot. Taking clopidogrel can help reduce this risk.

Treatment may be for a few weeks or months, or it may be lifelong.

How and when to take clopidogrel

Clopidogrel comes as a tablet that you take once a day.

The usual dose is 75mg a day, although occasionally a single higher dose – such as 300mg or 600mg – may be recommended to begin with.

  • Take clopidogrel at the same time each day, with or without food.
  • Don't stop taking it unless advised by a doctor – sometimes you may be told to stop taking it for a short time, such as before surgery.
  • If you forget to take a dose and it's more than 12 hours until you're due to take your next one, take the missed dose as soon as you remember.
  • If you forget to take a dose and it's less than 12 hours until you're due to take your next one, skip the missed dose and take your next one as normal – don't take a double dose to make up for a missed one as this can be dangerous.
  • If you accidentally take an extra dose or doses, contact your GP or call NHS Direct Wales on 0845 46 47 for advice.

Side effects of clopidogrel

Clopidogrel can cause side effects, but not everyone gets them.

Some side effects are listed below. Check the leaflet that comes with your medication for a full list.

Common side effects

The following are common side effects that affect between 1 in 10 and 1 in 100 people:

Tell your doctor if these side effects bother you or don't go away.

Serious side effects

Less common, but more serious side effects, include:

Go to your nearest accident and emergency (A&E) department if you think you're having an allergic reaction.

Speak to your doctor or call NHS 111 Wales (if available in your area) or 0845 46 47 immediately if you have any other worrying or unusual side effects while taking clopidogrel.

Taking clopidogrel with other medicines, food and alcohol

Taking clopidogrel with other medications can affect how well either medication works, or increase your chances of getting side effects.

For example, this can happen if clopidogrel is taken with:

Always read the leaflet that comes with your medication to check if it's safe to take. If you're not sure, ask a pharmacist or your GP for advice.

No foods affect clopidogrel. You can drink alcohol while taking it, but try to not to drink too much because this may irritate your stomach.

Who may not be able to take clopidogrel

Check with your doctor before taking clopidogrel if you:

  • have a stomach ulcer, or have had stomach ulcers in the past
  • have had bleeding on your brain (brain haemorrhage)
  • have haemophilia or another bleeding disorder
  • have a liver or kidney problem
  • have had an allergic reaction to any medication before
  • are taking other medications – this can sometimes cause problems
  • are pregnant or breastfeeding

Clopidogrel should only be taken by children if recommended by a specialist doctor.

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The information on this page has been adapted by NHS Wales from original content supplied by NHS UK NHS website nhs.uk
Last Updated: 06/05/2020 10:18:43