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Side effects

Like all medications, statins can cause side effects. However, most people tolerate them well and don't experience any problems.

You should discuss the benefits and risks of taking statins with your doctor before you start taking the medication.

If you find certain side effects particularly troublesome, talk to the doctor in charge of your care. Your dose may need to be adjusted or you may need a different type of statin.

Some of the main side effects of statins are listed here. However, this isn't a complete list and some of these won't necessarily apply to the specific statin you're taking.

For details of the side effects of a particular statin, check the information leaflet that comes with your medicine.

Common side effects

Although side effects can vary between different statins, common side effects (which affect up to 1 in 10 people) include:

However, it's not clear whether most of the common problems people experience when taking statins are actually caused by the medication itself.

Uncommon side effects

Uncommon side effects of statins (which may affect up to 1 in 100 people) include:

Rare side effects

Rare side effects of statins (which may affect up to 1 in 1,000 people) include:

Muscle effects

Statins can occasionally cause muscle inflammation (swelling) and damage. Speak to your doctor if you have muscle pain, tenderness or weakness that can't be explained – for example, pain that isn't caused by physical work.

Your doctor may carry out a blood test to measure a substance in your blood called creatine kinase (CK), which is released into the blood when your muscles are inflamed or damaged.

If the level of CK in your blood is more than 5 times the normal level, your doctor may advise you to stop taking the statin. Regular exercise can sometimes lead to a rise in CK, so tell your doctor if you've been exercising a lot.

Once your CK level has returned to normal, your doctor may suggest you start taking the statin again, but at a lower dose.

Reporting side effects

The Yellow Card Scheme allows you to report suspected side effects from any type of medicine you're taking. It's run by a medicines safety watchdog called the Medicines and Healthcare Products Regulatory Agency (MHRA).

See the Yellow Card Scheme website for more information.