A statin (cholesterol-lowering medicine)
Atorvastatin
A widely used statin that lowers LDL ("bad") cholesterol to reduce the risk of heart attack and stroke.
What is Atorvastatin?
Atorvastatin is a statin that lowers LDL ('bad') cholesterol to cut the risk of heart attack and stroke. It is taken as a long-term once-daily tablet, both to prevent a first cardiovascular event in higher-risk people and to protect those who already have heart or vascular disease.
Education and reference only. This is a plain-language guide to Atorvastatin — it deliberately contains no doses. Doses depend on the person, the brand and the reason for treatment, and belong with your prescriber. Always check the BNF, the product labelling (SmPC) and follow medical advice.
What it is
Atorvastatin is one of the most commonly prescribed statins in the UK. It lowers cholesterol — particularly LDL ("bad") cholesterol — and is used both to prevent a first heart attack or stroke in people at raised cardiovascular risk (primary prevention) and to protect people who already have heart or vascular disease (secondary prevention). It is taken as a long-term, once-daily tablet and works quietly in the background; the benefit is measured in reduced cardiovascular risk over years, not in how you feel day to day.
How it works
Atorvastatin blocks an enzyme in the liver (HMG-CoA reductase) that the body uses to make cholesterol. With less cholesterol being produced, the liver pulls more LDL cholesterol out of the blood, so circulating levels fall. Lower LDL means less cholesterol is laid down in artery walls, which is how statins reduce the risk of heart attacks and strokes over time.
Company & origin
Originated / developed by: Pfizer (originated at Warner-Lambert/Parke-Davis).
Atorvastatin was discovered by Bruce Roth and colleagues at Warner-Lambert (Parke-Davis) in 1985 in the United States and was first approved by the FDA in 1996, marketed as Lipitor. After Pfizer acquired Warner-Lambert in 2000, it went on to become the best-selling prescription drug in history.
What it treats
Conditions Atorvastatin is used for
Practical use
How to take Atorvastatin
General, dose-free guidance — always follow your prescriber's and the leaflet's specific instructions.
- Taken once a day, and unlike some older statins it can be taken at any time of day.
- Swallow the tablet whole with water; it can be taken with or without food.
- If you miss a dose, skip it and take the next one as usual — do not double up.
- Avoid large amounts of grapefruit juice, which can raise atorvastatin levels.
- Tell your doctor promptly if you get severe or widespread muscle pain or weakness, or dark-coloured urine.
- Keep taking it long-term; stopping lets cholesterol and risk drift back up.
Weighing it up
Advantages & disadvantages of Atorvastatin
Advantages
- Strong evidence for reducing heart attacks and strokes.
- Once daily and can be taken at any time of day.
- Inexpensive generic, widely available.
- Generally well tolerated by most people.
Disadvantages
- Can cause muscle aches in some people (true intolerance is uncommon).
- Needs occasional blood tests to check the liver.
- Interacts with some medicines and grapefruit.
- Works silently — benefit is long-term risk reduction, not a felt effect.
Practical use
Good to know
It is usually taken once a day and can be taken at any time of day with atorvastatin (unlike some older statins that work best at night). It is taken long-term, and stopping it allows cholesterol — and risk — to drift back up. Muscle aches should be reported, though most people tolerate it well, and many reported "statin" symptoms turn out not to be caused by the statin when tested.
Who should not take it / use with caution
- People with active liver disease, or unexplained persistently raised liver blood tests.
- Women who are pregnant, planning pregnancy or breastfeeding — statins are stopped beforehand.
- Used with caution and dose review alongside certain other medicines (see interactions) and in significant kidney or muscle disease.
Monitoring
- Cholesterol (lipid) levels to confirm response
- Liver blood tests around starting and as advised
- Reported muscle symptoms
Side effects
- Often none. The most talked-about effect is muscle aches; genuine muscle injury is uncommon but should be reported.
- Occasional headache, digestive upset, or disturbed sleep.
- Rarely, a rise in liver enzymes (checked on blood tests) or, very rarely, serious muscle breakdown — report severe, widespread or persistent muscle pain, especially with dark urine.
Key interactions
- Grapefruit juice can raise atorvastatin levels — avoid large amounts.
- Some antibiotics and antifungals, certain HIV medicines and others can raise levels and muscle-injury risk — the prescriber checks for these.
- Care alongside other cholesterol or fibrate medicines.
Available as: Tablets (several strengths). A liquid is sometimes available for people who cannot swallow tablets.
Answers
Atorvastatin: frequently asked questions
When should I take atorvastatin — morning or night?
Atorvastatin works just as well taken at any consistent time of day, so you can take it whenever you will remember it. (This differs from some shorter-acting statins, which are best taken in the evening.)
Do I have to take it for life?
Usually it is long-term, because the cholesterol-lowering — and the reduction in heart-attack and stroke risk — only continues while you take it. Don't stop without discussing it; cholesterol and risk rise again if it is stopped.
It is giving me muscle aches — should I stop?
Tell your prescriber rather than just stopping. Muscle aches are common and often not actually caused by the statin; this can be tested by pausing and re-challenging or trying an alternative. Severe or widespread muscle pain, especially with dark urine, needs prompt review.
What is the difference between atorvastatin and Lipitor?
They are the same medicine — atorvastatin is the generic (active-ingredient) name and Lipitor is a brand name. Generic atorvastatin contains the identical active ingredient.
Can I drink grapefruit juice with it?
Large amounts of grapefruit juice can raise atorvastatin levels and the risk of side effects, so it is best avoided or kept small. Occasional small amounts are generally considered low-risk, but check with your pharmacist.
The wider class
About Statins
Atorvastatin belongs to the statins class. For how the class as a whole works, its shared safety principles and monitoring, see the full guide.
Browse by body system
Authoritative sources
- BNF: Atorvastatin.
- electronic Medicines Compendium (SmPC): Atorvastatin.
- NICE CKS: Atorvastatin.
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