“I’ve been prescribed a statin, but should I take it in the morning or at night?”
“Is it true I can’t have grapefruit anymore?”
“Will I need to take this for the rest of my life?”
If you’ve been prescribed a statin to lower your cholesterol, knowing how to take it correctly helps it work as well as possible and makes the routine easier to stick to. Statins are one of the most widely prescribed and well-studied medicines in the UK, and small practical details (when you take it, what to take it with, what to look out for) genuinely matter.
In this guide, we’ll cover the four statins most commonly prescribed at Summerhill Health, Simvastatin, Atorvastatin, Pravastatin, and Rosuvastatin, with practical advice on dosing, timing, interactions, and what to expect.
At Summerhill Health, Dr Natalie Summerhill (MBBS, RCGP 2015, DRCOG, DFSRH) prescribes within NICE and RCGP guidance, with cholesterol treatment always set in the context of your wider cardiovascular health, your medical history, and your personal risk. Since founding the clinic in 2021, she has built a practice grounded in thorough primary care diagnostics and evidence-based screening.
Please note: This guide provides general information only. Always follow the specific instructions Dr Summerhill has given you and the patient information leaflet that comes with your medication, and contact us if you’re unsure about anything.
Why Statins Are Prescribed and How They Work
Statins lower the amount of “bad” cholesterol (LDL cholesterol) in your blood. They work by blocking an enzyme in the liver called HMG-CoA reductase, which the body uses to make cholesterol. With less cholesterol being produced, the liver pulls more of it out of your bloodstream, and your overall levels fall.
This matters because raised LDL cholesterol is one of the main drivers of cardiovascular disease, the build-up of fatty deposits in the arteries that can lead to heart attacks and strokes. Lowering it reduces that risk.
Statins are usually prescribed in one of two situations:
- Primary prevention: You haven’t had a cardiovascular event, but your overall risk is high enough that lowering your cholesterol is worthwhile.
- Secondary prevention: You’ve already had an event such as a heart attack or stroke, or have established heart disease, and lowering your cholesterol helps protect against another.
They may also be prescribed for inherited conditions such as familial hypercholesterolaemia, where cholesterol is high from a young age.
How to Take Simvastatin
Simvastatin is a widely used statin, best taken in the evening.
- The usual dose is 10mg to 40mg once daily.
- Take it at night. Your body makes most of its cholesterol while you sleep, and simvastatin is short-acting, so an evening dose works best.
- The 80mg dose is rarely used now, because it carries a higher risk of muscle side effects. The MHRA (Medicines and Healthcare products Regulatory Agency) advises against starting 80mg due to the significantly increased risk of myopathy and rhabdomyolysis. It’s reserved for specific situations under close review.
- Avoid grapefruit and grapefruit juice. Grapefruit raises the level of simvastatin in your blood and increases the risk of side effects.
- Simvastatin interacts with a number of other medicines, including some antibiotics, antifungals, and certain heart medications. Always tell us about everything you take, including anything bought over the counter.
How to Take Atorvastatin
Atorvastatin is a stronger, longer-acting statin, which gives it more flexibility around timing.
- The dose ranges from 10mg to 80mg once daily.
- Following NICE guidance, 20mg is a common starting dose for primary prevention, while 80mg is often used for secondary prevention after a cardiovascular event.
- You can take it at any time of day, because it stays active in your system for much longer than simvastatin. Pick a time you’ll remember and keep it consistent.
- It can be taken with or without food.
- Large amounts of grapefruit juice can raise atorvastatin levels, so it’s sensible to avoid drinking it in quantity.
How to Take Pravastatin
Pravastatin is a gentler statin, often chosen when interactions with other medicines are a concern.
- The usual dose is 10mg to 40mg once daily.
- Take it at night, as with simvastatin.
- It can be taken with or without food.
- Pravastatin is processed by the body differently from simvastatin and atorvastatin, so grapefruit is not a concern and it has fewer drug interactions. This makes it a useful option for people taking medications that clash with other statins.
How to Take Rosuvastatin
Rosuvastatin is the most potent of these four statins, so lower doses can achieve a large reduction in cholesterol.
- The usual dose is 5mg to 20mg once daily, and can go up to 40mg where needed (the highest dose is usually started under specialist advice).
- You can take it at any time of day, with or without food, as it’s long-acting.
- Grapefruit does not significantly affect it.
- Some people, including those of South Asian background, may be started on a lower dose, as blood levels of the drug can be higher. Dr Summerhill will take this into account when prescribing.
Comparing the Four Statins
There is no single “best” statin. The right choice depends on how much you need to lower your cholesterol, your other medications, and how you tolerate treatment. Dr Summerhill will talk you through the options and recommend the one likely to suit you best.
| Feature | Simvastatin | Atorvastatin | Pravastatin | Rosuvastatin |
|---|---|---|---|---|
| Strength | Moderate | High | Lower | Highest |
| Usual dose | 10mg to 40mg | 10mg to 80mg | 10mg to 40mg | 5mg to 20mg (up to 40mg) |
| When to take | In the evening | Any time of day | In the evening | Any time of day |
| Grapefruit? | Avoid | Avoid large amounts | Not a concern | Not a concern |
| Often suited to | Standard cholesterol lowering | Higher-intensity lowering, flexible timing | People with interaction concerns | Strong lowering at a low dose |
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What to Expect When Starting Treatment
Most people take statins without any difficulty. They are typically a long-term treatment, because their protective effect continues only while you take them.
- Your cholesterol is usually rechecked with a blood test around 3 months after starting, to see how well the dose is working.
- We also check your liver function before you start, again within the first few months, and at around 12 months. This is routine monitoring, not a sign anything is wrong.
- If your cholesterol hasn’t fallen as much as hoped, the dose may be increased or the statin switched.
The aim is steady, lasting protection, so it’s worth giving treatment time to settle and keeping up with your reviews.
Side Effects and Muscle Symptoms
The most talked-about statin side effect is muscle symptoms, so it’s worth being clear about them.
Mild muscle aches are fairly common, but studies show they’re often not actually caused by the statin itself. Many people who stop a statin because of aches can take it again without trouble.
That said, you should report any unexplained muscle pain, tenderness, or weakness, particularly if it’s severe, widespread, or comes with feeling generally unwell. Very rarely, statins can cause a serious muscle problem called rhabdomyolysis, which needs prompt assessment.
Other possible effects include headache, digestive symptoms such as feeling sick or constipated, and disturbed sleep. These are usually mild and often settle.
If side effects are bothering you, don’t simply stop the medication. Contact us first, as there’s often a good solution, whether that’s a different dose, a different statin, or a change in timing.
Storage
- Store your tablets at room temperature, away from direct heat, moisture, and sunlight.
- Keep them in the original packaging.
- Keep all medication out of reach of children, and do not use beyond the expiry date.
Frequently Asked Questions
Does it matter what time of day I take my statin?
It depends which one. Simvastatin and pravastatin are best taken in the evening, as they’re short-acting and your body makes most cholesterol overnight. Atorvastatin and rosuvastatin are long-acting and can be taken at any time of day, as long as you’re consistent.
Can I drink grapefruit juice if I take statins?
Avoid it with simvastatin, and avoid large amounts with atorvastatin, as grapefruit raises the level of these medicines in your blood. With pravastatin and rosuvastatin it isn’t a concern.
Will I need to take a statin for life?
Usually, yes. Statins protect you only while you’re taking them, so if you stop, your cholesterol will rise again and your risk returns. We’ll review your treatment regularly to make sure it remains right for you.
Do statins cause muscle pain?
Muscle aches are commonly reported, but the evidence shows they’re often not caused by the statin itself. Genuine statin-related muscle problems are uncommon, and serious ones are rare. Always report unexplained or persistent muscle pain so we can check it properly.
Can I just improve my diet instead of taking statins?
Diet, exercise, weight, and not smoking all make a real difference to cholesterol and heart health, and we’ll always support you with these. For some people lifestyle changes are enough, but where your risk is high, a statin offers protection that lifestyle alone often cannot match. We’ll help you find the right balance.
Can I drink alcohol while taking a statin?
Moderate drinking is generally fine, but heavy or regular drinking can affect your liver, which is also involved in processing the medication. Keeping within UK guidance is sensible.
When to Contact the Clinic
Get in touch if:
- You have unexplained muscle pain, tenderness, or weakness.
- You’re experiencing side effects that aren’t settling.
- You’re starting a new medication and want to check it’s safe alongside your statin.
- You have any questions or concerns about your treatment.
Seek urgent medical advice if you experience severe muscle pain alongside dark-coloured urine, yellowing of the skin or eyes, severe stomach pain, or any sign of a serious allergic reaction such as swelling or difficulty breathing. These are rare but need immediate assessment.
Ready to Take the Next Step?
If you’ve been prescribed a statin, are due a cholesterol review, or simply want a clearer picture of your heart health, our team at Summerhill Health is here to help. Our cardiac screening and blood testing make it straightforward to understand your risk and act on it, with same-day and evening appointments available.
Contact us on 0161 552 2382 or book an appointment online.
