Atorvastatin

• Lowering cholesterol where overall cardiovascular risk is raised
• Preventing a first heart attack or stroke in people at higher risk
• Preventing a second event in anyone who has already had one
• Familial hypercholesterolaemia, an inherited condition affecting roughly 1 in 250 people

It treats risk rather than symptoms. Nobody feels different on a statin, which is precisely why people stop taking them.

Once daily, at any time of day. Atorvastatin has a long half-life, so unlike simvastatin it does not need to be taken at night — take it whenever you will actually remember.

With or without food, either is fine.

Grapefruit juice interacts and should be avoided in significant quantities.

If you miss a dose, take the next one as normal. Do not double up.

Bloods before starting: a full lipid profile, liver function, and usually thyroid function and HbA1c — an untreated underactive thyroid raises cholesterol and is a reversible cause worth excluding first.

Bloods after starting: liver function at around three months, and lipids repeated to confirm the drug is doing what it should.

Notable interactions: clarithromycin and erythromycin, some antifungals, ciclosporin, certain HIV medicines, amlodipine (which may require a lower statin dose), and grapefruit juice. Tell any prescriber everything you take, including supplements.

Atorvastatin is inexpensive. It came off patent long ago and the generic is what virtually everyone receives.

On a private prescription the drug cost plus the pharmacy dispensing fee usually totals less than the England NHS prescription charge of around £10, and NHS prescriptions are free in Wales.

Where money genuinely gets wasted

• Repeat private cholesterol panels every few weeks. A lipid profile at three months tells you whether it is working; testing monthly tells you about day-to-day variation and nothing else
• Coenzyme Q10 supplements. Widely sold alongside statins for muscle aches. The evidence that they help is weak, and they are not cheap
• Red yeast rice, which contains a natural statin at an unpredictable dose with no monitoring — the drawbacks of a statin without the reliability

The one thing worth paying for is the baseline blood test — lipids, liver function and, where indicated, HbA1c and thyroid — because starting a statin without knowing the starting point makes the follow-up test uninterpretable.

There is no withdrawal effect and no taper. Cholesterol returns to its untreated level over roughly four to six weeks, and the cardiovascular risk reduction goes with it.

Muscle aches

This is the commonest reason people stop, and it is worth slowing down before doing so. Genuine statin muscle pain is usually symmetrical, affects the large muscles of the thighs, shoulders and upper arms, and starts within weeks of beginning or increasing the dose.

Trials in which people were given a statin and a placebo in alternating months found most attributed symptoms occurred on both. That does not mean the aches are imagined — it means the cause is often not the statin, and stopping a drug that is helping on the basis of an assumption is a poor trade.

The sensible sequence is: check vitamin D and thyroid, pause for a few weeks to see whether the pain actually resolves, then rechallenge at a lower dose or switch to rosuvastatin, often alternate-day. Most people who "cannot tolerate statins" can tolerate one of them at some dose.

When to stop straight away

Severe, widespread muscle pain with weakness and dark urine needs urgent assessment. It is rare, but it is the one that matters.

Also stop if you become pregnant, and discuss before trying to conceive.

Do statins actually cause muscle pain?

Sometimes, but far less often than it is blamed for. Blinded trials show most attributed aches occur on placebo too.

The aches are real; the cause frequently is not the statin. A structured pause and rechallenge settles it far better than guessing.

Do I have to take it at night?

Not with atorvastatin. It has a long duration of action, so any time of day works.

That advice comes from simvastatin, which is short-acting and genuinely does work better at night.

Will I be on it for life?

Usually, because it treats risk rather than a symptom. Stopping returns cholesterol to baseline within about a month.

Where a statin was started for primary prevention and circumstances have changed substantially, the decision is worth revisiting rather than assumed permanent.

Does it cause diabetes?

There is a small increase in the chance of crossing the diabetes threshold, mostly in people already close to it.

For anyone at meaningful cardiovascular risk the benefit clearly outweighs it — but it is a fair thing to know, and a reason to check HbA1c.

Can I drink alcohol?

In moderation, yes. Heavy drinking is the issue, because both alcohol and statins are processed by the liver.

What about grapefruit?

Large quantities raise atorvastatin levels. An occasional glass is not a problem; a daily habit is worth changing.

Rosuvastatin and pravastatin are unaffected if grapefruit matters to you.

Do I need liver tests?

Before starting and at around three months, then only if there is a reason.

Small rises are common and rarely require stopping.

Can I lower cholesterol without it?

Diet, exercise, weight loss and stopping smoking all help, and are worth doing regardless.

They rarely match a statin's effect on their own, particularly where the cholesterol is largely inherited — which is worth identifying rather than blaming on diet.