Rosuvastatin lowers cholesterol and reduces cardiovascular risk. It is one of the more potent statins, meaning a comparatively low dose achieves a large reduction, and it differs from simvastatin and atorvastatin in a way that matters practically.
It is processed by the body differently from those two, so it is affected far less by grapefruit and by the antibiotics and antifungals that cause problems with them. That is often why someone on several medicines is switched to rosuvastatin. It also means it can be taken at any time of day rather than specifically at night.
Common side effects during long-term use
- Muscle aches, stiffness or tenderness
- Headache
- Nausea, constipation or abdominal discomfort
- Dizziness
- Sleep disturbance
Muscle symptoms are dose-related and often resolve with a lower dose. Because rosuvastatin is potent, a reduced dose frequently still achieves a worthwhile cholesterol reduction, which makes dose adjustment a realistic option rather than a compromise.
Serious or persistent symptoms to discuss with a clinician
Get urgent help for severe muscle pain or weakness with dark, tea-coloured urine, particularly alongside fever or feeling generally unwell. This can indicate rhabdomyolysis, a rare breakdown of muscle tissue that can affect the kidneys. What separates it from ordinary aching is severity, real weakness rather than soreness, and the urine change.
Also contact a doctor for yellowing of the eyes or skin, dark urine with pale stools, persistent nausea with upper abdominal pain, or a rash that blisters or peels.
Protein in the urine is occasionally seen at higher doses and is usually detected on testing rather than noticed. Report passing much less urine than usual or unusual swelling.
Dose changes, missed doses and monitoring tests
Monitoring includes cholesterol and liver blood tests, with kidney function and a muscle enzyme test where relevant.
Two dosing points worth knowing. Reduced kidney function may call for a lower dose, since rosuvastatin is partly cleared by the kidneys. And a lower starting dose is generally recommended for people of Asian ancestry, because blood levels tend to run higher for the same dose. If that applies to you, it is a fair thing to confirm.
Stop and seek advice if you become pregnant or are planning pregnancy.
Interactions with OTC medicines and supplements
- Antacids containing aluminium or magnesium, which reduce absorption if taken at the same time. Separate them by a couple of hours.
- Warfarin, where INR may need rechecking after starting or changing dose.
- Some HIV medicines and ciclosporin, which raise rosuvastatin levels.
- Other cholesterol medicines, where combinations add muscle risk.
- Alcohol, where heavy use adds liver strain.
Grapefruit is much less of a concern than with simvastatin or atorvastatin, though it is still worth confirming with your pharmacist.
What to ask your doctor before changing treatment
- Is my dose right given my kidney function and background?
- Would a lower dose still give me most of the benefit?
- Are my muscle aches likely to be the statin?
- Do I need to separate it from my antacid?
- When were my liver and kidney tests last done?
Related chronic medication guides
- Statin side effects
- Cholesterol medication side effects
- Statins and the liver
- Managing chronic medication side effects
- Report a side effect in South Africa
See also atorvastatin compared with rosuvastatin.
Medical Disclaimer: This content is for informational and educational purposes only and does not constitute medical diagnosis, prescription, or professional advice. Always read the patient information leaflet and consult a qualified doctor or pharmacist regarding any medicine or health concern.