Crestor and grapefruit: a real interaction?
Grapefruit is famous as the juice that interacts with medications, and the warning is real for a number of drugs. Whether it matters specifically for Crestor (Rosuvastatin) at 5mg, 10mg, 20mg, 40mg depends on whether the active ingredient Rosuvastatin is metabolised by CYP3A4 in the gut wall and how much that pathway contributes to first-pass metabolism.
The CYP3A4 mechanism
Grapefruit (and its juice) inhibits CYP3A4 enzymes in the gut wall, increasing the absorbed dose of medications metabolised by that enzyme. For drugs in the Cardiovascular Medications class that go through CYP3A4 first-pass metabolism, regular grapefruit consumption can raise plasma levels of Rosuvastatin by a clinically meaningful margin and amplify side effects.
What to do with Crestor
According to the prescribing information for Rosuvastatin, if grapefruit is flagged as an interaction, the safest practice is to avoid grapefruit entirely or to discuss timing with the prescriber. Rosuvastatin competitively inhibits HMG-CoA reductase, the rate-limiting enzyme in hepatic cholesterol synthesis. A small occasional serving may be tolerable; daily large servings around the time of Crestor dosing are not recommended at 5mg, 10mg, 20mg, 40mg.
Frequently asked questions
Can I eat grapefruit while on Crestor? ▾
For some Cardiovascular Medications medications, grapefruit is best avoided or limited because of CYP3A4 inhibition. Whether Crestor specifically is affected depends on Rosuvastatin; the prescribing information lists this. When in doubt, ask the pharmacist or check the patient leaflet.
How much grapefruit is too much with Crestor? ▾
For drugs where the interaction matters, even modest daily grapefruit intake (one whole grapefruit or one large glass of juice) can shift drug levels noticeably. For Crestor at 5mg, 10mg, 20mg, 40mg, individual tolerance varies; the cautious choice is to avoid grapefruit if any interaction is mentioned.
More on Crestor
- With alcoholCrestor and alcohol — is it safe to drink?
- With foodShould Crestor be taken with food?
- Side effectsCrestor side effects: common, rare and warning signs
- Dosage guideCrestor dosage guide: how much to take and when
- OnsetHow fast does Crestor start working?
- DurationHow long does Crestor last?
The information on this website is provided for reference and educational purposes only. It does not replace consultation with a qualified healthcare professional.