Selective estrogen receptor modulator (SERM)
Raloxifene 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 Raloxifene (Raloxifene) at 60mg depends on whether the active ingredient Raloxifene 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 Selective estrogen receptor modulator (SERM) class that go through CYP3A4 first-pass metabolism, regular grapefruit consumption can raise plasma levels of Raloxifene by a clinically meaningful margin and amplify side effects.
What to do with Raloxifene
According to the prescribing information for Raloxifene, if grapefruit is flagged as an interaction, the safest practice is to avoid grapefruit entirely or to discuss timing with the prescriber. Raloxifene binds estrogen receptors and produces tissue-selective effects: estrogen-agonist activity in bone (preserving bone mineral density) and on lipid metabolism (lowering LDL cholesterol), while… A small occasional serving may be tolerable; daily large servings around the time of Raloxifene dosing are not recommended at 60mg.
Frequently asked questions
Can I eat grapefruit while on Raloxifene? ▾
For some Selective estrogen receptor modulator (SERM) medications, grapefruit is best avoided or limited because of CYP3A4 inhibition. Whether Raloxifene specifically is affected depends on Raloxifene; the prescribing information lists this. When in doubt, ask the pharmacist or check the patient leaflet.
How much grapefruit is too much with Raloxifene? ▾
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 Raloxifene at 60mg, individual tolerance varies; the cautious choice is to avoid grapefruit if any interaction is mentioned.
Products containing Raloxifene
More on Raloxifene
- With alcoholRaloxifene and alcohol — is it safe to drink?
- With foodShould Raloxifene be taken with food?
- Side effectsRaloxifene side effects: common, rare and warning signs
- Dosage guideRaloxifene dosage guide: how much to take and when
- OnsetHow fast does Raloxifene start working?
- DurationHow long does Raloxifene last?
The information on this website is provided for reference and educational purposes only. It does not replace consultation with a qualified healthcare professional.