COX-2 selective NSAID
Celecoxib 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 Celecoxib (Celecoxib) at 50mg, 100mg, 200mg, 400mg depends on whether the active ingredient Celecoxib 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 COX-2 selective NSAID class that go through CYP3A4 first-pass metabolism, regular grapefruit consumption can raise plasma levels of Celecoxib by a clinically meaningful margin and amplify side effects.
What to do with Celecoxib
According to the prescribing information for Celecoxib, if grapefruit is flagged as an interaction, the safest practice is to avoid grapefruit entirely or to discuss timing with the prescriber. Celecoxib selectively inhibits cyclooxygenase-2 (COX-2), the enzyme isoform induced at sites of inflammation, which produces the prostaglandins responsible for pain, fever and inflammation. A small occasional serving may be tolerable; daily large servings around the time of Celecoxib dosing are not recommended at 50mg, 100mg, 200mg, 400mg.
Frequently asked questions
Can I eat grapefruit while on Celecoxib? ▾
For some COX-2 selective NSAID medications, grapefruit is best avoided or limited because of CYP3A4 inhibition. Whether Celecoxib specifically is affected depends on Celecoxib; the prescribing information lists this. When in doubt, ask the pharmacist or check the patient leaflet.
How much grapefruit is too much with Celecoxib? ▾
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 Celecoxib at 50mg, 100mg, 200mg, 400mg, individual tolerance varies; the cautious choice is to avoid grapefruit if any interaction is mentioned.
Products containing Celecoxib
More on Celecoxib
- With alcoholCelecoxib and alcohol — is it safe to drink?
- With foodShould Celecoxib be taken with food?
- Side effectsCelecoxib side effects: common, rare and warning signs
- Dosage guideCelecoxib dosage guide: how much to take and when
- OnsetHow fast does Celecoxib start working?
- DurationHow long does Celecoxib last?
The information on this website is provided for reference and educational purposes only. It does not replace consultation with a qualified healthcare professional.