What happens when you take pravastatin with grapefruit?
Grapefruit juice contains compounds called furanocoumarins (notably bergamottin and 6',7'-dihydroxybergamottin) that irreversibly inhibit the gut-wall enzyme CYP3A4. For drugs metabolized through CYP3A4, that means a much larger fraction of an oral dose reaches the bloodstream — which is why grapefruit can dramatically raise levels of certain statins.
Pravastatin (Pravachol) is the exception. It is not significantly metabolized by CYP3A4. Instead, it is cleared mostly unchanged through the liver and kidneys via different pathways (including OATP1B1 uptake into hepatocytes). Because the CYP3A4 chokepoint isn't involved, there is essentially no "grapefruit effect" on pravastatin's pharmacokinetics.
This has been studied directly. A Japanese pharmacokinetic study comparing atorvastatin and pravastatin found that repeated grapefruit juice intake significantly raised atorvastatin acid and its metabolites — but produced no significant effect on pravastatin disposition. Reviews of statin–grapefruit interactions in major journals (American Journal of Medicine, Mayo Clinic Proceedings) consistently classify pravastatin as not affected.
Why is this important?
If you've been told to avoid grapefruit on a previous statin, this matters. Patients sometimes assume the warning applies to all cholesterol medications and quit eating grapefruit unnecessarily — which is a small loss in a diet that should already favor fruit. It also matters because clinicians sometimes choose pravastatin specifically because a patient drinks a lot of grapefruit juice or takes multiple CYP3A4 substrates.
From a safety standpoint, the absence of a grapefruit interaction is one of pravastatin's selling points. It is generally considered one of the most "interaction-light" statins, alongside rosuvastatin and pitavastatin.
That said, no interaction with grapefruit doesn't mean pravastatin has no interactions at all. It can still interact with drugs that affect OATP1B1 (such as cyclosporine and clarithromycin), and patients on those medications need separate guidance.
What should you do?
Continue enjoying grapefruit and grapefruit juice in normal dietary amounts while taking pravastatin. There is no need to time the fruit away from the dose, and there is no realistic amount of grapefruit that has been shown to raise pravastatin levels meaningfully.
Two practical caveats:
- Tell your prescriber and pharmacist about heavy grapefruit intake anyway. If you ever start a second medication that is CYP3A4-dependent (many blood pressure pills, some sedatives, some immunosuppressants), they will want to know.
- If you also take a different statin in the household, don't generalize. Simvastatin, lovastatin, and atorvastatin all interact strongly with grapefruit. Make sure your bottle says pravastatin before relaxing the rule.
If your clinician recently switched you off another statin because of a grapefruit conflict, this is the upgrade in convenience you got — eat the fruit.
Which specific products are affected?
This applies to all pravastatin products, including branded Pravachol and generics, at all approved doses (10 mg, 20 mg, 40 mg, 80 mg).
By contrast, the grapefruit interaction is clinically important for:
- Lovastatin (Mevacor, Altoprev) — AUC can rise more than 10-fold with high-dose grapefruit juice.
- Simvastatin (Zocor, FloLipid, Vytorin) — large AUC increases and FDA warning labels.
- Atorvastatin (Lipitor, Caduet) — moderate AUC increase, generally clinically manageable but worth knowing.
And it is not meaningful for rosuvastatin (Crestor), fluvastatin (Lescol), or pitavastatin (Livalo, Zypitamag).
The bottom line
Pravastatin doesn't go through the CYP3A4 enzyme that grapefruit inhibits, so grapefruit and grapefruit juice in normal dietary amounts are fine with this statin. Confirm the medication name on your bottle, mention heavy grapefruit intake to your prescriber, and apply different rules if you ever switch to lovastatin, simvastatin, or atorvastatin.