Pravastatin Drug Interactions: What to Avoid and What to Tell Your Doctor

One of Pravastatin's biggest advantages over other statins is its relatively low risk of drug interactions. Because Pravastatin is not significantly metabolized by CYP3A4 enzymes — unlike Atorvastatin and Simvastatin — it avoids many of the interactions that affect other statins. However, Pravastatin does have meaningful interactions you need to know about, particularly those that increase the risk of muscle damage. Here's a complete guide.

Why Does Pravastatin Have Fewer Drug Interactions Than Some Other Statins?

Most drug interactions with statins happen because many statins are metabolized by cytochrome P450 enzymes (especially CYP3A4) in the liver. When another drug inhibits these enzymes, statin levels can rise dangerously high, increasing the risk of muscle damage (myopathy and rhabdomyolysis). Pravastatin bypasses this pathway — it is not a significant CYP3A4 substrate. Instead, it is transported by OATP1B1 transporters in the liver, which leads to a different (and generally shorter) list of clinically significant interactions.

Contraindicated Combinations (Avoid Completely)

Gemfibrozil (Lopid)

Gemfibrozil is a fibrate used to lower triglycerides. It inhibits OATP1B1, the main transporter responsible for moving Pravastatin into liver cells. When this transporter is blocked, Pravastatin accumulates in the bloodstream at much higher levels than intended. The combination of gemfibrozil and any statin significantly raises the risk of myopathy and rhabdomyolysis. This combination should be avoided. If you need both a statin and a fibrate, fenofibrate (not gemfibrozil) is the safer fibrate choice to use with a statin.

Red Yeast Rice

Red yeast rice supplements contain monacolin K, which is chemically identical to lovastatin (a prescription statin). Taking red yeast rice with Pravastatin essentially combines two statin-like compounds, which can dramatically increase the risk of myopathy and rhabdomyolysis. Do not take red yeast rice supplements while on Pravastatin.

Serious Interactions (Use With Caution / Dose Adjustment Required)

Cyclosporine (Gengraf, Neoral, Sandimmune)

Cyclosporine, an immunosuppressant used after organ transplants, is a potent OATP1B1 inhibitor. When taken with Pravastatin, it can increase Pravastatin blood levels significantly. Patients on cyclosporine should start with Pravastatin 10 mg once daily and should not exceed 20 mg per day. Despite this dose cap, Pravastatin is often preferred over other statins in transplant patients because the interaction is more predictable and manageable than with statins that are also CYP3A4 substrates.

Colchicine (Colcrys, Lodoco, Mitigare)

Colchicine, used for gout, can increase the toxicity of statins through a pharmacodynamic interaction — meaning both drugs affect the same biological pathways and their combined effect on muscle tissue can cause harm. Cases of rhabdomyolysis and at least one fatality have been reported with the Pravastatin-colchicine combination. If your doctor prescribes both, monitor closely for muscle pain, weakness, or dark urine.

Clarithromycin and Other Macrolide Antibiotics

Clarithromycin (Biaxin) increases Pravastatin levels via P-glycoprotein (P-gp) efflux transporter inhibition. While Pravastatin's CYP3A4-independent metabolism makes it less vulnerable to macrolide interactions than Simvastatin or Lovastatin, the effect is still clinically meaningful. Patients taking clarithromycin should not exceed Pravastatin 40 mg daily.

HIV Protease Inhibitors

Some HIV antiretrovirals — including lopinavir/ritonavir (Kaletra) and darunavir/ritonavir — can increase Pravastatin levels. Pravastatin is generally preferred in HIV patients over CYP3A4-metabolized statins (like Simvastatin, which is contraindicated with protease inhibitors), but specific HIV medication combinations should still be checked in a drug interaction database. Start with the lowest effective Pravastatin dose and titrate cautiously.

Moderate Interactions (Monitor Carefully)

Niacin (nicotinic acid): High-dose niacin combined with any statin increases myopathy risk. If your doctor prescribes both, watch for muscle pain and report it immediately.

Fenofibrate: Less risk than gemfibrozil, but can still slightly increase myopathy risk. This combination is approved and sometimes prescribed. Monitor for muscle symptoms.

Dronedarone (Multaq): This antiarrhythmic drug can increase Pravastatin exposure. Monitor closely.

Minor Interactions

Bile acid sequestrants (cholestyramine, colestipol, colesevelam): These medications bind to Pravastatin in the gut and reduce its absorption. To avoid this, take Pravastatin at least 1 hour before or 4 hours after your bile acid sequestrant.

Aspirin and antacids: Modest interactions; generally not clinically significant at usual doses but worth mentioning to your provider.

Food and Supplement Interactions

Grapefruit juice: Unlike Simvastatin and Lovastatin, Pravastatin does NOT have a significant grapefruit juice interaction. This is because grapefruit inhibits CYP3A4, an enzyme that Pravastatin does not rely on. Pravastatin is safe to take with grapefruit juice.

Alcohol: Not a direct pharmacokinetic interaction, but alcohol raises triglycerides and stresses the liver. Limit alcohol intake while taking Pravastatin.

Niacin supplements (B3): High-dose niacin raises myopathy risk with statins. Discuss any niacin supplements with your provider before taking them.

What to Tell Your Doctor

Before starting Pravastatin, or if you're adding a new medication to your regimen, tell your prescriber about all of the following:

All prescription medications — including immunosuppressants, HIV medications, antibiotics, and heart medications

All over-the-counter medications — including niacin, antacids, aspirin, and NSAIDs

All dietary supplements — especially red yeast rice, fish oil, CoQ10, and herbal supplements

Related reading: Pravastatin Side Effects: What to Expect | What Is Pravastatin? Uses and Dosage Guide