Pravastatin and Niacin: Interaction Details
AI-assisted, pharmacist-reviewed · Source data updated Aug 8, 2026 · Sources: FDA labeling, DDInter 2.0, cited literature
Niacin
Pravastatin
How we grade severity & evidence
Severity levels
- Contraindicated: These should generally not be used together.
- Major: Potentially serious — often needs a change or close monitoring.
- Moderate: Can be significant — usually manageable with monitoring.
- Minor: Usually limited clinical impact.
Evidence grades
- Established: Well documented — supported by controlled studies or strong clinical data.
- Probable: Good supporting evidence, though not definitively proven.
- Suspected: Some evidence suggests this interaction, but it is not well established.
- Possible: Limited or conflicting evidence; the interaction may occur.
- Theoretical: Predicted from the drugs' pharmacology; not yet confirmed in people.
Ratings come from the documented interaction literature and are reviewed by a pharmacist. They describe the documented risk of the combination, not what will necessarily happen to you — your dose, timing, and health picture all matter.
What happens
An increased risk of myopathy and rhabdomyolysis
Interaction Deep Dive
The concurrent use of niacin in lipid-lowering doses (1 gram/day or more) and pravastatin may increase the risk of myopathy. If concurrent therapy is required, consider reducing the pravastatin dose; monitor the patient for signs and symptoms of myopathy and rhabdomyolysis (muscle pain, tenderness, or weakness), and discontinue use if creatine kinase (CK) levels show a marked increase, or if myopathy or rhabdomyolysis is diagnosed or suspected. However, in clinical trials involving a small number of patients, there were no reports of myopathy in patients receiving concurrent niacin and pravastatin therapy1.
Why it happens (mechanism)
Unknown
Common questions
Can I take Pravastatin and Niacin together?
An increased risk of myopathy and rhabdomyolysis Always confirm with your pharmacist or prescriber before making any change.
How serious is the Pravastatin and Niacin interaction?
It is rated moderate. Can be significant — usually manageable with monitoring.
How quickly could this interaction happen?
The documented onset is "delayed". Effects tend to build up gradually over days to weeks.
How strong is the evidence for this interaction?
The evidence is graded "theoretical". Predicted from the drugs' pharmacology; not yet confirmed in people.
From our Q&A
Real reader questions about these medications, each personally answered by our pharmacist:
Questions for your pharmacist
- Does my dose of Pravastatin or Niacin need adjusting while I take them together?
- What symptoms should prompt me to call you or my prescriber right away?
- Does the timing of my doses matter for this combination?
- Is there anything you'd monitor while I'm on both?
References (1)
- Product Information: PRAVACHOL(R) oral tablets, pravastatin sodium oral tablets. Bristol-Myers Squibb Company (per FDA), Princeton, NJ, 2012. DailyMed
Keep reading about Niacin
Keep reading about Pravastatin
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