Drug interactions
Atorvastatin + Saquinavir
Severity: Major
Atorvastatin and Saquinavir: major interaction.
Last updated Sources: US FDA label
For healthcare professionals — reference only. This page is a brief summary, not medical advice and not a substitute for official labeling or clinical judgement. Always verify before prescribing or dispensing.
Summary
Saquinavir, usually given with ritonavir, raises atorvastatin exposure considerably. This increases the risk of myopathy and rhabdomyolysis.
What this interaction means in plain words
Atorvastatin and Saquinavir can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for.
Why it happens
Inhibition of intestinal and hepatic CYP3A4 and of OATP1B1-mediated hepatic uptake reduces atorvastatin clearance.
What to do
Use the lowest effective atorvastatin dose, not exceeding 20 mg daily, or switch to a statin less dependent on CYP3A4 such as pravastatin or rosuvastatin at a reduced dose. Counsel the patient to report unexplained muscle pain and check CK if symptoms occur.
What to ask your pharmacist
- Does the benefit of taking both outweigh the risk in my case?
- Do I need any blood test, ECG or other check while on both?
- What early warning signs should I watch for, and what should I do if they appear?
Pro+ members
Unlock the full page
Create an account and start a Pro+ trial to unlock the full management advice for Atorvastatin and Saquinavir, the additional notes, the evidence detail and the whole-prescription interaction checker.
- Full clinical management advice
- Additional notes
- Evidence detail
- Interaction checker for a whole prescription
Try Pro+ free for 7 days on the web. No card needed.
References
Other interactions of Atorvastatin
- Atorvastatin + Tipranavir Contraindicated
- Atazanavir + Atorvastatin Major
- Atorvastatin + Clarithromycin Major
- Atorvastatin + Cobicistat Major
- Atorvastatin + Cyclosporin Major
- Atorvastatin + Danazol Major
Frequently asked questions
Can I take Atorvastatin with Saquinavir?
MediHelp rates the interaction as major. Atorvastatin and Saquinavir can interact in a way that may be serious. Using them together is sometimes necessary, but it needs a deliberate decision by the prescriber, a plan for monitoring, and clear advice on the warning signs to watch for. Saquinavir, usually given with ritonavir, raises atorvastatin exposure considerably. This increases the risk of myopathy and rhabdomyolysis.
How serious is the interaction between Atorvastatin and Saquinavir?
MediHelp rates it major, on a four-level scale (minor, moderate, major, contraindicated) based on published labels and references. What to do, in brief: Use the lowest effective atorvastatin dose, not exceeding 20 mg daily, or switch to a statin less dependent on CYP3A4 such as pravastatin or rosuvastatin at a reduced dose. Counsel the patient to report unexplained muscle pain and check CK if symptoms occur.
What other medicines interact with Atorvastatin?
MediHelp also lists interactions of Atorvastatin with, for example, Tipranavir, Atazanavir, Clarithromycin. The full list is on the Atorvastatin page.
Full monographs, dosing and an interaction checker in the MediHelp app
Open the complete reference, check multi-drug interactions and use dosing tools in the MediHelp app.
