Can You Take Astaxanthin With Eplerenone and Amiloride?
A reader taking eplerenone and amiloride for high blood pressure, with a history of asthma and a recent elevated p-tau blood test, asks whether it's okay to add an astaxanthin supplement and another product to their regimen.
If I'm taking eplerenone and amiloride, may I take astaxanthin as well? I have a history of asthma and high blood pressure. Testing for p-tau17 indicated an elevated number. I am also interested in taking MMM.
Jul 16, 2026- There is no well-documented interaction between astaxanthin and eplerenone or amiloride, and astaxanthin is generally well tolerated. Since you are taking two potassium-sparing medications together, your doctor should be monitoring your potassium and kidney function regularly. You should avoid potassium supplements and potassium-based salt substitutes.
Hello, and thanks for reaching out to us!
There is no well-documented interaction between astaxanthin and either eplerenone or amiloride, and astaxanthin is generally well tolerated.
Still, your situation has a few moving parts worth talking through, starting with the two medications you're already taking, because the way they work together shapes the advice about anything you add on top.
Potassium Is the Main Thing to Watch With Your Current Medications
Eplerenone and amiloride are both potassium-sparing medications, meaning they lower blood pressure while causing your body to hold on to potassium rather than lose it in the urine.
Taking two potassium-sparing drugs together isn't a common combination, and it raises the risk of high potassium levels (hyperkalemia), which is why your doctor should be checking your potassium and kidney function regularly.
If that combination was intentionally prescribed by your doctor, that's fine and I certainly have seen it, but it's worth confirming they're aware you're on both.
In the meantime, be careful with potassium supplements and potassium-based salt substitutes, and keep up with your lab work. As a practical note, amiloride is usually taken with food.
Astaxanthin With Asthma and High Blood Pressure
There's no known concern with astaxanthin and asthma, and it doesn't interact with common asthma medications like albuterol inhalers.
As for blood pressure, a few small studies have hinted that astaxanthin may have mild blood pressure-lowering effects, but the evidence is thin and inconsistent. We don't even list this in our own supplement/drug interaction checker.
Regardless, since you're already on two blood pressure medications, that's simply one more reason to monitor your readings at home when you start it and share anything unusual with your doctor.
Your p-tau Result and the 'MMM' Supplement
You mentioned an elevated p-tau result, which I suspect refers to p-tau217, a newer blood biomarker doctors use when evaluating memory concerns and possible Alzheimer's disease. Interpreting that number really depends on your full clinical picture, so that conversation belongs with the doctor who ordered the test.
Unfortunately, I'm not sure what 'MMM' refers to, since several products go by similar abbreviations. If you can submit another question to us with the full product name or a photo of the ingredient label, I'd be happy to look at it against your medication list, because that's the safest way to check it properly.
Final Words
Overall, astaxanthin isn't expected to cause a serious problem with eplerenone or amiloride, though a theoretical effect on how eplerenone is metabolized makes it worth mentioning to your prescriber, and the bigger priority is making sure your potassium is being monitored on that two-drug combination.
Reach out anytime with the details on that other supplement, and take care!
References & sources
Glossary — Terms in This Answer
- Potassium-sparing
- A type of medication that lowers blood pressure while helping your body keep potassium instead of losing it through urine.
- Hyperkalemia
- A condition where you have too much potassium in your blood, which can be dangerous.
- Kidney function
- How well your kidneys are working to filter waste and excess water from your blood.
- Biomarker
- A measurable substance in your blood or body that doctors use to detect disease or health conditions.
- P-tau217
- A newer blood test marker that doctors check when concerned about memory problems and possible Alzheimer's disease.
- Metabolized
- The process by which your body breaks down and processes a drug so it can work or be eliminated.
- Eplerenone
- A potassium-sparing blood pressure medication that helps your body retain potassium.
- Amiloride
- A potassium-sparing water pill used to lower blood pressure while preventing potassium loss.
Dr. Brian Staiger, PharmD
Doctor of Pharmacy, board certified clinical pharmacist (BCPS), American Herbalist Guild, Medication Therapy Management certified
Brian Staiger, PharmD, BCPS, is a licensed pharmacist with more than 13 years of experience across retail pharmacy, clinical pharmacy, medication safety, pharmacy program development, and healthcare administration. He is the founder of HelloPharmacist.com, where he helps patients...
More answers from Brian →