Drug & supplement interaction

Pantethine + Losartan Potassium

Losartan Potassium brand name: Cozaar.

No Known Interaction
Medically reviewed by · Updated July 2026 · Pair last verified Sep 13, 2026
The bottom line No known interaction

We found no known interaction between Pantethine and Losartan Potassium in our sources. Absence of a documented interaction is not the same as proven safety, and does not guarantee one does not exist. Do not start, stop, or change a medication or supplement based on this page; confirm with your pharmacist or doctor first. Additionally, although there is no interaction, the two are separately associated with some of the same side effects, which would make a new symptom harder to attribute to one or the other.

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Interaction report

Pantethine and Losartan Potassium

We checked these two against our interaction database. Here is what we found.

No Known Interaction Found

We did not find a documented interaction between Losartan Potassium and Pantethine in our sources. This does not guarantee that the combination is completely free of risk — there is often limited research on supplements and herbal products, especially around drug interactions.

If you decide to take both, the practical routine is simple: add one new thing at a time and note the date you started it. If the combination is going to disagree with you, it usually shows in the first days to a couple of weeks — and a start date turns “I’ve been feeling off” into something a pharmacist can actually work with. Do not stop a prescribed medicine on your own.

Always talk with your pharmacist or doctor before making changes to your medications or supplements, particularly if you take several medications or have an ongoing health condition.

Pantethine safety at a glance

Pantethine overall Use caution Generally well tolerated in studies, but long-term safety data are limited.
Pregnancy Use caution Not enough reliable safety data, so it is best to avoid unless your doctor advises otherwise.
Breastfeeding Use caution Safety during breastfeeding has not been well studied, so caution is advised.

Safety guidance is general; always confirm with your pharmacist or doctor for your situation.

Still wondering about combining Losartan Potassium and Pantethine? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
How we checked

Why No Interaction Is Listed for Losartan Potassium

Interactions in our licensed database are recorded against drug classes, not just single drug names. Losartan Potassium is filed under 7 classifications — including angiotensin receptor blockers (arbs), cytochrome p450 2c9 (cyp2c9) substrates, antihypertensive drugs. Pantethine has documented interactions with 1 drug class — the most serious being anticoagulant/antiplatelet drugs (moderate) — and none of Losartan Potassium’s classifications are among them.

Classification data comes from our licensed Natural Medicines dataset. A medication can belong to classes beyond those recorded there, so this describes how the check was run — it is not a safety guarantee.

Keep it in perspective

Pantethine Does Interact With Other Medications

Pantethine has 122 moderate known drug interactions in our database — Losartan Potassium isn’t one of them. If you take anything else, check it against the full list below.

Moderate 122 No known interaction 2,708 (incl. Losartan Potassium)
Taking anything else?

Check Another of Your Medications Against Pantethine

Covers the 2,830 medications we’ve checked against Pantethine. Pick one to open its full report.

What to actually watch for

No Interaction Found — But Data Suggests Pantethine and Losartan Potassium May Share Several of the Same Side Effects

This is not an interaction. Neither one changes how your body handles the other, and nothing here says they react together. What our sources do show is that each has separately been linked to the effects below — so taking both can make those effects more likely to turn up, and harder to pin on one or the other if they do.

  • Itching Additional detail

    Pantethine

    “Orally, mild pruritus has been reported but is uncommon.”

    Pantethine · Natural Medicines adverse-effect record, reported in pruritus.

    2 sources cited
    1. 8862. Coronel F, Tornero F, Torrente J, et al. Treatment of hyperlipemia in diabetic patients on dialysis with a physiological substance. Am J Nephrol 1991;11:32-6.. PubMed
    2. 67748. McRae MP. Treatment of hyperlipoproteinemia with pantethine: A review and analysis of efficacy and tolerability. Nutrition Res 2005;25:319-333. DOI

    Losartan Potassium

    Listed in the ADVERSE REACTIONS section of the FDA label for Losartan Potassium. Read the label on DailyMed ›

  • Diarrhea / Nausea / Vomiting reported in 5.9% of FDA reports for Losartan Potassium Additional detail

    Pantethine

    “The most common adverse effects to pantethine are mild gastrointestinal complaints such as nausea, vomiting, diarrhea, epigastric discomfort, bloating, and flatulence.”

    Pantethine · Natural Medicines adverse-effect record, reported in diarrhea.

    6 sources cited
    1. 8315. Da Col PG, Cattin L, Fonda M, et al. Pantethine in the treatment of hypercholesterolemia: a randomized double-blind trial versus tiadenol. Curr Ther Res 1984;36:314-22.
    2. 8316. Rubba P, Postaiglione B, De Simone F, et al. Comparative evaluation of the lipid-lowering effects of fenofibrate and pantethine in type II hyperlipoproteinemia. Curr Ther Res 1985;38:719-27.
    3. 8862. Coronel F, Tornero F, Torrente J, et al. Treatment of hyperlipemia in diabetic patients on dialysis with a physiological substance. Am J Nephrol 1991;11:32-6.. PubMed
    4. 67725. Rumberger, J. A., Napolitano, J., Azumano, I., Kamiya, T., and Evans, M. Pantethine, a derivative of vitamin B(5) used as a nutritional supplement, favorably alters low-density lipoprotein cholesterol metabolism in low- to moderate-cardiovascular risk No
    5. 67748. McRae MP. Treatment of hyperlipoproteinemia with pantethine: A review and analysis of efficacy and tolerability. Nutrition Res 2005;25:319-333. DOI
    6. 67754. Cattin, L., Da Col, P. G., Fonda, M., Mameli, M. G., and Fergulio, G. A. Treatment of hypercholesterolemia with pantethine and fenofibrate; open randomized study on 43 subjects. Current Therapeutic Research 1985;38(Sep):386-395.

    Losartan Potassium

    Listed in the ADVERSE REACTIONS section of the FDA label for Losartan Potassium, and in voluntary FDA adverse-event reports. Read the label on DailyMed ›

Reported for Pantethine but not commonly for Losartan Potassium: stomach upset and bloating or gas.

Effects for Losartan Potassium come from the ADVERSE REACTIONS section of its FDA label; effects for Pantethine come from the Natural Medicines adverse-effect record, quoted above. Where a percentage is shown, it is the share of 89,498 voluntary FDA FAERS reports for Losartan Potassium that mention that effect — a reporting proportion, not an incidence rate and not evidence the drug caused it. Wording is matched across sources by our own clinical vocabulary, so treat this as a prompt to pay attention, not a diagnosis.

From our Q&A

Questions About Pantethine or Losartan Potassium

These are real questions from readers, answered by the pharmacists at HelloPharmacist — written by a person, not generated from a database. Each one covers Pantethine or Losartan Potassium, not necessarily both, but if one is close to what you were about to ask it will usually go further than a database entry can:

Not quite your question? Ask our pharmacists directly — it is free, there is no account required, and answers usually come back within 24 hours.

Everything else you take

See Every Supplement That Interacts With Losartan Potassium

This page covers Pantethine only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Losartan Potassium page lists 253 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), American Hellebore (major), American Mistletoe (major), Grapefruit (major) and St. John's Wort (major).

By severity: 6 major · 205 moderate · 42 minor.

From our pharmacist’s overview on the Losartan Potassium page

“Losartan potassium (Cozaar) treats high blood pressure, and this is a list to respect, because six of its 253 supplement interactions carry a major rating. Most entries do one of two things.”

Reviewed by 2 · Jul 18, 2026

Open the Losartan Potassium interaction page

One more smart check

Taking Pantethine as Part of a Dietary Supplement Product? Check It for Interactions

We hold 302 real supplement products containing Pantethine, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Pantethine. Even though Pantethine itself has no known interaction with Losartan Potassium, another ingredient on your label might. Find your product and we’ll check every ingredient on its label:

How much people look this up

Where Pantethine and Losartan Potassium Sit Against Everything Else

Out of every supplement and medication people look up on HelloPharmacist, here is where these two land this week — and which way each has been moving.

Supplement Pantethine
Top 25%

#354 of 1,452 supplements looked up here in the last 7 days

29 days ago today
Medication Losartan Potassium
Top 10

#6 of 2,830 medications looked up here in the last 7 days

29 days ago today

Position among everything looked up on this site, not a measure of how commonly either one is used or how important it is. A supplement can climb this list because of a news story. It counts every request to the page, automated ones included, and nothing here identifies anyone.

Where does our data come from?
  • Source: the Natural Medicines (TRC Healthcare) clinical database — the evidence-graded professional reference for herb & supplement interactions.
  • Citation library: 103,510 references behind our interaction content, 65,311 of them resolved to verified PubMed/DOI sources. See every Pantethine reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 13, 2026. The Pantethine and Losartan Potassium records this page draws on were last updated July 10, 2026.
  • What “no known interaction” means: no documented interaction in the sources above — not a guarantee of safety. Supplements are studied far less than prescription drugs, so we say exactly what the evidence supports, and nothing more.
Data structure & sourcing designed and verified by .
Supplement

About Pantethine

What is Pantethine?

  • High cholesterol
  • High triglycerides
  • Heart health support
  • General vitamin B5 supplementation

Pantethine is a derivative of vitamin B5 (pantothenic acid) that some studies suggest may modestly lower cholesterol and triglycerides. The evidence is limited and not strong enough to replace standard treatments, so talk with your pharmacist or doctor before using it, especially if you have heart or cholesterol concerns.

Not applicable (a form of vitamin B5/pantothenic acid) · Capsules, tablets, softgels

An interaction check asks whether these two react with each other — it does not ask whether Pantethine is a good idea for someone in your situation. Here is what our Pantethine record says about it on its own.

Pantethine: dosing

There is no official, standardized dose of pantethine for any condition. They can help you decide whether pantethine makes sense for you and what amount may be appropriate.

From our Pantethine monograph — the full record covers uses, side effects and every documented interaction.

Read the full Pantethine monograph & all interactions
Medication

About Losartan

What Is Losartan Used For?

Brand name: Cozaar

Losartan tablets — available as branded Cozaar and several generic products — are used to treat high blood pressure (hypertension) in adults and children 6 years and older. Lowering blood pressure reduces the risk of strokes and heart attacks. Losartan tablets are also used to reduce the risk of stroke in people with high blood pressure who also have left ventricular hypertrophy (an enlarged left side of the heart). Note: evidence suggests this stroke-risk benefit may not apply to Black patients.

Losartan tablets are additionally approved to protect the kidneys in people with type 2 diabetes, high blood pressure, and signs of kidney damage (diabetic nephropathy). Arbli, the oral suspension form, shares these same approved uses.

Most-Reported Side Effects for Losartan Potassium

From FAERS, the FDA’s public side-effect reporting system (89,498 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.

Fatigue 6,464 reports
Nausea 5,301 reports
Diarrhea 5,184 reports
Dyspnea 4,689 reports
Dizziness 4,429 reports
See full Losartan drug information
Keep checking

Other Drugs & Pantethine

Browse every other medication we’ve checked against Pantethine — both the ones with a known interaction and the ones without. Select any drug for the full detail.

0Major
122Moderate
0Minor
2,707No known interaction
122 Moderate 2,707 No interaction
Moderate

122 interactions

Showing 60 of 122 moderate interactions — see all 122 on the Pantethine page.

No interaction 2,707 drugs checked — show the list

We also checked Pantethine against these medications and found no known interaction in our sources. Open any page to confirm.

Showing the 60 most looked-up of 2,707 medications checked with no known interaction — see the full Pantethine list.

See the full Pantethine interactions page
See every supplement checked against Losartan Potassium, ranked by severity
Evidence & sources

Pantethine References

The 9 references that drive our Pantethine monograph and interaction data, from the evidence-graded Natural Medicines (TRC Healthcare) database. Citations with a link open the study on PubMed or the publisher’s site.

  1. Da Col PG, Cattin L, Fonda M, et al. Pantethine in the treatment of hypercholesterolemia: a randomized double-blind trial versus tiadenol. Curr Ther Res 1984;36:314-22.
  2. Rubba P, Postaiglione B, De Simone F, et al. Comparative evaluation of the lipid-lowering effects of fenofibrate and pantethine in type II hyperlipoproteinemia. Curr Ther Res 1985;38:719-27.
  3. Coronel F, Tornero F, Torrente J, et al. Treatment of hyperlipemia in diabetic patients on dialysis with a physiological substance. Am J Nephrol 1991;11:32-6.. PubMed
  4. Agrati AM, Ambrosi G, Ferraro G, Palmieri. Gemfibrozil efficacy vs pantethine in dyslipoproteinemic patients: a controlled study. Curr Ther Res 1989;45:650-63.
  5. Rumberger, J. A., Napolitano, J., Azumano, I., Kamiya, T., and Evans, M. Pantethine, a derivative of vitamin B(5) used as a nutritional supplement, favorably alters low-density lipoprotein cholesterol metabolism in low- to moderate-cardiovascular risk No
  6. Hiramatsu, K., Nozaki, H., and Arimori, S. Influence of pantethine on platelet volume, microviscosity, lipid composition and functions in diabetes mellitus with hyperlipidemia. Tokai J.Exp.Clin.Med. 1981;6(1):49-57.
  7. McRae MP. Treatment of hyperlipoproteinemia with pantethine: A review and analysis of efficacy and tolerability. Nutrition Res 2005;25:319-333. DOI
  8. Cattin, L., Da Col, P. G., Fonda, M., Mameli, M. G., and Fergulio, G. A. Treatment of hypercholesterolemia with pantethine and fenofibrate; open randomized study on 43 subjects. Current Therapeutic Research 1985;38(Sep):386-395.
  9. Evans M, Rumberger JA, Azumano I, Napolitano JJ, Citrolo D, Kamiya T. Pantethine, a derivative of vitamin B5, favorably alters total, LDL and non-HDL cholesterol in low to moderate cardiovascular risk subjects eligible for statin therapy: a triple-blinded

Medication overviews come from MedlinePlus (NIH); supplement label data from the NIH Dietary Supplement Label Database. Content is written and reviewed by licensed HelloPharmacist pharmacists — see our data sources and editorial standards.

Pharmacist Counseling Corner

Taking Pantethine and Losartan Potassium Together: Common Questions

Is it safe to take Pantethine with Losartan Potassium?
We do not list a known interaction between Pantethine and Losartan Potassium. That does not guarantee the combination is risk-free, so confirm with your pharmacist or doctor — especially if you take other medications or have a health condition.
Do Pantethine and Losartan Potassium have any of the same side effects?
Yes — our sources link each of them separately to 4 of the same effects. That is not an interaction: neither changes how your body handles the other. It does mean that if one of those effects turns up, it can be harder to tell which one is behind it. They are listed on this page with the source behind each.
How was the Pantethine and Losartan Potassium combination checked?
Interactions in our licensed database are recorded against drug classes. Losartan Potassium is filed under 7 classifications, and Pantethine has documented interactions with 1 drug class — none of Losartan Potassium's classifications are among them. A medication can belong to classes beyond those recorded in our dataset, so this describes how the check was run rather than guaranteeing safety.
Does Pantethine interact with any other medications?
Yes. Pantethine has 122 documented drug interactions in our database — Losartan Potassium is simply not one of them. If you take anything else, it is worth checking each one; they are all listed on this page.
Does Losartan Potassium interact with any supplements?
Yes. Losartan Potassium has documented interactions with 253 supplements in our database — Pantethine is not one of them. The Losartan Potassium interaction page linked on this page lists every one, ranked by severity.

Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy

Where next

Keep Exploring

Pantethine monograph Uses, safety profile, and every drug interaction in one place Losartan drug information The full plain-English guide to this medication Losartan Potassium supplement interactions Every supplement checked against Losartan Potassium, ranked by severity Supplement interaction checker Check any supplement or product against your medications Browse medications A–Z Every drug we’ve checked against herbs & supplements References The 9 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Losartan Potassium and Pantethine?

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This information is for education only and is not a substitute for professional medical advice. Always check with your pharmacist or doctor before starting, stopping, or combining supplements and medications.