Drug & supplement interaction

Pantethine + Cobicistat

Cobicistat brand name: Tybost.

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 Cobicistat 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 label for Cobicistat states a food rule worth keeping to, and 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 Cobicistat

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 Cobicistat 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 Cobicistat and Pantethine? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
How we checked

Why No Interaction Is Listed for Cobicistat

Interactions in our licensed database are recorded against drug classes, not just single drug names. Cobicistat is filed under 2 classifications — cytochrome p450 3a4 (cyp3a4) inhibitors, oral drugs. Pantethine has documented interactions with 1 drug class — the most serious being anticoagulant/antiplatelet drugs (moderate) — and none of Cobicistat’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 — Cobicistat 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. Cobicistat)
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 Cobicistat 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

    Cobicistat

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

  • Diarrhea / Vomiting / Nausea 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.

    Cobicistat

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

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

Effects for Cobicistat 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 20,779 voluntary FDA FAERS reports for Cobicistat 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.

How to take them

Some Cobicistat Products Have a Food Rule — Pantethine Should Not Break It

At least one FDA label for a product containing Cobicistat says to take it with food. If you take Pantethine on an empty stomach out of habit, keep them separate — and take Cobicistat with a meal where the label says to.

This may not be true of your version. Food instructions belong to the product, not the ingredient: two Cobicistat products can carry different directions, and extended-release forms often differ from immediate-release ones. The label we read is quoted below — check the directions on your own box or bottle, or ask your pharmacist, for how to take the exact product you were given.

2 DOSAGE AND ADMINISTRATION TYBOST must be coadministered with atazanavir or darunavir at the same time, with food, and in combination with other HIV-1 antiretroviral agents.

From the Dosage and Administration section of the FDA label we read for Cobicistat — where that label names a specific product, the instruction is that product's. Read the label on DailyMed ›

A food rule is not an interaction — it is about how much of the medicine you absorb. The directions that came with your own product, and your pharmacist, outrank anything on this page.

Everything else you take

See Every Supplement That Interacts With Cobicistat

This page covers Pantethine only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Cobicistat page lists 30 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Adrafinil (moderate), Cannabidiol (cbd) (moderate), Cannabinol (cbn) (moderate) and Cannabis (moderate).

By severity: 1 major · 19 moderate · 10 minor.

From our pharmacist’s overview on the Cobicistat page

“Activated charcoal is the one entry to understand first if you take cobicistat (Tybost). Charcoal soaks up drugs in the gut, and since cobicistat's entire job is boosting an HIV medicine to protective levels, blunting its absorption can put the whole regimen at risk.”

Reviewed by 2 · Jul 18, 2026

Open the Cobicistat 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 Cobicistat, 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 Cobicistat 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 Cobicistat
Steady interest

#1,819 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 Cobicistat 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 Cobicistat

What Is Cobicistat Used For?

Brand name: Tybost

Tybost (cobicistat) is not itself an HIV treatment — it works by slowing the breakdown of certain HIV medicines so they stay active in your body long enough to work. Specifically, Tybost is used to boost the HIV medicines atazanavir or darunavir (once-daily dosing) as part of a complete HIV-1 treatment regimen in adults and in children weighing at least 14 kg (about 31 lbs).

Tybost is not interchangeable with ritonavir (another booster) for all HIV medicines. It is not recommended with darunavir twice-daily, fosamprenavir, saquinavir, or tipranavir.

Most-Reported Side Effects for Cobicistat

From FAERS, the FDA’s public side-effect reporting system (20,779 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.

Bone density decreased 8,112 reports
Chronic kidney disease 4,754 reports
Renal injury 4,577 reports
Tooth loss 4,186 reports
Bone loss 4,107 reports
See full Cobicistat 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 Cobicistat, 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 Cobicistat Together: Common Questions

Is it safe to take Pantethine with Cobicistat?
We do not list a known interaction between Pantethine and Cobicistat. 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 Cobicistat 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.
Should I take Pantethine and Cobicistat at the same time of day?
At least one FDA label for a product containing Cobicistat says to take it with food. If you take Pantethine on an empty stomach out of habit, keep them separate and take Cobicistat with a meal where the label says to. Food instructions belong to the product rather than the ingredient — two Cobicistat products can differ — so check the directions on your own box. This is about absorption, not an interaction.
How was the Pantethine and Cobicistat combination checked?
Interactions in our licensed database are recorded against drug classes. Cobicistat is filed under 2 classifications, and Pantethine has documented interactions with 1 drug class — none of Cobicistat'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 — Cobicistat 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 Cobicistat interact with any supplements?
Yes. Cobicistat has documented interactions with 30 supplements in our database — Pantethine is not one of them. The Cobicistat 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 Cobicistat drug information The full plain-English guide to this medication Cobicistat supplement interactions Every supplement checked against Cobicistat, 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 Cobicistat 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.