Drug & supplement interaction

Vanadium + Cobicistat

Cobicistat brand name: Tybost.

No Known Interaction
The bottom line No known interaction

We found no known interaction between Vanadium 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

Vanadium 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 Vanadium 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.

Vanadium safety at a glance

Vanadium overall Use caution Small dietary amounts are fine, but supplement doses can cause side effects and may be toxic at high levels.
Pregnancy Likely Safe When used orally in amounts found in foods. Read the full pregnancy detail
Breastfeeding Likely Safe When used orally in amounts found in foods. There is insufficient reliable information available about the safety of vanadium when used in amounts greater than... Read the full breastfeeding detail

Pregnancy & breastfeeding ratings are from Natural Medicines (Therapeutic Research Center) — the full detail is in the Special populations card below. Safety guidance is general; always confirm with your pharmacist or doctor for your situation.

Still wondering about combining Cobicistat and Vanadium? 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. Vanadium has documented interactions with 2 drug classes — the most serious being anticoagulant/antiplatelet drugs (moderate) and antidiabetes 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

Vanadium Does Interact With Other Medications

Vanadium has 208 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.

Taking anything else?

Check Another of Your Medications Against Vanadium

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

What to actually watch for

No Interaction Found — But Data Suggests Vanadium 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. 3 of them are worth acting on rather than waiting out — marked below.

  • Kidney problems Worth acting on reported in 44.9% of FDA reports for Cobicistat Additional detail

    Vanadium

    “In some cases, patients with diabetes have used very high doses (100 mg daily) of vanadium safely for up to 4 weeks. However, there is concern based on animal research that prolonged use of high doses might cause serious side effects including kidney damage.”

    Vanadium · Natural Medicines adverse-effect record, reported in diabetes.

    5 sources cited
    1. 3055. Halberstam M, Cohen N, Shlimovich P, et al. Oral vanadyl sulfate improves insulin sensitivity in NIDDM but not in obese nondiabetic subjects. Diabetes 1996;45:659-66. PubMed
    2. 3056. Cohen N, Halberstam M, Shlimovich P, et al. Oral vanadyl sulfate improves hepatic and peripheral insulin sensitivity in patients with non-insulin-dependent diabetes mellitus. J Clin Invest 1995;95:2501-9. PubMed
    3. 3057. Boden G, Chen X, Ruiz J, et al. Effects of vanadyl sulfate on carbohydrate and lipid metabolism in patients with non-insulin-dependent diabetes mellitus. Metabolism 1996;45:1130-5.
    4. 7135. Food and Nutrition Board, Institute of Medicine. Dietary Reference Intakes for Vitamin A, Vitamin K, Arsenic, Boron, Chromium, Copper, Iodine, Iron, Manganese, Molybdenum, Nickel, Silicon, Vanadium, and Zinc. Washington, DC: National Academy Press, 2002.
    5. 3020. Sitprija V, Tungsanga K, Tosukhowong P, et al. Metabolic problems in northeastern Thailand: possible role of vanadium. Mineral Electrolyte Metab 1998;19:51-6.

    Cobicistat

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

  • Kidney stones Worth acting on Additional detail

    Vanadium

    Recorded for Vanadium in the same Natural Medicines adverse-effect record shown under Kidney problems above.

    Cobicistat

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

  • An allergic reaction Worth acting on Additional detail

    Vanadium

    “Allergic reactions to vanadium metal have been reported. A 68-year-old female developed an itchy, erythematous rash, ocular pruritus, and a positive skin test to vanadium after implantation of a vanadium-containing knee prosthesis. Contact dermatitis, presenting as pruritic eczema of the hand, and a positive skin patch test to vanadium was reported in a 39-year-old male who worked with vanadium-containing tools.”

    Vanadium · Natural Medicines adverse-effect record, reported in dermatitis.

    2 sources cited
    1. 99051. Peat F, Coomber R, Rana A, Vince A. Vanadium allergy following total knee arthroplasty. BMJ Case Rep 2018;2018. pii: bcr-2017-222092. doi: 10.1136/bcr-2017-222092. PubMed
    2. 102095. Garcia-Nunez I, Algaba-Marmol MA, Suarez-Vergara M, et al. Vanadium contact dermatitis: case report and studies performed. Contact Dermatitis 2019;80(2):127-8. PubMed

    Cobicistat

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

  • Itching Additional detail

    Vanadium

    “Allergic reactions to vanadium metal have been reported. A 68-year-old female developed an itchy, erythematous rash, ocular pruritus, and a positive skin test to vanadium after implantation of a vanadium-containing knee prosthesis.”

    Vanadium · Natural Medicines adverse-effect record, reported in dermatitis.

    3 sources cited
    1. 99051. Peat F, Coomber R, Rana A, Vince A. Vanadium allergy following total knee arthroplasty. BMJ Case Rep 2018;2018. pii: bcr-2017-222092. doi: 10.1136/bcr-2017-222092. PubMed
    2. 102095. Garcia-Nunez I, Algaba-Marmol MA, Suarez-Vergara M, et al. Vanadium contact dermatitis: case report and studies performed. Contact Dermatitis 2019;80(2):127-8. PubMed
    3. 107924. Zhang W, Chen H, Zeng Q, Xu S, Xia W, Li Y. Prenatal and postnatal exposure to vanadium and the immune function of children. J Trace Elem Med Biol 2021;67:126787. PubMed

    Cobicistat

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

  • Tiredness Additional detail

    Vanadium

    “Orally, vanadium has been rarely associated with fatigue, lethargy, and focal neurological lesions, which are unrelated to dose.”

    Vanadium · Natural Medicines adverse-effect record, reported in fatigue.

    1 source cited
    1. 7135. Food and Nutrition Board, Institute of Medicine. Dietary Reference Intakes for Vitamin A, Vitamin K, Arsenic, Boron, Chromium, Copper, Iodine, Iron, Manganese, Molybdenum, Nickel, Silicon, Vanadium, and Zinc. Washington, DC: National Academy Press, 2002.

    Cobicistat

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

  • Diarrhea / Nausea Additional detail

    Vanadium

    “Orally, vanadium most commonly causes mild gastrointestinal upset. There is concern that taking doses exceeding the tolerable upper intake level (UL) of 1.8 mg per day can increase the risk of gastrointestinal side effects and possibly lead to more severe toxicity. At higher doses, vanadium frequently causes gastrointestinal effects including abdominal discomfort, diarrhea, nausea, and flatulence.”

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

    6 sources cited
    1. 7135. Food and Nutrition Board, Institute of Medicine. Dietary Reference Intakes for Vitamin A, Vitamin K, Arsenic, Boron, Chromium, Copper, Iodine, Iron, Manganese, Molybdenum, Nickel, Silicon, Vanadium, and Zinc. Washington, DC: National Academy Press, 2002.
    2. 3012. Harland BF, Harden-Williams BA. Is vanadium of human nutritional importance yet? J Am Diet Assoc 1994;94:891-4. PubMed
    3. 3055. Halberstam M, Cohen N, Shlimovich P, et al. Oral vanadyl sulfate improves insulin sensitivity in NIDDM but not in obese nondiabetic subjects. Diabetes 1996;45:659-66. PubMed
    4. 3056. Cohen N, Halberstam M, Shlimovich P, et al. Oral vanadyl sulfate improves hepatic and peripheral insulin sensitivity in patients with non-insulin-dependent diabetes mellitus. J Clin Invest 1995;95:2501-9. PubMed
    5. 3057. Boden G, Chen X, Ruiz J, et al. Effects of vanadyl sulfate on carbohydrate and lipid metabolism in patients with non-insulin-dependent diabetes mellitus. Metabolism 1996;45:1130-5.
    6. 12557. Goldfine AB, Simonson DC, Folli F, et al. Metabolic effects of sodium metavanadate in humans with insulin-dependent and noninsulin-dependent diabetes mellitus in vivo and in vitro studies. J Clin Endocrinol Metab 1995;80:3311-20. PubMed

    Cobicistat

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

  • A skin rash Additional detail

    Vanadium

    Recorded for Vanadium in the same Natural Medicines adverse-effect record shown under Kidney problems above.

    Cobicistat

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

Reported for Vanadium but not commonly for Cobicistat: raised blood pressure, stomach upset, high blood sugar and bloating or gas.

Effects for Cobicistat come from the ADVERSE REACTIONS section of its FDA label; effects for Vanadium 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.

Special populations

Vanadium in Pregnancy & Breastfeeding

Pregnancy Likely Safe

When used orally in amounts found in foods.

Pregnancy Possibly Unsafe

When used orally in medicinal amounts. Epidemiological research has found that increased urinary levels of vanadium are associated with an increased risk of both term and preterm premature rupture of membranes (PROM). When comparing tertiles of urinary vanadium levels, patients in the middle tertile had 1.66 times the risk of term PROM when compared with the lowest tertile, and those in the highest tertile had 3.75 times the risk. For preterm PROM (rupture prior to 37 weeks' gestation), those in the highest tertile had an 8.14 times increased risk when compared with those in the lowest tertile. Epidemiological research has also found that higher prenatal serum levels of vanadium are associated with impaired fetal growth, particularly in male newborns. The risk appears greatest with vanadium exposure in the second trimester.

Lactation Likely Safe

When used orally in amounts found in foods. There is insufficient reliable information available about the safety of vanadium when used in amounts greater than those typically found in foods; avoid using.

DISCLAIMER: This tool is intended for informational purposes only, and should not be interpreted as specific medical advice. Patients should consult with a qualified healthcare provider before making decisions about therapies and/or health conditions.© 2026 Therapeutic Research Center

How to take them

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

At least one FDA label for a product containing Cobicistat says to take it with food. If you take Vanadium 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 Vanadium 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 Vanadium as Part of a Dietary Supplement Product? Check It for Interactions

We hold 4,701 real supplement products containing Vanadium, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Vanadium. Even though Vanadium 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 Vanadium 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 Vanadium
Top 5%

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

29 days ago today
Medication Cobicistat
Steady interest

#1,837 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 Vanadium reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 13, 2026. The Vanadium and Cobicistat records this page draws on were last updated July 11, 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 Vanadium

What is Vanadium?

Vanadium
  • Blood sugar and diabetes support
  • Athletic performance and muscle building
  • Lowering cholesterol
  • General trace-mineral supplementation

Vanadium is a trace mineral found in tiny amounts in food, and people get plenty from a normal diet. Supplement claims for diabetes, weight, and athletic performance are not well proven, and higher doses can be toxic. Most people do not need to supplement it, and you should check with your doctor or pharmacist before using it.

Trace mineral (not a plant); supplements use vanadium salts such as vanadyl sulfate or sodium metavanadate · Capsules, tablets, often as vanadyl sulfate; sometimes in multivitamin or sports supplements

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

Vanadium: dosing

There is no established standard supplement dose for vanadium, and there is no recognized daily requirement for it as a separate supplement because the diet provides what the body needs. Studies in diabetes used high doses that are not considered safe for general use.If you choose to take a product, follow the directions on the label and do not exceed them.

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

Read the full Vanadium 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 & Vanadium

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

0Major
208Moderate
0Minor
2,621No known interaction
Moderate

208 interactions

Showing 60 of 208 moderate interactions — see all 208 on the Vanadium page.

No interaction 2,621 drugs checked — show the list
Evidence & sources

Vanadium References

The 15 references that drive our Vanadium 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. Harland BF, Harden-Williams BA. Is vanadium of human nutritional importance yet? J Am Diet Assoc 1994;94:891-4. PubMed
  2. Sitprija V, Tungsanga K, Tosukhowong P, et al. Metabolic problems in northeastern Thailand: possible role of vanadium. Mineral Electrolyte Metab 1998;19:51-6.
  3. Funakoshi T, Shimada H, Kojima S, et al. Anticoagulant action of vanadate. Chem Pharmaceut Bull 1992;40:174-6. PubMed
  4. Halberstam M, Cohen N, Shlimovich P, et al. Oral vanadyl sulfate improves insulin sensitivity in NIDDM but not in obese nondiabetic subjects. Diabetes 1996;45:659-66. PubMed
  5. Cohen N, Halberstam M, Shlimovich P, et al. Oral vanadyl sulfate improves hepatic and peripheral insulin sensitivity in patients with non-insulin-dependent diabetes mellitus. J Clin Invest 1995;95:2501-9. PubMed
  6. Boden G, Chen X, Ruiz J, et al. Effects of vanadyl sulfate on carbohydrate and lipid metabolism in patients with non-insulin-dependent diabetes mellitus. Metabolism 1996;45:1130-5.
  7. Food and Nutrition Board, Institute of Medicine. Dietary Reference Intakes for Vitamin A, Vitamin K, Arsenic, Boron, Chromium, Copper, Iodine, Iron, Manganese, Molybdenum, Nickel, Silicon, Vanadium, and Zinc. Washington, DC: National Academy Press, 2002.
  8. Goldfine AB, Simonson DC, Folli F, et al. Metabolic effects of sodium metavanadate in humans with insulin-dependent and noninsulin-dependent diabetes mellitus in vivo and in vitro studies. J Clin Endocrinol Metab 1995;80:3311-20. PubMed
  9. Cusi K, Cukier S, DeFronzo RA, et al. Vanadyl sulfate improves hepatic and muscle insulin sensitivity in type 2 diabetes. J Clin Endocrinol Metab 2001;86:1410-7.
  10. Peat F, Coomber R, Rana A, Vince A. Vanadium allergy following total knee arthroplasty. BMJ Case Rep 2018;2018. pii: bcr-2017-222092. doi: 10.1136/bcr-2017-222092. PubMed
  11. Jin S, Xia W, Jiang Y, et al. Urinary vanadium concentration in relation to premature rupture of membranes: A birth cohort study. Chemosphere 2018;210:1035-41. doi: 10.1016/j.chemosphere.2018.07.110. PubMed
  12. Garcia-Nunez I, Algaba-Marmol MA, Suarez-Vergara M, et al. Vanadium contact dermatitis: case report and studies performed. Contact Dermatitis 2019;80(2):127-8. PubMed
  13. Zhou Y, Zhu Q, Ma W, et al. Prenatal vanadium exposure, cytokine expression, and fetal growth: a gender-specific analysis in Shanghai MCPC study. Sci Total Environ 2019;685:1152-9. PubMed
  14. Jiang S, Zhou S, Liu H, et al. Concentrations of vanadium in urine with hypertension prevalence and blood pressure levels. Ecotoxicol Environ Saf 2021;213:112028. PubMed
  15. Zhang W, Chen H, Zeng Q, Xu S, Xia W, Li Y. Prenatal and postnatal exposure to vanadium and the immune function of children. J Trace Elem Med Biol 2021;67:126787. PubMed

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 Vanadium and Cobicistat Together: Common Questions

Is it safe to take Vanadium with Cobicistat?
We do not list a known interaction between Vanadium 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 Vanadium and Cobicistat have any of the same side effects?
Yes — our sources link each of them separately to 8 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 Vanadium 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 Vanadium 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 Vanadium and Cobicistat combination checked?
Interactions in our licensed database are recorded against drug classes. Cobicistat is filed under 2 classifications, and Vanadium has documented interactions with 2 drug classes — 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 Vanadium interact with any other medications?
Yes. Vanadium has 208 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 — Vanadium 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

Still Have a Question About Cobicistat and Vanadium?

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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.