Whey Protein + Rezafungin
Rezafungin brand name: Rezzayo.
We found no known interaction between Whey Protein and Rezafungin 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.
Whey Protein and Rezafungin
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 Rezafungin and Whey Protein 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.
Whey Protein safety at a glance
Safety guidance is general; always confirm with your pharmacist or doctor for your situation.
Why No Interaction Is Listed for Rezafungin
Interactions in our licensed database are recorded against drug classes, not just single drug names. Rezafungin is filed under a single classification — hepatotoxic drugs. Whey Protein has documented interactions with 4 drug classes — the most serious being levodopa (major), bisphosphonates (moderate) and quinolone antibiotics (moderate) — and none of Rezafungin’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.
Whey Protein Does Interact With Other Medications
Whey Protein has 5 major, 48 moderate known drug interactions in our database — Rezafungin isn’t one of them. If you take anything else, check it against the full list below.
Check Another of Your Medications Against Whey Protein
We haven’t checked that one against Whey Protein yet — ask our pharmacists directly.
Covers the 2,830 medications we’ve checked against Whey Protein. Pick one to open its full report.
Questions About Whey Protein or Rezafungin
These are real questions from readers, answered by the pharmacists at HelloPharmacist — written by a person, not generated from a database. Each one covers Whey Protein or Rezafungin, 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.
See Every Supplement That Interacts With Rezafungin
This page covers Whey Protein only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Rezafungin page lists 38 supplements it has a documented interaction with, worst first, each one explained.
The most serious there right now: Beer (major), Siberian Cocklebur (major), Wine (major), Ashwagandha (moderate) and Black Cohosh (moderate).
By severity: 3 major · 35 moderate.
From our pharmacist’s overview on the Rezafungin page
“Rezafungin (Rezzayo) is an intravenous antifungal used against serious, often life-threatening Candida infections, and every one of its 38 flagged supplements shares a single concern, added stress on the liver. Three interactions rate major, and two of those are alcohol in the form of beer and wine, alongside the herb Siberian cocklebu…”
Reviewed by 2 · Jul 18, 2026
Taking Whey Protein as Part of a Dietary Supplement Product? Check It for Interactions
We hold 1,276 real supplement products containing Whey Protein, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Whey Protein. Even though Whey Protein itself has no known interaction with Rezafungin, another ingredient on your label might. Find your product and we’ll check every ingredient on its label:
Where Whey Protein and Rezafungin 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.
#122 of 1,452 supplements looked up here in the last 7 days
#917 of 2,830 medications looked up here in the last 7 days
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 Whey Protein reference on this page ↓
- Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The Whey Protein and Rezafungin 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.
About Whey Protein
What is Whey Protein?
- Muscle building and recovery
- Increasing daily protein intake
- Weight management
- Sports nutrition
- Meal replacement
Whey protein is a high-quality, complete protein made from cow's milk that can help people meet protein needs and support muscle growth when combined with exercise. It is generally safe for most healthy adults, but people with milk allergies should avoid it, and those with kidney disease or who are lactose intolerant should use caution.
Liquid whey fraction of cow's milk · Powders, shakes, ready-to-drink beverages, protein bars
An interaction check asks whether these two react with each other — it does not ask whether Whey Protein is a good idea for someone in your situation. Here is what our Whey Protein record says about it on its own.
Whey Protein: dosing
There is no single official dose of whey protein, because the right amount depends on your body weight, activity level, and how much protein you already get from food.Most products provide about 20 to 30 grams of protein per scoop, and the label will give a suggested serving. Spreading protein throughout the day, rather than taking it all at once, may be easier on your stomach.
From our Whey Protein monograph — the full record covers uses, side effects and every documented interaction.
About Rezafungin Injection
What Is Rezafungin Injection Used For?
Brand name: Rezzayo
Rezzayo (rezafungin injection) is used to treat candidemia (a Candida yeast infection in the bloodstream) and invasive candidiasis (a serious Candida infection that has spread into the body's tissues or organs). It is approved for adults and for adolescents 12 years of age and older who have limited or no other treatment options.
Important note: Rezzayo has not been studied in Candida infections of the heart (endocarditis), bones (osteomyelitis), or the brain and spinal cord (meningitis), so it is not used for those conditions.
Most-Reported Side Effects for Rezafungin
From FAERS, the FDA’s public side-effect reporting system (0 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.
Other Drugs & Whey Protein
Browse every other medication we’ve checked against Whey Protein — both the ones with a known interaction and the ones without. Select any drug for the full detail.
No drugs match “”.
5 interactions
48 interactions
- Doxycycline ›
- Minocycline ›
- Tetracycline ›
- Ciprofloxacin ›
- Ofloxacin ›
- Doxycycline Hyclate ›
- Levofloxacin ›
- Zoledronic Acid ›
- Alendronate ›
- Etidronate Disodium ›
- Gatifloxacin ›
- Ibandronate ›
- Minocycline Hydrochloride ›
- Norfloxacin ›
- Retapamulin ›
- Risedronate Sodium ›
- Trovafloxacin ›
- Chlortetracycline ›
- Cinoxacin ›
- Clinafloxacin ›
- Demeclocycline ›
- Doripenem ›
- Doxycycline Monohydrate ›
- Doxycyline ›
- Enoxacin ›
- Eravacycline ›
- Finafloxacin ›
- Gemifloxacin ›
- Grepafloxacin ›
- Levofloxacin (ophthalmic) ›
- Lomefloxacin ›
- Moxifloxacin ›
- Nalidixic Acid ›
- Omadacycline (iv) ›
- Omadacycline (oral) ›
- Oxytetracycline ›
- Ozenoxacin ›
- Pamidronate ›
- Risedronate ›
- Sparfloxacin ›
- Tigecycline ›
- Tiludronate Disodium ›
- Alendronate Sodium ›
- Alendronate Sodium, Cholecalciferol ›
- Amphotericin, Tetracycline ›
- Bismuth Subsalicylate, Metronidazole, Tetracycline ›
- Metronidazole, Tetracyline, Bismuth Subcitrate Potassium ›
- Oxytetracycline, Phenazopyridine, Sulfamethizole ›
No interaction 2,776 drugs checked — show the list
We also checked Whey Protein against these medications and found no known interaction in our sources. Open any page to confirm.
- Apixaban ›
- Levothyroxine ›
- Amlodipine ›
- Methylphenidate ›
- Warfarin ›
- Sertraline ›
- Testosterone ›
- Losartan Potassium ›
- Ivermectin ›
- Abemaciclib ›
- Aspirin ›
- Acetaminophen ›
- Metoprolol ›
- Rosuvastatin ›
- Rivaroxaban ›
- Escitalopram ›
- Clopidogrel ›
- Atorvastatin ›
- Tadalafil ›
- Docusate ›
- Tirzepatide ›
- Ibuprofen ›
- Methamphetamine ›
- Hydroxyurea ›
- Valacyclovir ›
- Warfarin Sodium ›
- Sumatriptan ›
- Semaglutide ›
- Prednisone ›
- Lisdexamfetamine ›
- Propranolol ›
- Metformin ›
- Amitriptyline ›
- Amoxicillin ›
- Lisinopril ›
- Isotretinoin ›
- Amlodipine Besylate ›
- Methotrexate ›
- Bendamustine ›
- Bupropion ›
- Amphetamine ›
- Fluoxetine ›
- Acyclovir ›
- Azithromycin ›
- Lamotrigine ›
- Pregabalin ›
- Dextroamphetamine ›
- Gabapentin ›
- Acetaminophen, Codeine ›
- Quetiapine ›
- Clonazepam ›
- Levothyroxine, Liothyronine ›
- Naproxen ›
- Omeprazole ›
- Letrozole ›
- Methylene Blue ›
- Duloxetine ›
- Buspirone ›
- Citalopram ›
- Bisoprolol ›
Showing the 60 most looked-up of 2,776 medications checked with no known interaction — see the full Whey Protein list.
Whey Protein References
The 25 references that drive our Whey Protein 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.
- Martindale W. Martindale the Extra Pharmacopoeia. Pharmaceutical Press, 1999.
- Maton PN, Burton ME. Antacids revisited: a review of their clinical pharmacology and recommended therapeutic use. Drugs 1999;57:855-70.
- Bell SJ. Whey protein concentrates with and without immunoglobulins: a review. J Med Food 2000;3:1-13. PubMed
- Nutt JG, Woodward WR, Hammerstad JP, et al. The "on-off" phenomenon in Parkinson's disease. Relation to levodopa absorption and transport. N Engl J Med 1984;310:483-8. PubMed
- Baruzzi A, Contin M, Riva R, et al. Influence of meal ingestion time on pharmacokinetics of orally administered levodopa in parkinsonian patients. Clin Neuropharmacol 1987;10:527-37. PubMed
- Juncos JL, Fabbrini G, Mouradian MM, et al. Dietary influences on the antiparkinsonian response to levodopa. Arch Neurol 1987;44:1003-5. PubMed
- Eriksson T, Granerus AK, Linde A, et al. "On-off" phenomenon in Parkinson's disease: relationship between dopa and other large neutral amino acids in plasma. Neurology 1988;38:1245-8. PubMed
- Semla TP, Beizer JL, Higbee MD. Geriatric Dosage Handbook. 4th ed. Hudson, OH: Lexicomp, 1998.
- Pletz MW, Petzold P, Allen A, et al. Effect of calcium carbonate on bioavailability of orally administered gemifloxacin. Antimicrob Agents Chemother 2003;47:2158-60.. PubMed
- Peters ML, Leonard M, Licata AA. Role of alendronate and risedronate in preventing and treating osteoporosis. Cleve Clin J Med 2001;68:945-51. PubMed
- Micke, P., Beeh, K. M., and Buhl, R. Effects of long-term supplementation with whey proteins on plasma glutathione levels of HIV-infected patients. Eur.J Nutr 2002;41(1):12-18. PubMed
- Chitapanarux, T., Tienboon, P., Pojchamarnwiputh, S., and Leelarungrayub, D. Open-labeled pilot study of cysteine-rich whey protein isolate supplementation for nonalcoholic steatohepatitis patients. J Gastroenterol.Hepatol. 2009;24(6):1045-1050. PubMed
- Sataloff, R. T., Bittermann, T., Marks, L., Lurie, D., and Hawkshaw, M. The effects of glutathione enhancement on sensorineural hearing loss. Ear Nose Throat J 2010;89(9):422-433.
- Zhu, K., Meng, X., Kerr, D. A., Devine, A., Solah, V., Binns, C. W., and Prince, R. L. The effects of a two-year randomized, controlled trial of whey protein supplementation on bone structure, IGF-1, and urinary calcium excretion in older postmenopausal
- Bjorkman, M. P., Pilvi, T. K., Kekkonen, R. A., Korpela, R., and Tilvis, R. S. Similar effects of leucine rich and regular dairy products on muscle mass and functions of older polymyalgia rheumatica patients: a randomized crossover trial. J Nutr Health A
- Brun, A. C., Stordal, K., Johannesdottir, G. B., Bentsen, B. S., and Medhus, A. W. The effect of protein composition in liquid meals on gastric emptying rate in children with cerebral palsy. Clin.Nutr 2012;31(1):108-112. PubMed
- Gouni-Berthold, I., Schulte, D. M., Krone, W., Lapointe, J. F., Lemieux, P., Predel, H. G., and Berthold, H. K. The whey fermentation product malleable protein matrix decreases TAG concentrations in patients with the metabolic syndrome: a randomised plac
- Errichiello, L., Pezzella, M., Santulli, L., Striano, S., Zara, F., Minetti, C., Mainardi, P., and Striano, P. A proof-of-concept trial of the whey protein alfa-lactalbumin in chronic cortical myoclonus. Mov Disord. 2011;26(14):2573-2575. PubMed
- Carcillo, J. A., Dean, J. M., Holubkov, R., Berger, J., Meert, K. L., Anand, K. J., Zimmerman, J., Newth, C. J., Harrison, R., Burr, J., Willson, D. F., and Nicholson, C. The randomized comparative pediatric critical illness stress-induced immune suppres
- Chungchunlam, S. M., Moughan, P. J., Henare, S. J., and Ganesh, S. Effect of time of consumption of preloads on measures of satiety in healthy normal weight women. Appetite 2012;59(2):281-288. PubMed
- Rencuzogullari I, Börekçi A, Karakoyun S, et al. Coronary thrombosis in three coronary arteries due to whey protein. Am J Emerg Med. 2017;35(4):664.e3-664.e4. PubMed
- Silverberg NB. Whey protein precipitating moderate to severe acne flares in 5 teenaged athletes. Case Reports Cutis. 2012;90(2):70-2.
- Simonart T. Acne and whey protein supplementation among bodybuilders. Dermatology. 2012;225(3):256-8. PubMed
- Pontes TC, Costa Fernandes Filho GM, Pereira Trindade AS, Sobral Filho JF. Incidence of acne vulgaris in young adult users of protein-calorie supplements in the city of João Pessoa-PB. An Bras Dermatol. 2013;88(6):907-12.
- Adebamowo CA, Spiegelman D, Berkey CS, et al. Milk consumption and acne in teenaged boys. J Am Acad Dermatol. 2008 May;58(5):787-93. 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.
Taking Whey Protein and Rezafungin Together: Common Questions
Is it safe to take Whey Protein with Rezafungin?
Do Whey Protein and Rezafungin have any of the same side effects?
How was the Whey Protein and Rezafungin combination checked?
Does Whey Protein interact with any other medications?
Does Rezafungin interact with any supplements?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
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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.