Drug & supplement interaction

Elderberry + Sirolimus (albumin bound)

Sirolimus (albumin bound) brand name: Fyarro.

Moderate Interaction
Medically reviewed by · Updated September 2026
The bottom line Moderate

Elderberry has a moderate interaction with Sirolimus (albumin bound). Theoretically, elderberry might interfere with immunosuppressant therapy due to its immunostimulant activity.

Read the full interaction report
SeverityModerate
LikelihoodPossible
EvidenceB
What do Severity, Likelihood & Evidence mean?
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Interaction report

Elderberry and Sirolimus (albumin bound)

Here is the interaction we found between these two, with the evidence behind it.

Moderate

IMMUNOSUPPRESSANTS

Why this applies to Sirolimus (albumin bound)

Sirolimus (albumin bound) falls under IMMUNOSUPPRESSANTS — the group Elderberry interacts with.

Theoretically, elderberry might interfere with immunosuppressant therapy due to its immunostimulant activity.
Elderberry has immunostimulant activity, increasing the production of cytokines, including interleukin and tumor necrosis factor.
Severity Moderate Likelihood Possible Evidence B

Interaction has been documented in animal or in lab research, or the interaction has been documented in humans but is limited to case reports or conflicting clinical research exists.

Dr. Brian Staiger, PharmD, BCPS
Dr. Brian Staiger explains PharmD, Clinical Pharmacist

Here's the thinking behind this pairing. Your sirolimus (Fyarro) works by quieting down certain growth and immune signals to help slow this tumor. Elderberry seems to do a bit of the opposite in lab and animal studies, nudging the immune system to make more inflammatory messengers like interleukins and tumor necrosis factor. The worry is that elderberry could theoretically push against the calming effect your medicine is meant to provide.

I'll be honest with you: this is mostly a theoretical concern, not something proven in people taking sirolimus, so I don't want you to panic. Still, since this is serious cancer treatment, it's worth a quick chat with your oncologist or pharmacist before adding elderberry. Please don't start or stop anything on your own.

Contact Dr. Brian directly if you have additional questions on this interaction
References
  1. Barak V, Halperin T, Kalickman I. The effect of Sambucol, a black elderberry-based, natural product, on the production of human cytokines: I. Inflammatory cytokines. Eur Cytokine Netw 2001;12:290-6..

What These Ratings Mean

Every interaction above is graded three ways — here’s the key to each label.

Severity how clinically significant the interaction is
Major

Clinically significant. Avoid the combination, or use only under close professional supervision.

Moderate

Usually worth avoiding or managing — may need monitoring, a dose change, or timing apart.

Minor

Generally not serious. Be aware of it and mention it to your pharmacist.

Likelihood how strong the evidence is that the interaction actually happens in people
  • LikelyWell-controlled human studies have demonstrated the likely existence of this interaction.
  • ProbableInteraction has not been documented in well-controlled studies, however, the interaction has been demonstrated in some small human studies or in controlled animal studies in conjunction with multiple case reports.
  • PossibleInteraction has been documented in animal or in lab research, or the interaction has been documented in humans but is limited to case reports or conflicting clinical research exists.
  • UnlikelyInteraction has been demonstrated in animal or in lab research but has been shown not to occur in humans.
Evidence the quality of the studies behind the rating (graded A–D)
  • AHigh-quality meta-analysis (quantitative systematic review).
  • BCase-control study.
  • CConsensus.
  • DAnecdotal evidence.

These ratings are for information only. Never start, stop, or otherwise change your therapy before speaking with your provider.

Keep it in perspective

Elderberry Also Interacts With Other Medications

Elderberry has 120 moderate known drug interactions in our database — the Sirolimus (albumin bound) one above is one of them. If you take anything else, check it against the full list below.

Moderate 120 No known interaction 2,710 (incl. Sirolimus (albumin bound))
Taking anything else?

Check Another of Your Medications Against Elderberry

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

From our Q&A

Questions About Elderberry or Sirolimus (albumin bound)

These are real questions from readers, answered by the pharmacists at HelloPharmacist — written by a person, not generated from a database. Each one covers Elderberry or Sirolimus (albumin bound), 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 Sirolimus (albumin bound)

This page covers Elderberry only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Sirolimus (albumin bound) page lists 171 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Grapefruit (major), St. John's Wort (major), Acacia Rigidula (moderate), Active Hexose Correlated Compound (ahcc) (moderate) and Adrafinil (moderate).

By severity: 2 major · 142 moderate · 27 minor.

From our pharmacist’s overview on the Sirolimus (albumin bound) page

“Fyarro, the albumin-bound form of sirolimus used to treat advanced malignant PEComa, a rare cancer, is a medication I would guard carefully from supplement interference, and the 171 ingredients on this page show why. Most of them (121 through the CYP3A4 enzyme, 37 through the P-glycoprotein transporter) can shift how much sirolimus act…”

Reviewed by 2 · Jul 18, 2026

Open the Sirolimus (albumin bound) interaction page

One more smart check

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

We hold 226 real supplement products containing Elderberry, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Elderberry. Your product may carry other ingredients that interact with Sirolimus (albumin bound) too, on top of Elderberry — and those would not show on this page. Find your product and we’ll check every ingredient on its label:

How much people look this up

Where Elderberry and Sirolimus (albumin bound) 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 Elderberry
Top 25%

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

29 days ago today
Medication Sirolimus (albumin bound)
Top 10%

#281 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.

Supplement

About Elderberry

What is Elderberry?

Elderberry
  • Colds
  • Flu (influenza)
  • Other respiratory infections
  • Immune support
  • Sinus and upper respiratory symptoms

Elderberry is a popular herbal supplement, mainly taken to help with colds and flu. Some small studies suggest it may modestly shorten cold or flu symptoms, but the evidence is limited and not conclusive. Cooked berries and properly prepared products are generally well tolerated, but raw or unripe parts can cause nausea and should be avoided.

Read the full Elderberry monograph & all interactions
Medication

About Sirolimus (with albumin) Injection

What Is Sirolimus (with albumin) Injection Used For?

Brand name: Fyarro

Fyarro (sirolimus protein-bound particles for injectable suspension) is approved to treat adults with locally advanced unresectable (cannot be surgically removed) or metastatic (spread to other parts of the body) malignant perivascular epithelioid cell tumor, known as PEComa. This is a rare type of soft-tissue tumor.

See full Sirolimus (with albumin) Injection drug information
Keep checking

Other Drugs & Elderberry

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

0Major
120Moderate
0Minor
2,709No known interaction
120 Moderate 2,709 No interaction
Moderate

120 interactions

Showing 60 of 120 moderate interactions — see all 120 on the Elderberry page.

No interaction 2,709 drugs checked — show the list

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

Showing the 60 most looked-up of 2,709 medications checked with no known interaction — see the full Elderberry list.

See the full Elderberry interactions page
See every supplement checked against Sirolimus (albumin bound), ranked by severity
Sources

Sources & How We Checked

Interaction details are evidence-graded and sourced from the Natural Medicines database. The medication overview comes from MedlinePlus.

Content is written and reviewed by licensed HelloPharmacist pharmacists. See our data sources and editorial standards for how this information is built and checked.

Parts of this content are provided by the Therapeutic Research Center, LLC.

DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.

© 2021 Therapeutic Research Center, LLC

Keep exploring
Elderberry monograph › Uses, safety, and every drug interaction in one place Sirolimus (albumin bound) supplement interactions › Every supplement checked against Sirolimus (albumin bound), ranked by severity Sirolimus (with albumin) Injection drug information › The full plain-English guide to this medication Supplement interaction checker › Check any supplement or product against your medications Browse medications A–Z › Every drug we've checked against herbs & supplements Ask a pharmacist › Free, personal answer from our licensed team
Pharmacist Counseling Corner

Taking Elderberry and Sirolimus (albumin bound) Together: Common Questions

Can you take Elderberry with Sirolimus (albumin bound)?
There is a moderate interaction, so it may be acceptable with monitoring or timing changes — but check with your pharmacist first. Read the full details on this page and confirm with your pharmacist before combining them.
How serious is the Elderberry and Sirolimus (albumin bound) interaction?
We rate it Moderate. This combination may require monitoring, a dose adjustment, or separating the times you take each one. Consult your pharmacist before using them together.

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

Still Have a Question About Sirolimus (albumin bound) and Elderberry?

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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.