Drug & supplement interaction

Aegeline + Fostemsavir Tromethamine

Fostemsavir Tromethamine brand name: Rukobia.

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

Aegeline has a minor interaction with Fostemsavir Tromethamine. Aegeline inhibits cytochrome P450 3A4 (CYP3A4) activity in vitro.

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

Aegeline and Fostemsavir Tromethamine

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

Minor

CYTOCHROME P450 3A4 (CYP3A4) SUBSTRATES

Why this applies to Fostemsavir Tromethamine

Fostemsavir Tromethamine falls under CYTOCHROME P450 3A4 (CYP3A4) SUBSTRATES — the group Aegeline interacts with.

Aegeline inhibits cytochrome P450 3A4 (CYP3A4) activity in vitro. So far, this interaction has not been reported in humans. Theoretically, aegeline may increase levels of drugs metabolized by CYP3A4. Some drugs metabolized by CYP3A4 include lovastatin (Mevacor), ketoconazole (Nizoral), itraconazole (Sporanox), fexofenadine (Allegra), triazolam (Halcion), and numerous others. Use aegeline cautiously or avoid in patients taking these drugs.
Severity Minor Likelihood Possible Evidence D

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 short version: your body uses an enzyme called CYP3A4 to help break down fostemsavir (Rukobia). In lab dishes, aegeline appears to slow that same enzyme down. If that held true in people, fostemsavir could clear a bit more slowly and build up, which might mean a stronger chance of side effects like nausea, headache, or changes in your heart's rhythm (QT prolongation).

That said, this is only a theoretical concern from test-tube research, never confirmed in humans, and it's rated minor. The bigger issue is aegeline itself, since it has been linked to serious liver injury and regulators have warned against it. I'd steer clear of it entirely, especially with an important HIV medicine on board. Please loop in your pharmacist or doctor before adding any supplement.

Contact Dr. Brian directly if you have additional questions on this interaction
References
  1. Manda VK, Avula B, Chittiboyina AG, Khan IA, Walker LA, Khan SI. Inhibition of CYP3A4 and CYP1A2 by Aegle marmelos and its constituents. Xenobiotica. 2016;46(2):117-25.

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

Aegeline Also Interacts With Other Medications

Aegeline has 642 minor known drug interactions in our database — the Fostemsavir Tromethamine one above is one of them. If you take anything else, check it against the full list below.

Minor 642 No known interaction 2,188 (incl. Fostemsavir Tromethamine)
Taking anything else?

Check Another of Your Medications Against Aegeline

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

Everything else you take

See Every Supplement That Interacts With Fostemsavir Tromethamine

This page covers Aegeline only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Fostemsavir Tromethamine page lists 146 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), American Hellebore (major), Arsenic (major), Cesium (major) and Ephedra (major).

By severity: 8 major · 98 moderate · 40 minor.

Open the Fostemsavir Tromethamine interaction page

One more smart check

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

We hold 7 real supplement products containing Aegeline, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Aegeline. Your product may carry other ingredients that interact with Fostemsavir Tromethamine too, on top of Aegeline — 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 Aegeline and Fostemsavir Tromethamine 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 Aegeline
Steady interest

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

29 days ago today
Medication Fostemsavir Tromethamine
Top 25%

#366 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 Aegeline

What is Aegeline?

  • Weight loss
  • Fat burning / metabolism support
  • Sports and bodybuilding supplements
  • General 'energy' products

Aegeline is a compound originally identified in the bael tree (Aegle marmelos) that gained attention because it was added to some weight-loss and workout supplements. It is best known for being linked to serious liver injury in a product called OxyELITE Pro, and U.S. regulators warned against products containing it. There is no good evidence it safely helps with weight loss, and it should generally be avoided.

Read the full Aegeline monograph & all interactions
Medication

About Fostemsavir

What Is Fostemsavir Used For?

Brand name: Rukobia

Fostemsavir treats HIV-1 infection in adults. It is used with other HIV medicines (antiretrovirals).

It is meant for heavily treatment-experienced adults with multidrug-resistant HIV-1 whose current regimen is failing. That can be because of resistance, intolerance, or safety concerns. Rukobia is the product supported here.

See full Fostemsavir drug information
Keep checking

Other Drugs & Aegeline

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

0Major
0Moderate
642Minor
2,187No known interaction
642 Minor 2,187 No interaction
Minor

642 interactions

Showing 60 of 642 minor interactions — see all 642 on the Aegeline page.

No interaction 2,187 drugs checked — show the list

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

Showing the 60 most looked-up of 2,187 medications checked with no known interaction — see the full Aegeline list.

See the full Aegeline interactions page
See every supplement checked against Fostemsavir Tromethamine, 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
Aegeline monograph › Uses, safety, and every drug interaction in one place Fostemsavir Tromethamine supplement interactions › Every supplement checked against Fostemsavir Tromethamine, ranked by severity Fostemsavir 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 Aegeline and Fostemsavir Tromethamine Together: Common Questions

Can you take Aegeline with Fostemsavir Tromethamine?
There is only a minor interaction, which is usually not serious. Read the full details on this page and confirm with your pharmacist before combining them.
How serious is the Aegeline and Fostemsavir Tromethamine interaction?
We rate it Minor. This interaction is generally not clinically significant, but it remains worth noting and discussing with your pharmacist.

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

Still Have a Question About Fostemsavir Tromethamine and Aegeline?

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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.