Drug & supplement interaction

Galbanum + Efavirenz

Efavirenz brand name: Sustiva.

No Known Interaction
Medically reviewed by · Updated June 2026 · Pair last verified Sep 20, 2026
The bottom line No known interaction

We found no known interaction between Galbanum and Efavirenz 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.

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Interaction report

Galbanum and Efavirenz

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 Efavirenz and Galbanum 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.

Galbanum safety at a glance

Galbanum overall Use caution Limited safety data exist, and essential oils can irritate skin or cause reactions if used incorrectly.
Pregnancy Avoid Not enough safety information is available, and some Ferula species are traditionally avoided in pregnancy.
Breastfeeding Avoid There is no reliable safety data, so it is best avoided while breastfeeding.

Safety guidance is general; always confirm with your pharmacist or doctor for your situation.

Still wondering about combining Efavirenz and Galbanum? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
How we checked

Why No Interaction Is Listed for Efavirenz

Interactions in our licensed database are recorded against drug classes, not just single drug names. Efavirenz is filed under 8 classifications — including non-nucleoside reverse transcriptase inhibitors (nnrtis), cytochrome p450 2c19 (cyp2c19) inhibitors, cytochrome p450 2c9 (cyp2c9) inhibitors. Galbanum has documented interactions with 1 drug class — the most serious being antidiabetes drugs (moderate) — and none of Efavirenz’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

Galbanum Does Interact With Other Medications

Galbanum has 86 moderate known drug interactions in our database — Efavirenz isn’t one of them. If you take anything else, check it against the full list below.

Moderate 86 No known interaction 2,744 (incl. Efavirenz)
Taking anything else?

Check Another of Your Medications Against Galbanum

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

What to actually watch for

What Efavirenz’s Own FDA Label Lists

This is not an interaction — none of it involves Galbanum. These are the most notable effects listed in the ADVERSE REACTIONS section of Efavirenz’s own FDA label, for the medication by itself. Knowing the drug’s own list makes it easier to work out the likely cause if something new turns up while you take both. One of them is worth acting on rather than waiting out — marked below.

  • Liver problems Worth acting on
  • Vivid dreams or nightmares
  • Trouble sleeping
  • Tiredness
  • Dizziness
  • A skin rash
  • Vomiting
  • Headache
  • Nausea

From the ADVERSE REACTIONS section of the FDA label for Efavirenz. Read the label on DailyMed › Galbanum’s licensed record lists no adverse effects our clinical vocabulary could match, so there is no Galbanum side to compare — that is a limit of the record, not a statement that Galbanum has no side effects.

Everything else you take

See Every Supplement That Interacts With Efavirenz

This page covers Galbanum only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Efavirenz page lists 159 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Grapefruit (major), St. John's Wort (major), Acacia Rigidula (moderate) and Adrafinil (moderate).

By severity: 3 major · 117 moderate · 39 minor.

From our pharmacist’s overview on the Efavirenz page

“Efavirenz (Sustiva) is an HIV medicine, so an interaction that weakens it can cost more than a bad day; it can invite viral resistance. That makes this a list to treat with genuine care.”

Reviewed by 2 · Jul 18, 2026

Open the Efavirenz interaction page

One more smart check

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

We hold 14 real supplement products containing Galbanum, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Galbanum. Even though Galbanum itself has no known interaction with Efavirenz, 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 Galbanum and Efavirenz 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 Galbanum
Top half

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

29 days ago today
Medication Efavirenz
Top half

#936 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 Galbanum reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The Galbanum and Efavirenz records this page draws on were last updated June 22, 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 Galbanum

What is Galbanum?

  • Aromatherapy and fragrance
  • Digestive complaints
  • Coughs and chest congestion
  • Skin and wound care (traditional)
  • Antimicrobial (traditional)

Galbanum is an aromatic gum resin from a Ferula plant, used mostly in perfumes, incense, and traditional remedies. There is very little solid human research to support any medical use, so it is best thought of as a fragrance and folk remedy rather than a proven treatment. If you want to use it for health reasons, talk with your pharmacist or doctor first.

Ferula gummosa · Apiaceae · Oleo-gum-resin and essential oil from the stems and roots · Essential oil, resin, incense, perfume ingredient, tincture

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

Galbanum: dosing

There is no established or standardized medicinal dose for galbanum. It has not been studied enough in humans to set safe, effective amounts.If you choose to use a galbanum product, follow the directions on the label exactly. Essential oils should be diluted properly and are generally meant for aromatherapy or topical use, not for swallowing.

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

Read the full Galbanum monograph & all interactions
Medication

About Efavirenz

What Is Efavirenz Used For?

Brand name: Sustiva

Efavirenz is used to treat HIV-1 (human immunodeficiency virus type 1) infection. It is always used together with other antiretroviral medicines — never on its own.

It is approved for adults and for children who are at least 3 months old and weigh at least 3.5 kg (about 7.7 lbs). Both the capsule and tablet forms are approved for this use.

Most-Reported Side Effects for Efavirenz

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.

Virologic failure 960 reports
Drug resistance 742 reports
Viral mutation identified 676 reports
Pathogen resistance 641 reports
Foetal exposure during pregnancy 621 reports
See full Efavirenz drug information
Keep checking

Other Drugs & Galbanum

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

0Major
86Moderate
0Minor
2,743No known interaction
86 Moderate 2,743 No interaction
Moderate

86 interactions

Showing 60 of 86 moderate interactions — see all 86 on the Galbanum page.

No interaction 2,743 drugs checked — show the list

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

Showing the 60 most looked-up of 2,743 medications checked with no known interaction — see the full Galbanum list.

See the full Galbanum interactions page
See every supplement checked against Efavirenz, ranked by severity
Evidence & sources

Galbanum References

The 1 references that drive our Galbanum 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. Jalili-Nik M, Soukhtanloo M, Javanshir S, et al. Effects of ethanolic extract of Ferula gummosa oleo-resin in a rat model of streptozotocin-induced diabetes. Res Pharm Sci 2019;14(2):138-145. 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 Galbanum and Efavirenz Together: Common Questions

Is it safe to take Galbanum with Efavirenz?
We do not list a known interaction between Galbanum and Efavirenz. 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.
How was the Galbanum and Efavirenz combination checked?
Interactions in our licensed database are recorded against drug classes. Efavirenz is filed under 8 classifications, and Galbanum has documented interactions with 1 drug class — none of Efavirenz'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 Galbanum interact with any other medications?
Yes. Galbanum has 86 documented drug interactions in our database — Efavirenz 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 Efavirenz interact with any supplements?
Yes. Efavirenz has documented interactions with 159 supplements in our database — Galbanum is not one of them. The Efavirenz 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

Galbanum monograph Uses, safety profile, and every drug interaction in one place Efavirenz drug information The full plain-English guide to this medication Efavirenz supplement interactions Every supplement checked against Efavirenz, 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 1 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Efavirenz and Galbanum?

Our pharmacists answer your medication & supplement questions — free.

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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.