Drug & supplement interaction

Gum Arabic + Sotorasib

Sotorasib brand name: Lumakras.

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

Gum Arabic has a moderate interaction with Sotorasib. Theoretically, gum arabic can alter the absorption of oral drugs due to its fiber content.

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

Gum Arabic and Sotorasib

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

Moderate

ORAL DRUGS

Why this applies to Sotorasib

Sotorasib falls under ORAL DRUGS — the group Gum Arabic interacts with.

Theoretically, gum arabic can alter the absorption of oral drugs due to its fiber content.
Gum arabic has been used as a suspending osmotic agent in drug formulations. It might improve bioavailability of water-insoluble drugs like naproxen, but reduce absorption of polar drugs like amoxicillin. To avoid changes in absorption, take gum arabic 30-60 minutes after oral medications.
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 gist with Lumakras (sotorasib) and gum arabic. Gum arabic is a soluble fiber, and fiber can grab onto pills in your stomach and gut, which may slow or lower how much medicine your body actually absorbs. With a cancer drug like sotorasib, you really want the full, steady dose getting in, since less absorption could mean less of the cancer-fighting benefit.

Sotorasib is not a prodrug, so this isn't about activation. It's simply a timing-of-absorption concern, and honestly the evidence here is mostly theoretical. A simple fix is to separate them: take your sotorasib first, then wait at least 30 to 60 minutes before the gum arabic. Before adding any fiber supplement, please run it by your oncology pharmacist or doctor.

Contact Dr. Brian directly if you have additional questions on this interaction
References
  1. Eltayeb IB, Awad AI, Elderbi MA, Shadad SA. Effect of gum arabic on the absorption of a single oral dose of amoxicillin in healthy Sudanese volunteers. J Antimicrob Chemother 2004;54:577-8. PubMed
  2. Beneke CE, Viljoen AM, Hamman JH. Polymeric plant-derived excipients in drug delivery. Molecules. 2009;14(7):2602-20. PubMed

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

Gum Arabic Also Interacts With Other Medications

Gum Arabic has 2,021 moderate known drug interactions in our database — the Sotorasib one above is one of them. If you take anything else, check it against the full list below.

Moderate 2,021 No known interaction 809 (incl. Sotorasib)
Taking anything else?

Check Another of Your Medications Against Gum Arabic

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

Everything else you take

See Every Supplement That Interacts With Sotorasib

This page covers Gum Arabic only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Sotorasib page lists 180 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Beer (major), Grapefruit (major), Siberian Cocklebur (major) and St. John's Wort (major).

By severity: 6 major · 137 moderate · 37 minor.

From our pharmacist’s overview on the Sotorasib page

“Grapefruit is the first thing I would drop while on sotorasib (Lumakras), a targeted lung cancer pill cleared by the CYP3A4 enzyme. Grapefruit blocks that enzyme and can push sotorasib levels up; St.”

Reviewed by 2 · Jul 18, 2026

Open the Sotorasib interaction page

One more smart check

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

We hold 3 real supplement products containing Gum Arabic, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Gum Arabic. Your product may carry other ingredients that interact with Sotorasib too, on top of Gum Arabic — 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 Gum Arabic and Sotorasib 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 Gum Arabic
Top half

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

29 days ago today
Medication Sotorasib
Top half

#816 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 Gum Arabic

What is Gum Arabic?

Gum Arabic
  • Digestive and gut health
  • Source of soluble fiber
  • Constipation or bowel regularity
  • Prebiotic support
  • Cholesterol support
  • Blood sugar support

Gum arabic is a soluble dietary fiber from the acacia tree that is widely used as a safe food additive and is sometimes taken as a supplement for digestive health and as a prebiotic. Early studies suggest possible benefits for gut bacteria, cholesterol, and blood sugar, but the evidence is limited, and high doses can cause gas and bloating. Talk to your pharmacist or doctor before using it as a supplement.

Read the full Gum Arabic monograph & all interactions
Medication

About Sotorasib

What Is Sotorasib Used For?

Brand name: Lumakras

Lumakras is used to treat adults with KRAS G12C-mutated locally advanced or metastatic non-small cell lung cancer (NSCLC) who have already received at least one prior cancer treatment. This use was approved under the FDA's accelerated approval pathway based on tumor response rates, and continued approval may depend on results from confirmatory trials.

Lumakras is also used in combination with panitumumab to treat adults with KRAS G12C-mutated metastatic colorectal cancer (mCRC) who have previously received certain chemotherapy regimens. In both cases, patients must first be confirmed to carry the KRAS G12C mutation using an FDA-approved test.

See full Sotorasib drug information
Keep checking

Other Drugs & Gum Arabic

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

0Major
2,021Moderate
0Minor
808No known interaction
2,021 Moderate 808 No interaction
Moderate

2,021 interactions

Showing 60 of 2,021 moderate interactions — see all 2,021 on the Gum Arabic page.

No interaction 808 drugs checked — show the list

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

Showing the 60 most looked-up of 808 medications checked with no known interaction — see the full Gum Arabic list.

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

Can you take Gum Arabic with Sotorasib?
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 Gum Arabic and Sotorasib 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 Sotorasib and Gum Arabic?

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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.