Drug & supplement interaction

Gamma-oryzanol + Cevimeline

Cevimeline brand name: Evoxac.

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 Gamma-oryzanol and Cevimeline 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

Gamma-oryzanol and Cevimeline

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 Cevimeline and Gamma-oryzanol 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.

Worth understanding: our licensed dataset holds no drug-interaction record for Gamma-oryzanol at all — not against Cevimeline, and not against any other medication we track. This verdict therefore rests on the absence of any recorded data, not on research that looked at this combination and found nothing. We cannot rule an interaction out.

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.

Gamma-oryzanol safety at a glance

Gamma-oryzanol overall Use caution Generally well tolerated in studies, but long-term safety is not well established.
Pregnancy Avoid Not enough safety information, so it is best avoided during pregnancy.
Breastfeeding Avoid No reliable safety data, so avoid while breastfeeding.

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

Still wondering about combining Cevimeline and Gamma-oryzanol? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
What to actually watch for

What Cevimeline’s Own FDA Label Lists

This is not an interaction — none of it involves Gamma-oryzanol. These are the most notable effects listed in the ADVERSE REACTIONS section of Cevimeline’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.

  • A higher chance of infection Worth acting on
  • Passing urine more often
  • Flushing
  • A stuffy or runny nose
  • Sore throat
  • Sweating
  • Joint pain mentioned in 4.4% of FDA reports for Cevimeline
  • Back pain
  • Cough
  • Anxiety or restlessness

Showing the 10 most notable of 20 label-listed effects — ranked by how unusual each one is across medicines generally, with serious effects weighted up.

From the ADVERSE REACTIONS section of the FDA label for Cevimeline. Read the label on DailyMed › Where a percentage is shown, it is the share of 2,695 voluntary FDA FAERS reports for Cevimeline that mention that effect — a reporting proportion, not an incidence rate and not evidence the drug caused it. Gamma-oryzanol’s licensed record lists no adverse effects our clinical vocabulary could match, so there is no Gamma-oryzanol side to compare — that is a limit of the record, not a statement that Gamma-oryzanol has no side effects.

Everything else you take

See Every Supplement That Interacts With Cevimeline

This page covers Gamma-oryzanol only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Cevimeline page lists 169 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), 1,3-dmaa (moderate) and Acacia Rigidula (moderate).

By severity: 3 major · 125 moderate · 41 minor.

From our pharmacist’s overview on the Cevimeline page

“Cevimeline (Evoxac) stimulates saliva flow for the dry mouth of Sjögren's syndrome, and because the liver clears it through the CYP3A4 and CYP2D6 enzyme pathways, this interaction list warrants real attention. Three of the 169 ingredients rate major, and they come first: grapefruit can raise cevimeline levels, St.”

Reviewed by 2 · Jul 18, 2026

Open the Cevimeline interaction page

One more smart check

Taking Gamma-oryzanol as Part of a Dietary Supplement Product? Check It for Interactions

We hold 272 real supplement products containing Gamma-oryzanol, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Gamma-oryzanol. Even though Gamma-oryzanol itself has no known interaction with Cevimeline, 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 Gamma-oryzanol and Cevimeline 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 Gamma-oryzanol
Top half

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

29 days ago today
Medication Cevimeline
Top half

#889 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.
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The Gamma-oryzanol and Cevimeline 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 Gamma-oryzanol

What is Gamma-oryzanol?

  • High cholesterol
  • Menopausal symptoms
  • Athletic performance and muscle building
  • Mild anxiety
  • Skin protection (topical)

Gamma-oryzanol is a mix of plant compounds taken from rice bran oil, used mainly for cholesterol, menopause symptoms, and as a sports supplement. The evidence is limited and mostly comes from small or older studies, so benefits are not well proven. It appears generally well tolerated, but talk with your pharmacist or doctor before using it.

Poaceae · Rice bran oil (derived from Oryza sativa bran) · Capsules, tablets, powder, topical creams

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

Gamma-oryzanol: dosing

There is no official or standardized dose for gamma-oryzanol. Doses used in research have varied widely, and what works for one use may not apply to another.The best approach is to follow the directions on the product label and not take more than recommended.

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

Read the full Gamma-oryzanol monograph & all interactions
Medication

About Cevimeline

What Is Cevimeline Used For?

Brand name: Evoxac

Cevimeline — available as cevimeline hydrochloride capsules and as the brand Evoxac — is used to relieve the symptoms of dry mouth in patients with Sjögren's Syndrome, an autoimmune condition that damages the glands that make saliva and tears.

Most-Reported Side Effects for Cevimeline

From FAERS, the FDA’s public side-effect reporting system (2,695 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.

Headache 176 reports
Nausea 166 reports
Diarrhea 164 reports
Fatigue 155 reports
Dyspnea 138 reports
See full Cevimeline drug information
Keep checking

Other Drugs & Gamma-oryzanol

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

0Major
0Moderate
0Minor
2,829No known interaction
2,829 No interaction
No interaction 2,829 drugs checked — show the list

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

Showing the 60 most looked-up of 2,829 medications checked with no known interaction — see the full Gamma-oryzanol list.

See the full Gamma-oryzanol interactions page
See every supplement checked against Cevimeline, ranked by severity
Sources

Sources & How We Checked

We checked Gamma-oryzanol against Cevimeline in the Natural Medicines interaction database and found no documented interaction on file. The medication overview comes from MedlinePlus, and supplement label details from the NIH Dietary Supplement Label Database.

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
Gamma-oryzanol monograph › Uses, safety, and every drug interaction in one place Cevimeline supplement interactions › Every supplement checked against Cevimeline, ranked by severity Cevimeline 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 Gamma-oryzanol and Cevimeline Together: Common Questions

Is it safe to take Gamma-oryzanol with Cevimeline?
We do not list a known interaction between Gamma-oryzanol and Cevimeline. 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.
Does Cevimeline interact with any supplements?
Yes. Cevimeline has documented interactions with 169 supplements in our database — Gamma-oryzanol is not one of them. The Cevimeline interaction page linked on this page lists every one, ranked by severity.

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

Still Have a Question About Cevimeline and Gamma-oryzanol?

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.