Drug & supplement interaction

Rice Protein + Naproxen

Naproxen brand names: Naprosyn, Naprelan, Anaprox, Anaprox DS, Naproxyn, and others.

No Known Interaction
Medically reviewed by · Updated July 2026 · Pair last verified Sep 13, 2026
The bottom line No known interaction

We found no known interaction between Rice Protein and Naproxen 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. Additionally, although there is no interaction, the two are separately associated with some of the same side effects, which would make a new symptom harder to attribute to one or the other.

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Interaction report

Rice Protein and Naproxen

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 Naproxen and Rice Protein 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.

Rice Protein safety at a glance

Rice Protein overall Generally safe Rice protein is generally considered safe for most healthy adults when used as a food.
Pregnancy Use caution Whole food rice is fine, but concentrated supplements are not well studied in pregnancy, so check with your provider first.
Breastfeeding Use caution Likely fine as a food, but concentrated protein supplements are not well studied while breastfeeding.

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

Still wondering about combining Naproxen and Rice Protein? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
How we checked

Why No Interaction Is Listed for Naproxen

Interactions in our licensed database are recorded against drug classes, not just single drug names. Naproxen is filed under 10 classifications — including nonsteroidal anti-inflammatory drugs (nsaids), cytochrome p450 2c9 (cyp2c9) substrates, anticoagulant/antiplatelet drugs. Rice Protein has documented interactions with 1 drug class — the most serious being ace inhibitors (aceis) (moderate) — and none of Naproxen’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

Rice Protein Does Interact With Other Medications

Rice Protein has 23 moderate known drug interactions in our database — Naproxen isn’t one of them. If you take anything else, check it against the full list below.

Moderate 23 No known interaction 2,807 (incl. Naproxen)
Taking anything else?

Check Another of Your Medications Against Rice Protein

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

What to actually watch for

No Interaction Found — But Data Suggests Rice Protein and Naproxen May Share Several of the Same Side Effects

This is not an interaction. Neither one changes how your body handles the other, and nothing here says they react together. What our sources do show is that each has separately been linked to the effects below — so taking both can make those effects more likely to turn up, and harder to pin on one or the other if they do. One of them is worth acting on rather than waiting out — marked below.

  • Dehydration Worth acting on Additional detail

    Rice Protein

    “Orally, rice protein has been rarely reported to cause enterocolitis symptoms of vomiting, diarrhea, and dehydration, possibly leading to acidosis and lethargy, in infants and young children. Rarely, enterocolitis symptoms are associated with an allergy to rice protein.”

    Rice Protein · Natural Medicines adverse-effect record, reported in allergic rhinitis (hay fever).

    2 sources cited
    1. 97806. Yasutomi M, Kosaka T, Kawakita A, et al. Rice protein-induced enterocolitis syndrome with transient specific IgE to boiled rice but not to retort-processed rice. Pediatr Int. 2014;56(1):110-2.
    2. 97811. Hojsak I, Kljaic-Turkalj M, Misak Z, Kolacek S. Rice protein-induced enterocolitis syndrome. Clin Nutr. 2006;25(3):533-6. PubMed

    Naproxen

    Listed in the ADVERSE REACTIONS section of the FDA label for Naproxen. Read the label on DailyMed ›

  • Tiredness / Diarrhea / Vomiting reported in 7.9% of FDA reports for Naproxen Additional detail

    Rice Protein

    Recorded for Rice Protein in the same Natural Medicines adverse-effect record shown under Dehydration above.

    Naproxen

    Listed in the ADVERSE REACTIONS section of the FDA label for Naproxen, and in voluntary FDA adverse-event reports. Read the label on DailyMed ›

Effects for Naproxen come from the ADVERSE REACTIONS section of its FDA label; effects for Rice Protein come from the Natural Medicines adverse-effect record, quoted above. Where a percentage is shown, it is the share of 165,062 voluntary FDA FAERS reports for Naproxen that mention that effect — a reporting proportion, not an incidence rate and not evidence the drug caused it. Wording is matched across sources by our own clinical vocabulary, so treat this as a prompt to pay attention, not a diagnosis.

From our Q&A

Questions About Rice Protein or Naproxen

These are real questions from readers, answered by the pharmacists at HelloPharmacist — written by a person, not generated from a database. Each one covers Rice Protein or Naproxen, 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 Naproxen

This page covers Rice Protein only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Naproxen page lists 311 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Asarabacca (major), Beer (major), Danshen (major) and Piracetam (major).

By severity: 7 major · 260 moderate · 44 minor.

Open the Naproxen interaction page

One more smart check

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

We hold 610 real supplement products containing Rice Protein, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Rice Protein. Even though Rice Protein itself has no known interaction with Naproxen, 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 Rice Protein and Naproxen 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 Rice Protein
Top half

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

29 days ago today
Medication Naproxen
Top 5%

#55 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 Rice Protein reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 13, 2026. The Rice Protein and Naproxen records this page draws on were last updated July 10, 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 Rice Protein

What is Rice Protein?

  • Building and maintaining muscle
  • Post-workout recovery
  • Plant-based protein source
  • Meal replacement and shakes
  • Weight management support

Rice protein is a plant-based protein powder made from rice that offers an easy way to add protein to your diet, especially if you avoid dairy or animal products. It is generally considered safe and well tolerated, though on its own it is lower in the amino acid lysine and is often blended with pea protein for a more complete amino acid profile. Talk to your pharmacist or doctor before using it if you have kidney problems or other health conditions.

Oryza sativa · Poaceae · Seed (grain/endosperm and bran) · Powder, protein shakes, capsules, blended plant-protein products

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

Rice Protein: dosing

There is no official standardized dose for rice protein. Serving sizes are usually based on how much protein you want to add to your diet, commonly around 20 to 30 grams of protein per scoop, but this varies by product.Always follow the directions on the product label and consider your total daily protein needs from all foods.

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

Read the full Rice Protein monograph & all interactions
Medication

About Naproxen

What Is Naproxen Used For?

Brand names: Naprosyn, Naprelan, Anaprox, Anaprox DS, Naproxyn, Navalbine, Naproxen, Naprosyn EC, Napro-Na, Aleve, Arthroxen, Synflex, EC-Naprosyn

Naproxen tablets, naproxen sodium tablets, and naproxen oral suspension are used to relieve the signs and symptoms of rheumatoid arthritis, osteoarthritis, ankylosing spondylitis, and polyarticular juvenile idiopathic arthritis. They are also used for tendonitis, bursitis, and acute gout, and for managing pain and primary dysmenorrhea (menstrual cramps).

Naproxen Sodium Controlled-Release Tablets are indicated for the same conditions plus the relief of mild to moderate pain. Several over-the-counter naproxen sodium products are indicated for the temporary relief of minor aches and pains from headache, backache, muscular aches, toothache, menstrual cramps, minor arthritis pain, and the common cold, and to temporarily reduce fever.

Most-Reported Side Effects for Naproxen

From FAERS, the FDA’s public side-effect reporting system (165,062 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.

Fatigue 13,047 reports
Nausea 12,185 reports
Arthralgia 11,086 reports
Headache 10,504 reports
Diarrhea 9,841 reports
See full Naproxen drug information
Keep checking

Other Drugs & Rice Protein

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

0Major
23Moderate
0Minor
2,806No known interaction
23 Moderate 2,806 No interaction
Moderate

23 interactions

No interaction 2,806 drugs checked — show the list

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

Showing the 60 most looked-up of 2,806 medications checked with no known interaction — see the full Rice Protein list.

See the full Rice Protein interactions page
See every supplement checked against Naproxen, ranked by severity
Evidence & sources

Rice Protein References

The 6 references that drive our Rice Protein 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. Joy JM, Lowery RP, Wilson JM, et al. The effects of 8 weeks of whey or rice protein supplementation on body composition and exercise performance. Nutr J 2013;12:86. PubMed
  2. Li GH, Qu MR, Wan JZ, You JM. Antihypertensive effect of rice protein hydrolysate with in vitro angiotensin I-converting enzyme inhibitory activity in spontaneously hypertensive rats. Asia Pac J Clin Nutr. 2007;16 Suppl 1:275-80.
  3. Reche M, Pascual C, Fiandor A, et al. The effect of a partially hydrolysed formula based on rice protein in the treatment of infants with cow's milk protein allergy. Pediatr Allergy Immunol. 2010;21(4 Pt 1):577-85. PubMed
  4. Amended final report on the safety assessment of Oryza sativa (rice) bran oil, Oryza sativa (rice) germ oil, rice bran acid, Oryza sativa (rice) bran wax, hydrogenated rice bran wax, Oryza sativa (rice) bran extract, Oryza sativa (rice) extract, Oryza sat
  5. Yasutomi M, Kosaka T, Kawakita A, et al. Rice protein-induced enterocolitis syndrome with transient specific IgE to boiled rice but not to retort-processed rice. Pediatr Int. 2014;56(1):110-2.
  6. Hojsak I, Kljaic-Turkalj M, Misak Z, Kolacek S. Rice protein-induced enterocolitis syndrome. Clin Nutr. 2006;25(3):533-6. 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 Rice Protein and Naproxen Together: Common Questions

Is it safe to take Rice Protein with Naproxen?
We do not list a known interaction between Rice Protein and Naproxen. 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.
Do Rice Protein and Naproxen have any of the same side effects?
Yes — our sources link each of them separately to 4 of the same effects. That is not an interaction: neither changes how your body handles the other. It does mean that if one of those effects turns up, it can be harder to tell which one is behind it. They are listed on this page with the source behind each.
How was the Rice Protein and Naproxen combination checked?
Interactions in our licensed database are recorded against drug classes. Naproxen is filed under 10 classifications, and Rice Protein has documented interactions with 1 drug class — none of Naproxen'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 Rice Protein interact with any other medications?
Yes. Rice Protein has 23 documented drug interactions in our database — Naproxen 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 Naproxen interact with any supplements?
Yes. Naproxen has documented interactions with 311 supplements in our database — Rice Protein is not one of them. The Naproxen 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

Rice Protein monograph Uses, safety profile, and every drug interaction in one place Naproxen drug information The full plain-English guide to this medication Naproxen supplement interactions Every supplement checked against Naproxen, 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 6 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Naproxen and Rice Protein?

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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.