Chlorine Dioxide + Fenoprofen Calcium
Fenoprofen Calcium brand name: Nalfon.
We found no known interaction between Chlorine Dioxide and Fenoprofen Calcium 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 label for Fenoprofen Calcium states a food rule worth keeping to, and 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.
Chlorine Dioxide and Fenoprofen Calcium
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 Fenoprofen Calcium and Chlorine Dioxide 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 Chlorine Dioxide at all — not against Fenoprofen Calcium, 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.
Chlorine Dioxide safety at a glance
Pregnancy & breastfeeding ratings are from Natural Medicines (Therapeutic Research Center) — the full detail is in the Special populations card below. Safety guidance is general; always confirm with your pharmacist or doctor for your situation.
Chlorine Dioxide in Pregnancy & Breastfeeding
When used orally for medicinal purposes. Chlorine dioxide supplement products typically contain 28% sodium chlorite, which can provide 3-8 mg of chlorine dioxide per drop when mixed with citric acid as directed. Chlorine dioxide has been reported to cause serious complications, including severe vomiting and diarrhea, life-threatening low blood pressure, hemolysis, and acute liver failure. There is insufficient reliable information available about the safety of chlorine dioxide when used topically; avoid using.
DISCLAIMER: This tool is intended for informational purposes only, and should not be interpreted as specific medical advice. Patients should consult with a qualified healthcare provider before making decisions about therapies and/or health conditions.© 2026 Therapeutic Research Center
Some Fenoprofen Calcium Products Have a Food Rule — Chlorine Dioxide Should Not Break It
At least one FDA label for a product containing Fenoprofen Calcium says to take it with food. If you take Chlorine Dioxide on an empty stomach out of habit, keep them separate — and take Fenoprofen Calcium with a meal where the label says to.
This may not be true of your version. Food instructions belong to the product, not the ingredient: two Fenoprofen Calcium products can carry different directions, and extended-release forms often differ from immediate-release ones. The label we read is quoted below — check the directions on your own box or bottle, or ask your pharmacist, for how to take the exact product you were given.
Fenoprofen Calcium may be administered with meals or with milk.
From the Dosage and Administration section of the FDA label we read for Fenoprofen Calcium — where that label names a specific product, the instruction is that product's. Read the label on DailyMed ›
A food rule is not an interaction — it is about how much of the medicine you absorb. The directions that came with your own product, and your pharmacist, outrank anything on this page.
See Every Supplement That Interacts With Fenoprofen Calcium
This page covers Chlorine Dioxide only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Fenoprofen Calcium page lists 32 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), Siberian Cocklebur (major) and Wine (major).
By severity: 5 major · 16 moderate · 11 minor.
From our pharmacist’s overview on the Fenoprofen Calcium page
“The kidneys and the stomach lining take the brunt of any NSAID, and fenoprofen calcium (Nalfon), prescribed for arthritis and other pain, is no exception. This list of 32 interacting supplements deserves real caution; five carry a major rating, and understanding those five comes first.”
Reviewed by 2 · Jul 18, 2026
Where Chlorine Dioxide and Fenoprofen Calcium 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.
#1,239 of 1,452 supplements looked up here in the last 7 days
#1,730 of 2,830 medications looked up here in the last 7 days
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 Chlorine Dioxide reference on this page ↓
- Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The Chlorine Dioxide and Fenoprofen Calcium 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.
About Chlorine Dioxide
What is Chlorine Dioxide?
- Falsely promoted as a cure for infections
- Falsely promoted for COVID-19
- Falsely promoted for cancer
- Falsely promoted for autism
- Water disinfection (industrial/regulated use only)
Chlorine dioxide products sold as 'Miracle Mineral Solution' (MMS) and similar names are essentially industrial bleach and are not safe to swallow. The FDA has issued strong warnings that drinking these products can cause serious, life-threatening harm, and there is no legitimate evidence they treat any disease. Do not consume chlorine dioxide supplements under any circumstances.
Not a plant; a chemical compound (chlorine dioxide gas, ClO2) · Liquid drops sold as 'Miracle Mineral Solution' (MMS), sodium chlorite solution mixed with an acid 'activator', water purification solution
An interaction check asks whether these two react with each other — it does not ask whether Chlorine Dioxide is a good idea for someone in your situation. Here is what our Chlorine Dioxide record says about it on its own.
Chlorine Dioxide: dosing
There is no safe or recommended dose of chlorine dioxide to take as a supplement. Health authorities, including the FDA, advise that these products should not be consumed at all.Any 'protocol' or dosing instructions found online or on product labels for MMS-type products should be ignored. If you have any of these products, do not use them. If you have already taken some, contact a healthcare provider or poison control right away.
From our Chlorine Dioxide monograph — the full record covers uses, side effects and every documented interaction.
About Fenoprofen
What Is Fenoprofen Used For?
Brand name: Nalfon
Fenoprofen is used to relieve mild to moderate pain in adults. It is also used to reduce the pain, swelling, and stiffness caused by rheumatoid arthritis and osteoarthritis.
These uses are supported by products including Fenoprofen Calcium, Fenopron, and Nalfon capsules. Nalfon is also available as a tablet.
Other Drugs & Chlorine Dioxide
Browse every other medication we’ve checked against Chlorine Dioxide — both the ones with a known interaction and the ones without. Select any drug for the full detail.
No drugs match “”.
No interaction 2,829 drugs checked — show the list
We also checked Chlorine Dioxide against these medications and found no known interaction in our sources. Open any page to confirm.
- Apixaban ›
- Levothyroxine ›
- Amlodipine ›
- Warfarin ›
- Methylphenidate ›
- Sertraline ›
- Abemaciclib ›
- Testosterone ›
- Ivermectin ›
- Acetaminophen ›
- Losartan Potassium ›
- Aspirin ›
- Rosuvastatin ›
- Metoprolol ›
- Clopidogrel ›
- Escitalopram ›
- Rivaroxaban ›
- Atorvastatin ›
- Docusate ›
- Ibuprofen ›
- Tirzepatide ›
- Methamphetamine ›
- Warfarin Sodium ›
- Tadalafil ›
- Valacyclovir ›
- Sumatriptan ›
- Hydroxyurea ›
- Prednisone ›
- Semaglutide ›
- Metformin ›
- Amitriptyline ›
- Propranolol ›
- Lisdexamfetamine ›
- Amoxicillin ›
- Isotretinoin ›
- Methotrexate ›
- Lisinopril ›
- Amlodipine Besylate ›
- Amphetamine ›
- Bupropion ›
- Bendamustine ›
- Fluoxetine ›
- Doxycycline ›
- Azithromycin ›
- Pregabalin ›
- Acyclovir ›
- Gabapentin ›
- Lamotrigine ›
- Dextroamphetamine ›
- Levothyroxine, Liothyronine ›
- Naproxen ›
- Acetaminophen, Codeine ›
- Clonazepam ›
- Quetiapine ›
- Omeprazole ›
- Letrozole ›
- Duloxetine ›
- Citalopram ›
- Methylene Blue ›
- Buspirone ›
Showing the 60 most looked-up of 2,829 medications checked with no known interaction — see the full Chlorine Dioxide list.
Chlorine Dioxide References
The 10 references that drive our Chlorine Dioxide 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.
- Olin AC, Granung G, Hagberg S, et al. Respiratory health among bleachery workers exposed to ozone and chlorine dioxide. Scand J Work Environ Health. 2002 Apr;28(2):117-23. PubMed
- Kishan H. Chlorine dioxide-induced acute hemolysis. J Med Toxicol. 2009 Sep;5(3):177.
- Loh JM, Shafi H. Kikuchi-Fujimoto disease presenting after consumption of 'Miracle Mineral Solution' (sodium chlorite). BMJ Case Rep. 2014 Nov 24;2014:bcr2014205832. PubMed
- Moore GS, Calabrese EJ, Ho SC. Groups at potentially high risk from chlorine dioxide treated water. J Environ Pathol Toxicol. 1980 Sep;4(2-3):465-70.
- FDA. Danger: Don't Drink Miracle Mineral Solution or Similar Products. Available at: https://www.fda.gov/consumers/consumer-updates/danger-dont-drink-miracle-mineral-solution-or-similar-products?utm_campaign=FDA%20warns%20consumers%20about%20the%20dangero
- Agency for Toxic Substances and Disease Registry (ATSDR). ToxFAQs for Chlorine Dioxide and Chlorite. September 2004. Available at: https://www.atsdr.cdc.gov/toxfaqs/tfacts160.pdf. Accessed on May 4, 2020.
- Burke D, Zakhary B, Pinelis E. Acute Hemolysis Following an Overdose of Miracle Mineral Solution in a Patient With Normal Glucose-6-Phosphate Dehydrogenase Levels. Chest. 2014;146(4_MeetingAbstracts):273A. DOI
- Medina-Avitia E, Tella-Vega P, García-Estrada C. Acute kidney injury secondary to chlorine dioxide use for COVID-19 prevention. Hemodial Int. 2021 Oct;25(4):E40-E43. PubMed
- Lardieri A, Cheng C, Jones SC, McCulley L. Harmful effects of chlorine dioxide exposure. Clin Toxicol (Phila). 2021 May;59(5):448-9. PubMed
- Arellano-Gutiérrez G, Aldana-Zaragoza EH, Pérez-Fabián A. Intestinal perforation associated with chlorine dioxide ingestion: an adult chronic consumer during COVID-19 pandemic. Clin J Gastroenterol. 2021 Dec;14(6):1655-60. 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.
Taking Chlorine Dioxide and Fenoprofen Calcium Together: Common Questions
Is it safe to take Chlorine Dioxide with Fenoprofen Calcium?
Do Chlorine Dioxide and Fenoprofen Calcium have any of the same side effects?
Should I take Chlorine Dioxide and Fenoprofen Calcium at the same time of day?
Does Fenoprofen Calcium interact with any supplements?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
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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.