Dymethazine + Irinotecan
Irinotecan brand names: Camptosar, Onivyde.
We found no known interaction between Dymethazine and Irinotecan 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 Irinotecan states a food rule worth keeping to.
Dymethazine and Irinotecan
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 Irinotecan and Dymethazine 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 Dymethazine at all — not against Irinotecan, 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.
Dymethazine 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.
Dymethazine in Pregnancy & Breastfeeding
When used orally. Anabolic androgenic steroids can disrupt the body's hormonal balance and cause various adverse effects including reduced fertility, hair loss, acne, and behavioral changes. Anabolic androgenic steroid use has also been associated with hepatotoxicity and increased risk for heart disease. The U.S. Food and Drug Administration and other regulatory agencies warn that dietary supplements containing anabolic steroids are dangerous. 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 Irinotecan Products Have a Food Rule — Dymethazine Should Not Break It
At least one FDA label for a product containing Irinotecan says to take it on an empty stomach. Most supplements — Dymethazine included — are taken with a meal, so the easy mistake is swallowing both together at breakfast. Where that rule applies, keep Irinotecan on its own and move Dymethazine to a meal later in the day.
This may not be true of your version. Food instructions belong to the product, not the ingredient: two Irinotecan 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.
Antiemetic agents should be given on the day of treatment, starting at least 30 minutes before administration of CAMPTOSAR.
From the Dosage and Administration section of the FDA label we read for Irinotecan — where that label names a specific product, the instruction is that product's. See the Irinotecan drug page ›
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 Irinotecan
This page covers Dymethazine only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Irinotecan page lists 153 supplements it has a documented interaction with, worst first, each one explained.
The most serious there right now: Activated Charcoal (major), Apple (major), Grapefruit (major), St. John's Wort (major) and Sweet Orange (major).
By severity: 5 major · 107 moderate · 41 minor.
From our pharmacist’s overview on the Irinotecan page
“St. John's wort is the single riskiest supplement for anyone receiving irinotecan (Camptosar, Onivyde).”
Reviewed by 2 · Jul 18, 2026
Taking Dymethazine as Part of a Dietary Supplement Product? Check It for Interactions
We hold 18 real supplement products containing Dymethazine, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Dymethazine. Even though Dymethazine itself has no known interaction with Irinotecan, another ingredient on your label might. Find your product and we’ll check every ingredient on its label:
Where Dymethazine and Irinotecan 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.
#1,011 of 1,452 supplements looked up here in the last 7 days
#2,241 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 Dymethazine reference on this page ↓
- Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The Dymethazine and Irinotecan 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 Dymethazine
What is Dymethazine?
- Muscle building
- Strength gains
- Bodybuilding bulking cycles
- Performance enhancement
Dymethazine is a synthetic anabolic-androgenic steroid (a so-called 'prohormone' or 'designer steroid'), not a true dietary supplement or herb. It carries serious health risks including liver damage and hormonal disruption, is banned in sports, and is not approved or recommended for use. We strongly advise against taking it.
Synthetic anabolic-androgenic steroid (not a plant) · Capsules, tablets
An interaction check asks whether these two react with each other — it does not ask whether Dymethazine is a good idea for someone in your situation. Here is what our Dymethazine record says about it on its own.
Dymethazine: dosing
There is no established or recommended safe dose for Dymethazine, because it is not an approved medicine or a legitimate dietary supplement. We do not provide dosing for it.Because it is an anabolic steroid with real health risks, the safest amount is none.
From our Dymethazine monograph — the full record covers uses, side effects and every documented interaction.
About Irinotecan Lipid Complex Injection
What Is Irinotecan Lipid Complex Injection Used For?
Brand names: Camptosar, Onivyde
-
Irinotecan lipid complex is used in combination with other medications to treat pancreatic cancer that has spread to other parts of the body that has worsened after treatment with other chemotherapy medications. Irinotecan lipid complex is in a class of antineoplastic medications called topoisomerase I inhibitors. It works by stopping the growth of cancer cells.
Other Drugs & Dymethazine
Browse every other medication we’ve checked against Dymethazine — 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 Dymethazine against these medications and found no known interaction in our sources. Open any page to confirm.
- Apixaban ›
- Levothyroxine ›
- Amlodipine ›
- Methylphenidate ›
- Warfarin ›
- Sertraline ›
- Testosterone ›
- Losartan Potassium ›
- Ivermectin ›
- Abemaciclib ›
- Aspirin ›
- Metoprolol ›
- Acetaminophen ›
- Rosuvastatin ›
- Rivaroxaban ›
- Escitalopram ›
- Clopidogrel ›
- Atorvastatin ›
- Tadalafil ›
- Docusate ›
- Tirzepatide ›
- Ibuprofen ›
- Methamphetamine ›
- Hydroxyurea ›
- Warfarin Sodium ›
- Valacyclovir ›
- Sumatriptan ›
- Semaglutide ›
- Prednisone ›
- Lisdexamfetamine ›
- Propranolol ›
- Metformin ›
- Amitriptyline ›
- Amoxicillin ›
- Lisinopril ›
- Isotretinoin ›
- Amlodipine Besylate ›
- Methotrexate ›
- Bendamustine ›
- Bupropion ›
- Amphetamine ›
- Fluoxetine ›
- Doxycycline ›
- Acyclovir ›
- Azithromycin ›
- Lamotrigine ›
- Pregabalin ›
- Dextroamphetamine ›
- Gabapentin ›
- Acetaminophen, Codeine ›
- Quetiapine ›
- Clonazepam ›
- Levothyroxine, Liothyronine ›
- Naproxen ›
- Omeprazole ›
- Letrozole ›
- Methylene Blue ›
- Duloxetine ›
- Buspirone ›
- Citalopram ›
Showing the 60 most looked-up of 2,829 medications checked with no known interaction — see the full Dymethazine list.
Dymethazine References
The 2 references that drive our Dymethazine 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.
- Joseph JF, Parr MK. Synthetic androgens as designer supplements. Curr Neuropharmacol. 2015;13(1):89-100. PubMed
- Agbenyefia P, Arnold CA, Kirkpatrick R 3rd. Cholestatic jaundice with the use of methylstenbolone and dymethazine, designer steroids found in super DMZ Rx 2.0 "Nutritional Supplement": A case report. J Investig Med High Impact Case Rep 2014;2(2):232470961 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 Dymethazine and Irinotecan Together: Common Questions
Is it safe to take Dymethazine with Irinotecan?
Should I take Dymethazine and Irinotecan at the same time of day?
Does Irinotecan interact with any supplements?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
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Still Have a Question About Irinotecan and Dymethazine?
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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.