Poinsettia + Cromolyn
Cromolyn brand name: Nasalcrom.
We found no known interaction between Poinsettia and Cromolyn 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.
Poinsettia and Cromolyn
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 Cromolyn and Poinsettia 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 Poinsettia at all — not against Cromolyn, 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.
Poinsettia 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.
Poinsettia in Pregnancy & Breastfeeding
When used orally or 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
See Every Supplement That Interacts With Cromolyn
This page covers Poinsettia only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Cromolyn page lists 17 supplements it has a documented interaction with, worst first, each one explained.
The most serious there right now: Activated Charcoal (major), Coffee Charcoal (moderate), European Mandrake (moderate), Glucomannan (moderate) and Guar Gum (moderate).
By severity: 1 major · 7 moderate · 9 minor.
From our pharmacist’s overview on the Cromolyn page
“Cromolyn (Nasalcrom) calms allergy symptoms by steadying the immune cells that release histamine, and when taken by mouth it has to be absorbed through the gut, which is exactly where all 17 of these interactions operate. Every ingredient on this list can change how much of an oral cromolyn dose actually reaches you, and one, activated…”
Reviewed by 2 · Jul 18, 2026
Where Poinsettia and Cromolyn 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.
#984 of 1,452 supplements looked up here in the last 7 days
#1,989 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 Poinsettia reference on this page ↓
- Freshness: we automatically re-check this combination every week — this pair was last verified September 13, 2026. The Poinsettia and Cromolyn 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 Poinsettia
What is Poinsettia?
- Traditional folk skin remedies
- Traditional use as a topical poultice
- Folk use for fever
- Decorative ornamental plant (most common use today)
Poinsettia is best known as a popular holiday ornamental plant, not a proven dietary supplement, and there is no reliable evidence that it works for any health condition. While its toxicity is often exaggerated, the plant and its milky sap can cause stomach upset and skin or eye irritation, so it is not recommended for medicinal use. If you are considering any herbal product, talk with your pharmacist or doctor first.
Euphorbia pulcherrima · Euphorbiaceae · Leaves, stems, and milky sap (latex); not a true medicinal supplement · Rarely used as a supplement; historically the plant parts and sap have been used in traditional folk preparations
An interaction check asks whether these two react with each other — it does not ask whether Poinsettia is a good idea for someone in your situation. Here is what our Poinsettia record says about it on its own.
Poinsettia: dosing
There is no established or recommended dose for poinsettia because it is not a recognized dietary supplement and is not intended for internal use. No standardized products exist, and safe amounts are unknown.Given the lack of evidence and the risk of irritation, poinsettia should not be taken as a remedy.
From our Poinsettia monograph — the full record covers uses, side effects and every documented interaction.
About Cromolyn Sodium Nasal Solution
What Is Cromolyn Sodium Nasal Solution Used For?
Brand name: Nasalcrom
Cromolyn sodium nasal solution is used to prevent and relieve nasal symptoms of hay fever and other nasal allergies. It works best when used regularly throughout your allergy season or whenever you're around your allergy triggers.
Specific symptoms it targets include:
- Runny or itchy nose
- Sneezing
- Allergic stuffy nose (nasal congestion caused by allergies)
Other Drugs & Poinsettia
Browse every other medication we’ve checked against Poinsettia — 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 Poinsettia 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 ›
- Metoprolol ›
- Aspirin ›
- Ivermectin ›
- Rivaroxaban ›
- Rosuvastatin ›
- Escitalopram ›
- Tadalafil ›
- Acetaminophen ›
- Clopidogrel ›
- Valacyclovir ›
- Atorvastatin ›
- Docusate ›
- Hydroxyurea ›
- Abemaciclib ›
- Methamphetamine ›
- Ibuprofen ›
- Sumatriptan ›
- Semaglutide ›
- Tirzepatide ›
- Warfarin Sodium ›
- Prednisone ›
- Propranolol ›
- Lisdexamfetamine ›
- Acyclovir ›
- Bupropion ›
- Metformin ›
- Amoxicillin ›
- Lisinopril ›
- Bendamustine ›
- Amitriptyline ›
- Doxycycline ›
- Lamotrigine ›
- Fluoxetine ›
- Methotrexate ›
- Acetaminophen, Codeine ›
- Gabapentin ›
- Amphetamine ›
- Pregabalin ›
- Isotretinoin ›
- Dextroamphetamine ›
- Azithromycin ›
- Clonazepam ›
- Quetiapine ›
- Omeprazole ›
- Amlodipine Besylate ›
- Methylene Blue ›
- Duloxetine ›
- Buspirone ›
- Letrozole ›
- Citalopram ›
- Ciprofloxacin ›
- Naproxen ›
Showing the 60 most looked-up of 2,829 medications checked with no known interaction — see the full Poinsettia list.
Poinsettia References
The 4 references that drive our Poinsettia 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.
- Ellenhorn MJ, et al. Ellenhorn's Medical Toxicology: Diagnoses and Treatment of Human Poisoning. 2nd ed. Baltimore, MD: Williams & Wilkins, 1997.
- Krenzelok EP, Jacobsen TD, Aronis JM. Poinsettia exposures have good outcomes...just as we thought. Am J Emerg Med 1996;14:671-4. PubMed
- Petersen DD. Common plant toxicology: a comparison of national and southwest Ohio data trends on plant poisonings in the 21st century. Toxicol Appl Pharmacol. 2011;254(2):148-53. PubMed
- Evens ZN, Stellpflug SJ. Holiday plants with toxic misconceptions. West J Emerg Med. 2012;13(6):538-542. 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 Poinsettia and Cromolyn Together: Common Questions
Is it safe to take Poinsettia with Cromolyn?
Do Poinsettia and Cromolyn have any of the same side effects?
Does Cromolyn interact with any supplements?
Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy
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Still Have a Question About Cromolyn and Poinsettia?
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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.