Medication interaction hub

What Supplements Interact with Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine?

Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine brand name: Respa ARM. Every interaction below applies to the brands too.

229 Interactions 10 Major 175 Moderate 44 Minor
Curated & coded by · Clinical Pharmacist · Updated September 25, 2026

Drug–supplement interaction data sourced from Natural Medicines Pro, the licensed clinical database from TRC Healthcare / Therapeutic Research, with additional analysis by the HelloPharmacist Pharmacist Team. Our sources · Editorial policy

What is this page for?

One answer, for one medication: what supplements and herbal products interact with Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine? Every vitamin, herb, and supplement ingredient we’ve checked against it is on this page, ranked by severity, each linking to the full report for that exact pair.

This page covers supplement interactions only — to check Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine against your other medications, use the drug–drug interaction checker. Educational information from our licensed clinical databases, not medical advice. Our editorial policy

HelloPharmacist Bottom Line
Our Pharmacist Explains
What is this? The interaction data in the HelloPharmacist supplement database is licensed from Natural Medicines Pro by TRC Healthcare (Therapeutic Research). HelloPharmacist pharmacists often add our own analysis and context on top of that licensed data — such as this Bottom Line summary and the notes on individual interaction pages — and any such commentary is noted as ours.

Respa ARM combines belladonna alkaloids, chlorpheniramine, and two stimulant decongestants (phenylephrine and phenylpropanolamine), and its 229 supplement interactions deserve real caution, ten of them rated major. The biggest cluster, 121 ingredients, involves CYP3A4, the liver enzyme that clears this medicine; grapefruit can push drug levels up while St. John's wort drives them down. Another 44, including everyday caffeine sources like black tea and cocoa, stack extra stimulant load on decongestants that already raise blood pressure and heart rate.

Much of the rest echoes what the drug already does. Thirty ingredients add anticholinergic drying, meaning more constipation, blurred vision, and confusion, and 20 touch serotonin. Most entries, 175 of the 229, rate moderate, with 44 minor, but the ten major ones deserve a careful read; ephedra and similar stimulant herbs combine worst with the decongestants in this product.

— , Clinical Pharmacist · July 18, 2026

Major 10 Moderate 175 Minor 44 No known interaction 1,223

This box checks one ingredient at a time (like turmeric or magnesium). Taking a supplement product with a whole label of ingredients? Search the product instead — we check every ingredient on it ↓

Top Ingredient Interactions

Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine: Top Interactions at a Glance

The most significant Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine supplement & herbal interactions, colored by severity. Tap any ingredient to open the full report for that pair.

Showing the 12 highest-ranked of 229 interacting ingredients — plus 1,223 more checked with no known interaction. See the complete ranked list.

Start here

The Major Interactions to Know About

The most clinically significant Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine + supplement combinations in our database, best-documented first. Open any card for the full report.

Major Likelihood Likely Grapefruit + Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolaminei

Grapefruit juice can increase levels of drugs metabolized by CYP3A4.

Read the full interaction Major Likelihood Probable Activated Charcoal + Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolaminei

Activated charcoal reduces systemic exposure to many drugs, including those that undergo enterohepatic recirculation, regardless of the route of administration.

Read the full interaction Major Likelihood Probable Ephedra + Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolaminei

Theoretically, concomitant use might increase the risk for serious adverse effects.

Read the full interaction Major Likelihood Probable Henbane + Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolaminei

Concomitant use of henbane can have additive anticholinergic effects and adverse effects with amantadine, antihistamines, atropine, belladonna alkaloids, hyoscy...

Read the full interaction Major Likelihood Probable Lithium + Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolaminei

Theoretically, taking lithium supplements with serotonergic drugs might both mask and increase the risk of serotonin syndrome.

Read the full interaction Major Likelihood Probable Peyote + Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolaminei

Concomitant use of peyote with stimulant drugs may increase the risk of adverse CNS effects.

Read the full interaction
The complete list

Every Supplement Checked Against Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine

All 1,452 ingredients in our database, ranked by severity — 229 with a Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine interaction on file and 1,223 with none found. Filter by severity or search any ingredient; hover the for what each ingredient is.

Looking for an interaction with a specific supplement product? Search products instead ↓

Straight answers

Can You Take It With Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine?

One-line answers, one card per combination — scroll through today’s 20 and tap any card for the full report. A different set rotates in daily until every combination has had its turn.

Can you take Ashwagandha with Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Some animal studies have reported that ashwagandha can enhance serotonergic transmission by altering certain serotonin (5-HT) receptors.

Full Ashwagandha + Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine answer

Can you take Thyme with Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, concurrent use of anticholinergic drugs and thyme essential oil might reduce the effects of anticholinergic drugs.

Full Thyme + Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine answer

Can you take Atractylodes with Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Theoretically, atractylodes might increase the levels of CYP3A4 substrates.

Full Atractylodes + Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine answer

Can you take Cocoa with Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, concomitant use might increase stimulant adverse effects.

Full Cocoa + Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine answer

Can you take Coffee with Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, concomitant use might increase stimulant adverse effects.

Full Coffee + Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine answer

Can you take Coffee Charcoal with Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Coffee charcoal can reduce the absorption of orally administered drugs and should be separated from oral drug administration by at least two...

Full Coffee Charcoal + Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine answer

Can you take Cola Nut with Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, concomitant use might increase stimulant adverse effects.

Full Cola Nut + Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine answer

Can you take Datura Wrightii with Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Datura wrightii contains atropine and scopolamine, as well as other tropane alkaloids with anticholinergic activity.

Full Datura Wrightii + Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine answer

Can you take European Mandrake with Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, concurrent use might increase absorption of some drugs because of inhibited gastrointestinal (GI) motility caused by European...

Full European Mandrake + Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine answer

Can you take Fever Bark with Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, fever bark might increase or decrease the effects of stimulant drugs.

Full Fever Bark + Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine answer

Can you take Glucomannan with Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, glucomannan may decrease absorption of drugs taken orally.

Full Glucomannan + Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine answer

Can you take Green Coffee with Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, concomitant use might increase stimulant adverse effects.

Full Green Coffee + Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine answer

Can you take Green Tea with Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, concomitant use might increase stimulant adverse effects.

Full Green Tea + Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine answer

Can you take Guarana with Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, phenylpropanolamine might increase the risk of hypertension, as well as the levels and adverse effects of caffeine.

Full Guarana + Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine answer

Can you take Guggul with Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, guggul might reduce the effects of CYP3A4 substrates.

Full Guggul + Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine answer

Can you take Ilex Guayusa with Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, concomitant use might increase stimulant adverse effects.

Full Ilex Guayusa + Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine answer

Can you take Masterwort with Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. The use of masterwort in conjunction with photosensitizing drugs is contraindicated due to the potential for additive photosensitizing effec...

Full Masterwort + Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine answer

Can you take Oolong Tea with Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, concomitant use might increase stimulant adverse effects.

Full Oolong Tea + Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine answer

Can you take Psilocybin with Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, concomitant use of psilocybin with stimulant drugs might increase stimulant adverse effects.

Full Psilocybin + Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine answer

Can you take Pu-erh Tea with Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, concomitant use might increase stimulant adverse effects.

Full Pu-erh Tea + Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine answer
Read the list like a pharmacist

What Severity, Likelihood & Evidence Mean

Severity — How Serious It Can Be

  • Major. Clinically significant; generally best avoided, or used only under direct professional supervision.
  • Moderate. May need monitoring, a dose adjustment, or separating the times you take each one.
  • Minor. Generally not clinically significant, but still worth noting and mentioning to your pharmacist.
  • No known interaction. Checked against our sources with nothing documented — not the same as proven safety.

Likelihood — How Well It’s Documented

  • Likely. Well-controlled human studies have demonstrated the likely existence of this interaction
  • Probable. Interaction has not been documented in well-controlled studies, however, the interaction has been demonstrated in some small human studies or in controlled animal studies in conjunction with multiple case reports.
  • Possible. Interaction has been documented in animal or in lab research, or the interaction has been documented in humans but is limited to case reports or conflicting clinical research exists
  • Unlikely. Interaction has been demonstrated in animal or in lab research but has been shown not to occur in humans.

Where This Data Comes From

  • Interaction records are evidence-graded and sourced from the Natural Medicines database (TRC Healthcare), the same reference used by pharmacists and hospitals.
  • Each entry links to a full report with the clinical detail, likelihood, evidence level, and citations for that exact combination.
  • Content is reviewed by licensed HelloPharmacist pharmacists — see our data sources and editorial standards.

How Does Our Interaction Checker Work?

Behind every verdict on this page is a category system. Our source database doesn’t document supplement interactions drug-by-drug — it documents them against groups of medications that behave the same way (for example, “drugs processed by the CYP3A4 liver enzyme” or “blood-thinning medications”).

So the check works in three steps: (1) Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine is classified into the pharmacology categories it belongs to, (2) every supplement interaction documented against any of those categories is inherited by Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine, and (3) each ingredient keeps its own severity, likelihood, and evidence grades from the underlying record. That’s why one supplement can carry several records for one drug — it may interact through more than one category.

Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine sits in 11 interaction categories. Open any one to see what the group means:

Cytochrome P450 3A4 (Cyp3A4) Substrates 121 ingredients

A drug-metabolism group: these medications are processed by the named liver enzyme (a cytochrome P450). Supplements that speed this enzyme up or slow it down can lower or raise the medication's levels in your body.

121 of the supplement ingredients on this page reach Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine through this category.

Stimulant Drugs 44 ingredients

A pharmacology grouping from our source database: medications in this group share a property that certain supplements are known to interact with, so an interaction documented for the group applies to every drug in it.

44 of the supplement ingredients on this page reach Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine through this category.

Anticholinergic Drugs 30 ingredients

A pharmacology grouping from our source database: medications in this group share a property that certain supplements are known to interact with, so an interaction documented for the group applies to every drug in it.

30 of the supplement ingredients on this page reach Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine through this category.

Photosensitizing Drugs 20 ingredients

Medications that make skin more sun-sensitive. Supplements with the same property can compound it.

20 of the supplement ingredients on this page reach Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine through this category.

Serotonergic Drugs 20 ingredients

Medications that raise serotonin activity. Combining them with serotonin-active supplements can, in rare cases, push serotonin too high.

20 of the supplement ingredients on this page reach Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine through this category.

Oral Drugs 17 ingredients

A pharmacology grouping from our source database: medications in this group share a property that certain supplements are known to interact with, so an interaction documented for the group applies to every drug in it.

17 of the supplement ingredients on this page reach Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine through this category.

Phenylpropanolamine 12 ingredients

A pharmacology grouping from our source database: medications in this group share a property that certain supplements are known to interact with, so an interaction documented for the group applies to every drug in it.

12 of the supplement ingredients on this page reach Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine through this category.

Seizure Threshold Lowering Drugs 6 ingredients

A pharmacology grouping from our source database: medications in this group share a property that certain supplements are known to interact with, so an interaction documented for the group applies to every drug in it.

6 of the supplement ingredients on this page reach Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine through this category.

Cytochrome P450 2D6 (Cyp2D6) Inhibitors 3 ingredients

A drug-metabolism group: these medications are processed by the named liver enzyme (a cytochrome P450). Supplements that speed this enzyme up or slow it down can lower or raise the medication's levels in your body.

3 of the supplement ingredients on this page reach Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine through this category.

Alpha-Adrenergic Agonists 1 ingredient

A pharmacology grouping from our source database: medications in this group share a property that certain supplements are known to interact with, so an interaction documented for the group applies to every drug in it.

1 of the supplement ingredient on this page reaches Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine through this category.

Serotonergic Drugs 1 ingredient

Medications that raise serotonin activity. Combining them with serotonin-active supplements can, in rare cases, push serotonin too high.

1 of the supplement ingredient on this page reaches Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine through this category.

Check a real product

Take a Supplement Product? Check the Whole Bottle Against Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine

Most supplements are combination products — and the interaction may come from an ingredient you didn’t buy it for. Search any product below (or scan its label) and we’ll check every ingredient on it against Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine.

Search a supplement product

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Grounded search over our product catalog — every verdict comes from our interaction database, never AI guesswork. How we use AI

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Photograph any Supplement Facts panel — we read the ingredients and check each one against your medications. Free, in seconds.

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Pharmacist Counseling Corner

Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine & Supplements: Common Questions

What supplements interact with Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine?
In our interaction database, 229 supplement and herbal ingredients have an interaction with Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine on file — 10 rated major, 175 moderate, and 44 minor. That number sounds scarier than it is: severity matters far more than the count, which is why the list on this page is ranked instead of alphabetical. Start at the top. The highest-ranked right now: Grapefruit, Activated Charcoal, Ephedra.
Which Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine supplement interactions are the most serious?
Focus on the major group: Grapefruit, Activated Charcoal, Ephedra, Henbane and Lithium, among others. A major rating means the combination can be clinically significant, not that harm is guaranteed — but it's exactly the kind of thing to run past your pharmacist before your next dose, not after. Jump to the ranked list.
Can I take vitamins or supplements while on Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine?
That depends entirely on which supplement. The honest answer for Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine is in the ranked list above — and if what you take is a combination product with a dozen ingredients, don't check them one by one: photograph the label with our scanner and we'll check the whole thing at once. Try the label scanner or the interaction checker.
Do brands like Respa ARM have the same supplement interactions as Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine?
Yes — Respa ARM all contain Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine, so everything on this page applies to them equally. Interactions belong to the active drug, never to the brand on the box; the same is true of generics.
Where do these interaction ratings come from?
Every rating comes from the Natural Medicines database — the same evidence-graded reference pharmacists and hospitals use — and each interaction carries three separate grades: severity (how bad it can be), likelihood (how well it's documented in studies and case reports), and an evidence level. Our pharmacists review the content; we never let an AI decide an interaction. See how to read the ratings and our editorial policy.
What about Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine and my other medications?
This page covers Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine against supplements and herbal ingredients. Checking Belladonna Alkaloids, Chlorpheniramine, Phenylephrine, Phenylpropanolamine against your other prescription or OTC medications is a different tool — our drug interaction checker covers that side. Head to the drug–drug interaction checker.

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

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Sourcing

Where This Data Comes From — and Why You Can Trust It

🧪 Licensed clinical database

Every interaction verdict on this page comes from Natural Medicines Pro (TRC Healthcare / Therapeutic Research) — the same evidence-graded reference used by pharmacists and hospitals. We license this data directly; we do not scrape it, and no AI invents an interaction.

🧑‍⚕️ Pharmacist review

This page is curated and coded by , Clinical Pharmacist, with additional analysis by the HelloPharmacist Pharmacist Team. Editorial commentary is ours; the licensed interaction records are shown as sourced.

🔄 Kept current

Our interaction database refreshes on a weekly cycle, and this page re-checks the live database every time it’s rebuilt — what you see reflects the database as of September 25, 2026.

🔍 Full transparency

How every dataset on this site is sourced, licensed, and updated is documented publicly: our data sources · editorial policy · how we use AI.

Educational information, not medical advice. An interaction being on file does not mean it will happen to you — and absence of one is not proof of safety. Never start or stop a medication or supplement without talking to your pharmacist or doctor.