Medication interaction hub

What Supplements Interact with Ephedrine, Guaifenesin, Phenobarbital, Theophylline?

Ephedrine, Guaifenesin, Phenobarbital, Theophylline brand name: Mudrane GG. Every interaction below applies to the brands too.

237 Interactions 22 Major 177 Moderate 38 Minor
Curated & coded by · Clinical Pharmacist · Updated October 2, 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 Ephedrine, Guaifenesin, Phenobarbital, Theophylline? 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 Ephedrine, Guaifenesin, Phenobarbital, Theophylline 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

237 supplements and herbal ingredients have interactions with Ephedrine, Guaifenesin, Phenobarbital, Theophylline on file in the HelloPharmacist interaction database — 22 rated major, 177 moderate, and 38 minor. The most serious involve Beer, St. John's Wort, Wine, 1,4-butanediol and Activated Charcoal.

Our assessment: with 22 major-rated interactions on the list, this one deserves real attention — know the major entries before combining anything with Ephedrine, Guaifenesin, Phenobarbital, Theophylline.

Major 22 Moderate 177 Minor 38 No known interaction 1,215

Ranked by severity below. Every entry links to the full pharmacist-reviewed report for that exact combination — what can happen, how likely it is, and what to do about it.

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 ↓

Most Viewed Ingredient Interactions

Ephedrine, Guaifenesin, Phenobarbital, Theophylline: Top Interactions at a Glance

The Ephedrine, Guaifenesin, Phenobarbital, Theophylline supplement & herbal interactions people checked most in the last 24 hours, colored by severity. Tap any ingredient to open the full report for that pair.

Showing the 12 highest-ranked of 237 interacting ingredients — plus 1,215 more checked with no known interaction. See the complete ranked list.

Start here

The Most-Checked Ephedrine, Guaifenesin, Phenobarbital, Theophylline Combinations Today

The Ephedrine, Guaifenesin, Phenobarbital, Theophylline + supplement pages people viewed most in the last 24 hours (resets at midnight). Open any card for the full report.

Major Likelihood Probable Caffeine + Ephedrine, Guaifenesin, Phenobarbital, Theophyllinei

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

Read the full interaction Major Likelihood Probable Coffee + Ephedrine, Guaifenesin, Phenobarbital, Theophyllinei

Theoretically, concomitant use might increase the risk of stimulant adverse effects.

Read the full interaction Major Likelihood Probable Green Tea + Ephedrine, Guaifenesin, Phenobarbital, Theophyllinei

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

Read the full interaction Moderate Likelihood Possible Saffron + Ephedrine, Guaifenesin, Phenobarbital, Theophyllinei

Theoretically, concomitant use of saffron and CNS depressants might have additive sedative effects.

Read the full interaction Major Likelihood Likely Beer + Ephedrine, Guaifenesin, Phenobarbital, Theophyllinei

Concomitant use may increase sedative and other adverse effects.

Read the full interaction Major Likelihood Likely St. John's Wort + Ephedrine, Guaifenesin, Phenobarbital, Theophyllinei

St.

Read the full interaction
The complete list

Every Supplement Checked Against Ephedrine, Guaifenesin, Phenobarbital, Theophylline

All 1,452 ingredients in our database, ranked by severity — 237 with a Ephedrine, Guaifenesin, Phenobarbital, Theophylline interaction on file and 1,215 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 Ephedrine, Guaifenesin, Phenobarbital, Theophylline?

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 Caffeine with Ephedrine, Guaifenesin, Phenobarbital, Theophylline?

Major Use real caution — this is a major-rated interaction, generally best avoided or used only under close supervision. Theoretically, concomitant use might increase the risk for stimulant adverse effects.

Full Caffeine + Ephedrine, Guaifenesin, Phenobarbital, Theophylline answer

Can you take Coffee with Ephedrine, Guaifenesin, Phenobarbital, Theophylline?

Major Use real caution — this is a major-rated interaction, generally best avoided or used only under close supervision. Theoretically, concomitant use might increase the risk of stimulant adverse effects.

Full Coffee + Ephedrine, Guaifenesin, Phenobarbital, Theophylline answer

Can you take Green Tea with Ephedrine, Guaifenesin, Phenobarbital, Theophylline?

Major Use real caution — this is a major-rated interaction, generally best avoided or used only under close supervision. Theoretically, concomitant use might increase the risk for stimulant adverse effects.

Full Green Tea + Ephedrine, Guaifenesin, Phenobarbital, Theophylline answer

Can you take Saffron with Ephedrine, Guaifenesin, Phenobarbital, Theophylline?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, concomitant use of saffron and CNS depressants might have additive sedative effects.

Full Saffron + Ephedrine, Guaifenesin, Phenobarbital, Theophylline answer

Can you take Wild Lettuce with Ephedrine, Guaifenesin, Phenobarbital, Theophylline?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, concomitant use with drugs with sedative effects might cause additive therapeutic effects and adverse effects.

Full Wild Lettuce + Ephedrine, Guaifenesin, Phenobarbital, Theophylline answer

Can you take Yin Chen with Ephedrine, Guaifenesin, Phenobarbital, Theophylline?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, yin chen might enhance the therapeutic and adverse effects of other CNS depressants.

Full Yin Chen + Ephedrine, Guaifenesin, Phenobarbital, Theophylline answer

Can you take Yohimbe with Ephedrine, Guaifenesin, Phenobarbital, Theophylline?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, taking yohimbe with stimulant drugs can have additive effects.

Full Yohimbe + Ephedrine, Guaifenesin, Phenobarbital, Theophylline answer

Can you take Zizyphus with Ephedrine, Guaifenesin, Phenobarbital, Theophylline?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, zizyphus might cause additive sedative effects when taken with CNS depressants.

Full Zizyphus + Ephedrine, Guaifenesin, Phenobarbital, Theophylline answer

Can you take Lavender with Ephedrine, Guaifenesin, Phenobarbital, Theophylline?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, lavender might potentiate the therapeutic effects and adverse effects of CNS depressants.

Full Lavender + Ephedrine, Guaifenesin, Phenobarbital, Theophylline answer

Can you take Thyroid Extract with Ephedrine, Guaifenesin, Phenobarbital, Theophylline?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Food and medications can interfere with thyroid hormone absorption.

Full Thyroid Extract + Ephedrine, Guaifenesin, Phenobarbital, Theophylline answer

Can you take Adenosine with Ephedrine, Guaifenesin, Phenobarbital, Theophylline?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Methylxanthines are competitive antagonists of adenosine and can block its pharmacologic effects.

Full Adenosine + Ephedrine, Guaifenesin, Phenobarbital, Theophylline answer

Can you take Agar with Ephedrine, Guaifenesin, Phenobarbital, Theophylline?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Agar forms a thick gel, which may disrupt the absorption of nutrients and medications.

Full Agar + Ephedrine, Guaifenesin, Phenobarbital, Theophylline answer

Can you take Algin with Ephedrine, Guaifenesin, Phenobarbital, Theophylline?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Theoretically, algin can alter the absorption of oral drugs.

Full Algin + Ephedrine, Guaifenesin, Phenobarbital, Theophylline answer

Can you take Aloe with Ephedrine, Guaifenesin, Phenobarbital, Theophylline?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Theoretically, aloe might decrease the levels and clinical effects of CYP1A2 substrates.

Full Aloe + Ephedrine, Guaifenesin, Phenobarbital, Theophylline answer

Can you take Atractylodes with Ephedrine, Guaifenesin, Phenobarbital, Theophylline?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Theoretically, atractylodes might decrease the levels of CYP1A2 substrates.

Full Atractylodes + Ephedrine, Guaifenesin, Phenobarbital, Theophylline answer

Can you take Bael with Ephedrine, Guaifenesin, Phenobarbital, Theophylline?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Bael extract and its constituent marmesinin inhibited cytochrome P450 1A2 (CYP1A2) activity in vitro.

Full Bael + Ephedrine, Guaifenesin, Phenobarbital, Theophylline answer

Can you take Beet with Ephedrine, Guaifenesin, Phenobarbital, Theophylline?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Theoretically, beet might decrease the levels and clinical effects of CYP1A2 substrates.

Full Beet + Ephedrine, Guaifenesin, Phenobarbital, Theophylline answer

Can you take Black Psyllium with Ephedrine, Guaifenesin, Phenobarbital, Theophylline?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Theoretically, psyllium might increase, decrease, or have no effect on the absorption of oral drugs.

Full Black Psyllium + Ephedrine, Guaifenesin, Phenobarbital, Theophylline answer

Can you take Blond Psyllium with Ephedrine, Guaifenesin, Phenobarbital, Theophylline?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Theoretically, psyllium might increase, decrease, or have no effect on the absorption of oral drugs.

Full Blond Psyllium + Ephedrine, Guaifenesin, Phenobarbital, Theophylline answer

Can you take Broccoli Sprout with Ephedrine, Guaifenesin, Phenobarbital, Theophylline?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Theoretically, broccoli sprout might reduce levels and effects of drugs metabolized by CYP1A2.

Full Broccoli Sprout + Ephedrine, Guaifenesin, Phenobarbital, Theophylline 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) Ephedrine, Guaifenesin, Phenobarbital, Theophylline is classified into the pharmacology categories it belongs to, (2) every supplement interaction documented against any of those categories is inherited by Ephedrine, Guaifenesin, Phenobarbital, Theophylline, 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.

Ephedrine, Guaifenesin, Phenobarbital, Theophylline sits in 16 interaction categories. Open any one to see what the group means:

Cytochrome P450 1A2 (Cyp1A2) Substrates 79 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.

79 of the supplement ingredients on this page reach Ephedrine, Guaifenesin, Phenobarbital, Theophylline through this category.

Cns Depressants 78 ingredients

Central-nervous-system depressants. Sedating supplements can intensify drowsiness and slowed reactions when combined.

78 of the supplement ingredients on this page reach Ephedrine, Guaifenesin, Phenobarbital, Theophylline 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 Ephedrine, Guaifenesin, Phenobarbital, Theophylline through this category.

Theophylline 27 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.

27 of the supplement ingredients on this page reach Ephedrine, Guaifenesin, Phenobarbital, Theophylline through this category.

Cytochrome P450 3A4 (Cyp3A4) Inducers 19 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.

19 of the supplement ingredients on this page reach Ephedrine, Guaifenesin, Phenobarbital, Theophylline 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 Ephedrine, Guaifenesin, Phenobarbital, Theophylline through this category.

Phenobarbital (Luminal) 16 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.

16 of the supplement ingredients on this page reach Ephedrine, Guaifenesin, Phenobarbital, Theophylline through this category.

Ephedrine 14 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.

14 of the supplement ingredients on this page reach Ephedrine, Guaifenesin, Phenobarbital, Theophylline through this category.

Barbiturates 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 Ephedrine, Guaifenesin, Phenobarbital, Theophylline 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 Ephedrine, Guaifenesin, Phenobarbital, Theophylline through this category.

Methylxanthines 5 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.

5 of the supplement ingredients on this page reach Ephedrine, Guaifenesin, Phenobarbital, Theophylline through this category.

Cytochrome P450 2C9 (Cyp2C9) Inducers 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 Ephedrine, Guaifenesin, Phenobarbital, Theophylline through this category.

Cytochrome P450 2C19 (Cyp2C19) Inducers 2 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.

2 of the supplement ingredients on this page reach Ephedrine, Guaifenesin, Phenobarbital, Theophylline 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 Ephedrine, Guaifenesin, Phenobarbital, Theophylline through this category.

Cytochrome P450 1A2 (Cyp1A2) Substrates 1 ingredient

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.

1 of the supplement ingredient on this page reaches Ephedrine, Guaifenesin, Phenobarbital, Theophylline through this category.

Cytochrome P450 1A2 (Cyp1A2) Inducers 1 ingredient

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.

1 of the supplement ingredient on this page reaches Ephedrine, Guaifenesin, Phenobarbital, Theophylline through this category.

Related: does Ephedrine, Guaifenesin, Phenobarbital, Theophylline deplete any nutrients?

Ephedrine, Guaifenesin, Phenobarbital, Theophylline has 11 reported nutrient associations in the research literature — see the Ephedrine, Guaifenesin, Phenobarbital, Theophylline nutrient depletion report.

Check a real product

Take a Supplement Product? Check the Whole Bottle Against Ephedrine, Guaifenesin, Phenobarbital, Theophylline

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 Ephedrine, Guaifenesin, Phenobarbital, Theophylline.

Search a supplement product

Type a product name, brand, or UPC — smart search across our full catalog.

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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Prefer typing? The interaction checker looks up products by name too.

Products that contain Ephedrine, Guaifenesin, Phenobarbital, Theophylline-interacting ingredients

Real supplements from the NIH label database that contain the top interacting ingredients on this page — each one is worth a full label check before combining with Ephedrine, Guaifenesin, Phenobarbital, Theophylline.

Standardized St. John's Wort 600 mg by Nature's Truth contains St. John's Wort St. John's Wort-IMT by SP Standard Process contains St. John's Wort St John's Wort Extract by SuperSmart contains St. John's Wort St John's Wort 400 mg by Signature Supplements contains St. John's Wort
Pharmacist Counseling Corner

Ephedrine, Guaifenesin, Phenobarbital, Theophylline & Supplements: Common Questions

What supplements interact with Ephedrine, Guaifenesin, Phenobarbital, Theophylline?
In our interaction database, 237 supplement and herbal ingredients have an interaction with Ephedrine, Guaifenesin, Phenobarbital, Theophylline on file — 22 rated major, 177 moderate, and 38 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: Beer, St. John's Wort, Wine.
Which Ephedrine, Guaifenesin, Phenobarbital, Theophylline supplement interactions are the most serious?
Focus on the major group: Beer, St. John's Wort, Wine, 1,4-butanediol and Activated Charcoal, 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 Ephedrine, Guaifenesin, Phenobarbital, Theophylline?
That depends entirely on which supplement. The honest answer for Ephedrine, Guaifenesin, Phenobarbital, Theophylline 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 Mudrane GG have the same supplement interactions as Ephedrine, Guaifenesin, Phenobarbital, Theophylline?
Yes — Mudrane GG all contain Ephedrine, Guaifenesin, Phenobarbital, Theophylline, 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.
Does Ephedrine, Guaifenesin, Phenobarbital, Theophylline deplete any vitamins or nutrients?
It might — Ephedrine, Guaifenesin, Phenobarbital, Theophylline has 11 reported nutrient-depletion associations in the research literature, which is a different question from interactions: instead of a supplement changing the drug, the drug may lower a nutrient over time. See the Ephedrine, Guaifenesin, Phenobarbital, Theophylline nutrient depletion report for the specifics and what to discuss with your pharmacist.
What about Ephedrine, Guaifenesin, Phenobarbital, Theophylline and my other medications?
This page covers Ephedrine, Guaifenesin, Phenobarbital, Theophylline against supplements and herbal ingredients. Checking Ephedrine, Guaifenesin, Phenobarbital, Theophylline 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 October 2, 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.