Medication interaction hub

What Supplements Interact with Doxycycline?

Doxycycline brand names: Vibra-Tabs, Vibramycin, Doryx, Monodox, Doxycin, and others. Every interaction below applies to the brands too.

166 Interactions 7 Major 139 Moderate 20 Minor
Curated & coded by · Clinical Pharmacist · Updated September 15, 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 Doxycycline? 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 Doxycycline 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.

St. John's wort is the supplement I would flag first for anyone on doxycycline (Vibramycin, Doryx), because it can speed the antibiotic out of the body and leave an infection undertreated. It is one of seven major-rated entries among the 166 supplement and herbal ingredients on file, a list I treat with real caution. Heavy alcohol adds liver strain, and kidney-stressing herbs like Siberian cocklebur also rate major.

Most of the 139 moderate interactions are milder versions of the same themes, with 20 minor entries at the low end. Calcium binds doxycycline in the gut, so take the antibiotic at least 2 hours before or 4 to 6 hours after a calcium supplement. Probiotics can be killed off if swallowed with the dose. And 20 photosensitizing ingredients, bergamot oil among them, add to the sun sensitivity doxycycline already causes, so cover up outdoors while taking both.

— , Clinical Pharmacist · July 18, 2026

Major 7 Moderate 139 Minor 20 No known interaction 1,286

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

Doxycycline: Top Interactions at a Glance

The Doxycycline 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 166 interacting ingredients — plus 1,286 more checked with no known interaction. See the complete ranked list.

Start here

The Most-Checked Doxycycline Combinations Today

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

Moderate Likelihood Probable Whey Protein + Doxycyclinei

Theoretically, whey protein might decrease tetracycline absorption.

Read the full interaction Moderate Likelihood Probable Iron + Doxycyclinei

Iron might decrease levels of tetracycline antibiotics by reducing their absorption.

Read the full interaction Moderate Likelihood Probable Magnesium + Doxycyclinei

Magnesium decreases absorption of tetracyclines.

Read the full interaction Moderate Likelihood Probable Zinc + Doxycyclinei

Zinc might reduce levels of tetracycline antibiotics.

Read the full interaction Moderate Likelihood Possible Quercetin + Doxycyclinei

Theoretically, concomitant use might alter the effects and adverse effects of P-glycoprotein substrates.

Read the full interaction Moderate Likelihood Possible Vitamin A + Doxycyclinei

Theoretically, taking high doses of vitamin A in combination with other potentially hepatotoxic drugs might increase the risk of liver disease.

Read the full interaction
The complete list

Every Supplement Checked Against Doxycycline

All 1,452 ingredients in our database, ranked by severity — 166 with a Doxycycline interaction on file and 1,286 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 Doxycycline?

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 Whey Protein with Doxycycline?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, whey protein might decrease tetracycline absorption.

Full Whey Protein + Doxycycline answer

Can you take Iron with Doxycycline?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Iron might decrease levels of tetracycline antibiotics by reducing their absorption.

Full Iron + Doxycycline answer

Can you take Magnesium with Doxycycline?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Magnesium decreases absorption of tetracyclines.

Full Magnesium + Doxycycline answer

Can you take Zinc with Doxycycline?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Zinc might reduce levels of tetracycline antibiotics.

Full Zinc + Doxycycline answer

Can you take Quercetin with Doxycycline?

Moderate Possibly, but carefully — this moderate-rated combination may need monitoring, a dose adjustment, or separated timing. Theoretically, concomitant use might alter the effects and adverse effects of P-glycoprotein substrates.

Full Quercetin + Doxycycline answer

Can you take Karaya Gum with Doxycycline?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Co-administration of oral drugs with bulk forming laxatives such as karaya gum may decrease, increase, or have no effect on the absorption o...

Full Karaya Gum + Doxycycline answer

Can you take Marshmallow with Doxycycline?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Theoretically, mucilage in marshmallow might impair absorption of oral drugs.

Full Marshmallow + Doxycycline answer

Can you take Puravive with Doxycycline?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Puravive contains quercetin.

Full Puravive + Doxycycline answer

Can you take Sesame with Doxycycline?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Theoretically, sesame might alter the transport of P-glycoprotein substrates.

Full Sesame + Doxycycline answer

Can you take Soy with Doxycycline?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Theoretically, antibiotics may decrease the activity of soy isoflavones.

Full Soy + Doxycycline answer

Can you take Uva Ursi with Doxycycline?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Theoretically, uva ursi may alter the levels of drugs transported by P-glycoprotein.

Full Uva Ursi + Doxycycline answer

Can you take Xanthan Gum with Doxycycline?

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

Full Xanthan Gum + Doxycycline answer

Can you take Asian Water Plantain with Doxycycline?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Studies on animals have shown that Asian water plantain extract, which contains triterpenoids, is generally safe at doses up to 1440 mg/kg o...

Full Asian Water Plantain + Doxycycline answer

Can you take Milk Thistle with Doxycycline?

Minor Usually — this is a minor-rated interaction, generally not clinically significant but worth mentioning to your pharmacist. Theoretically, milk thistle might increase the absorption of P-glycoprotein substrates.

Full Milk Thistle + Doxycycline answer

Can you take Siberian Cocklebur with Doxycycline?

Major Use real caution — this is a major-rated interaction, generally best avoided or used only under close supervision. Siberian cocklebur can adversely affect the kidney.

Full Siberian Cocklebur + Doxycycline answer

Can you take Activated Charcoal with Doxycycline?

Major Use real caution — this is a major-rated interaction, generally best avoided or used only under close supervision. Activated charcoal reduces systemic exposure to many drugs, including those that undergo enterohepatic recirculation, regardless of the rout...

Full Activated Charcoal + Doxycycline answer

Can you take Beer with Doxycycline?

Major Use real caution — this is a major-rated interaction, generally best avoided or used only under close supervision. Concomitant use of alcohol with hepatotoxic drugs may increase the risk of hepatotoxicity.

Full Beer + Doxycycline answer

Can you take Oleander with Doxycycline?

Major Use real caution — this is a major-rated interaction, generally best avoided or used only under close supervision. Theoretically, tetracycline antibiotics may increase the risk of oleander toxicity.

Full Oleander + Doxycycline answer

Can you take St. John's Wort with Doxycycline?

Major Use real caution — this is a major-rated interaction, generally best avoided or used only under close supervision. St.

Full St. John's Wort + Doxycycline answer

Can you take Wine with Doxycycline?

Major Use real caution — this is a major-rated interaction, generally best avoided or used only under close supervision. Concomitant use of alcohol with hepatotoxic drugs may increase the risk of hepatotoxicity.

Full Wine + Doxycycline 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) Doxycycline is classified into the pharmacology categories it belongs to, (2) every supplement interaction documented against any of those categories is inherited by Doxycycline, 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.

Doxycycline sits in 9 interaction categories. Open any one to see what the group means:

Hepatotoxic Drugs 38 ingredients

Medications with known liver considerations. Supplements that can stress the liver add to the load.

38 of the supplement ingredients on this page reach Doxycycline through this category.

P-Glycoprotein Substrates 37 ingredients

A drug-transport group: these medications are moved in and out of cells by the P-glycoprotein pump. Supplements that affect the pump can change how much of the drug is absorbed or kept in the body.

37 of the supplement ingredients on this page reach Doxycycline through this category.

Antibiotic Drugs 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 Doxycycline through this category.

Tetracycline Antibiotics 24 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.

24 of the supplement ingredients on this page reach Doxycycline 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 Doxycycline 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 Doxycycline through this category.

Nephrotoxic 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 Doxycycline 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 Doxycycline through this category.

Doxycycline (Vibramycin) 2 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.

2 of the supplement ingredients on this page reach Doxycycline through this category.

About Doxycycline

Doxycycline is a tetracycline antibiotic used to treat bacterial infections, acne, rosacea, and to prevent malaria and anthrax.

Generic name: Doxycycline  ·  Brand names: Vibra-Tabs, Vibramycin, Doryx, Monodox, Doxycin, Doxy, Doxylin, Doxy-D, Periostat, Doxycycline Injection, Oracea, Xyrosa, Acticlate, Acticlate Cap, Erfacea, Lymepak.

See the full Doxycycline drug information

Related: does Doxycycline deplete any nutrients?

Doxycycline has 84 reported nutrient associations in the research literature — see the Doxycycline nutrient depletion report.

Check a real product

Take a Supplement Product? Check the Whole Bottle Against Doxycycline

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 Doxycycline.

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Pharmacist Counseling Corner

Doxycycline & Supplements: Common Questions

What supplements interact with Doxycycline?
More than you might expect — 166 in total, though they are far from equal: 7 are rated major, 139 moderate, and 20 minor. The ranked list on this page puts the ones that genuinely matter first, and every entry opens a full report on that exact pair. The highest-ranked right now: Siberian Cocklebur, Activated Charcoal, Beer.
Which Doxycycline supplement interactions are the most serious?
Focus on the major group: Siberian Cocklebur, Activated Charcoal, Beer, Oleander and St. John's Wort, 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 Doxycycline?
Usually yes — most people on Doxycycline can take most supplements. The catch is the exceptions, and they aren't always the exotic ones (St. John's Wort trips up more prescriptions than almost anything sold next to it). Look up each ingredient you actually take in the list above, and treat "no known interaction" as a green-ish light, not a guarantee. Try the label scanner or the interaction checker.
Do brands like Vibra-Tabs have the same supplement interactions as Doxycycline?
Yes — Vibra-Tabs, Vibramycin, Doryx, Monodox, Doxycin and other brands all contain Doxycycline, 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 Doxycycline deplete any vitamins or nutrients?
It might — Doxycycline has 84 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 Doxycycline nutrient depletion report for the specifics and what to discuss with your pharmacist.
What about Doxycycline and my other medications?
This page covers Doxycycline against supplements and herbal ingredients. Checking Doxycycline 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, or read the full Doxycycline drug information.

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 15, 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.