Drug & supplement interaction

Dolomite + Doxycycline monohydrate

Doxycycline monohydrate brand name: Erfacea.

Moderate Interaction
Medically reviewed by · Updated September 2026
The bottom line Moderate

Dolomite has a moderate interaction with Doxycycline monohydrate. Theoretically, the calcium and magnesium in dolomite might decrease the absorption of tetracycline antibiotics.

Read the full interaction report
SeverityModerate
LikelihoodProbable
EvidenceD
What do Severity, Likelihood & Evidence mean?
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Interaction report

Dolomite and Doxycycline monohydrate

Here is the interaction we found between these two, with the evidence behind it.

Moderate

TETRACYCLINE ANTIBIOTICS

Why this applies to Doxycycline monohydrate

Doxycycline monohydrate falls under TETRACYCLINE ANTIBIOTICS — the group Dolomite interacts with.

Theoretically, the calcium and magnesium in dolomite might decrease the absorption of tetracycline antibiotics.
Dolomite contains calcium and magnesium, which can bind to tetracyclines in the gut. To avoid this interaction, advise patients to take oral tetracyclines at least 2 hours before or 4-6 hours after dolomite.
Severity Moderate Likelihood Probable Evidence D

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..

Dr. Brian Staiger, PharmD, BCPS
Dr. Brian Staiger explains PharmD, Clinical Pharmacist

Here's the short version: doxycycline and the minerals in dolomite don't get along in your stomach. The calcium and magnesium can grab onto the antibiotic and form clumps your gut can't absorb well. The worry isn't extra side effects, it's the opposite. You may end up absorbing less of your doxycycline, which can leave the antibiotic too weak to fully clear whatever infection or skin condition you're treating.

The good news is this is easy to manage with timing. A common approach is to take doxycycline at least 2 hours before, or 4 to 6 hours after, your dolomite. This is based on how these drugs behave rather than hard trial data, but it's a sensible habit. Run your exact schedule by your pharmacist to be safe.

Contact Dr. Brian directly if you have additional questions on this interaction
References
  1. Martindale W. Martindale the Extra Pharmacopoeia. Pharmaceutical Press, 1999.

What These Ratings Mean

Every interaction above is graded three ways — here’s the key to each label.

Severity how clinically significant the interaction is
Major

Clinically significant. Avoid the combination, or use only under close professional supervision.

Moderate

Usually worth avoiding or managing — may need monitoring, a dose change, or timing apart.

Minor

Generally not serious. Be aware of it and mention it to your pharmacist.

Likelihood how strong the evidence is that the interaction actually happens in people
  • LikelyWell-controlled human studies have demonstrated the likely existence of this interaction.
  • ProbableInteraction 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.
  • PossibleInteraction 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.
  • UnlikelyInteraction has been demonstrated in animal or in lab research but has been shown not to occur in humans.
Evidence the quality of the studies behind the rating (graded A–D)
  • AHigh-quality meta-analysis (quantitative systematic review).
  • BCase-control study.
  • CConsensus.
  • DAnecdotal evidence.

These ratings are for information only. Never start, stop, or otherwise change your therapy before speaking with your provider.

Keep it in perspective

Dolomite Also Interacts With Other Medications

Dolomite has 56 major, 71 moderate known drug interactions in our database — the Doxycycline monohydrate one above is one of them. If you take anything else, check it against the full list below.

Major 56 Moderate 71 No known interaction 2,703 (incl. Doxycycline monohydrate)
Taking anything else?

Check Another of Your Medications Against Dolomite

Covers the 2,830 medications we’ve checked against Dolomite. Pick one to open its full report.

Everything else you take

See Every Supplement That Interacts With Doxycycline monohydrate

This page covers Dolomite only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Doxycycline monohydrate page lists 166 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Asarabacca (major), Beer (major), Oleander (major) and Siberian Cocklebur (major).

Open the Doxycycline monohydrate interaction page

One more smart check

Taking Dolomite as Part of a Dietary Supplement Product? Check It for Interactions

We hold 3 real supplement products containing Dolomite, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Dolomite. Your product may carry other ingredients that interact with Doxycycline monohydrate too, on top of Dolomite — and those would not show on this page. Find your product and we’ll check every ingredient on its label:

How much people look this up

Where Dolomite and Doxycycline monohydrate 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.

Supplement Dolomite
Steady interest

#805 of 1,452 supplements looked up here in the last 7 days

29 days ago today
Medication Doxycycline monohydrate
Top half

#1,202 of 2,830 medications looked up here in the last 7 days

29 days ago today

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.

Supplement

About Dolomite

What is Dolomite?

Dolomite
  • Source of calcium
  • Source of magnesium
  • Bone health support
  • Antacid for heartburn
  • Mineral supplementation

Dolomite is a natural mineral that provides both calcium and magnesium. However, many health authorities advise against using it because dolomite products have been found to contain heavy metals like lead, arsenic, and mercury, and safer, better-tested calcium and magnesium supplements are widely available.

Read the full Dolomite monograph & all interactions
Keep checking

Other Drugs & Dolomite

Browse every other medication we’ve checked against Dolomite — both the ones with a known interaction and the ones without. Select any drug for the full detail.

56Major
71Moderate
0Minor
2,702No known interaction
56 Major 71 Moderate 2,702 No interaction
Major

56 interactions

Moderate

71 interactions

Showing 60 of 71 moderate interactions — see all 71 on the Dolomite page.

No interaction 2,702 drugs checked — show the list

We also checked Dolomite against these medications and found no known interaction in our sources. Open any page to confirm.

Showing the 60 most looked-up of 2,702 medications checked with no known interaction — see the full Dolomite list.

See the full Dolomite interactions page
See every supplement checked against Doxycycline monohydrate, ranked by severity
Sources

Sources & How We Checked

Interaction details are evidence-graded and sourced from the Natural Medicines database. The medication overview comes from MedlinePlus.

Content is written and reviewed by licensed HelloPharmacist pharmacists. See our data sources and editorial standards for how this information is built and checked.

Parts of this content are provided by the Therapeutic Research Center, LLC.

DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.

© 2021 Therapeutic Research Center, LLC

Keep exploring
Dolomite monograph › Uses, safety, and every drug interaction in one place Doxycycline monohydrate supplement interactions › Every supplement checked against Doxycycline monohydrate, ranked by severity Supplement interaction checker › Check any supplement or product against your medications Browse medications A–Z › Every drug we've checked against herbs & supplements Ask a pharmacist › Free, personal answer from our licensed team
Pharmacist Counseling Corner

Taking Dolomite and Doxycycline monohydrate Together: Common Questions

Can you take Dolomite with Doxycycline monohydrate?
There is a moderate interaction, so it may be acceptable with monitoring or timing changes — but check with your pharmacist first. Read the full details on this page and confirm with your pharmacist before combining them.
How serious is the Dolomite and Doxycycline monohydrate interaction?
We rate it Moderate. This combination may require monitoring, a dose adjustment, or separating the times you take each one. Consult your pharmacist before using them together.

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

Still Have a Question About Doxycycline monohydrate and Dolomite?

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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.