Drug & supplement interaction

Levilactobacillus Brevis + Doxepin

Doxepin brand names: Sinequan, Doxepin, Zonalon.

No Known Interaction
Medically reviewed by · Updated July 2026 · Pair last verified Sep 20, 2026
The bottom line No known interaction

We found no known interaction between Levilactobacillus Brevis and Doxepin 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.

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Interaction report

Levilactobacillus Brevis and Doxepin

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 Doxepin and Levilactobacillus Brevis 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.

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.

Levilactobacillus Brevis safety at a glance

Levilactobacillus... overall Use caution Generally well tolerated in healthy people, but people who are seriously ill or immunocompromised should be cautious.
Pregnancy Use caution Not enough reliable safety data; talk to your doctor before using during pregnancy.
Breastfeeding Use caution Limited data on use while breastfeeding; check with your doctor or pharmacist first.

Safety guidance is general; always confirm with your pharmacist or doctor for your situation.

Still wondering about combining Doxepin and Levilactobacillus Brevis? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
How we checked

Why No Interaction Is Listed for Doxepin

Interactions in our licensed database are recorded against drug classes, not just single drug names. Doxepin is filed under 10 classifications — including tricyclic antidepressants (tcas), antidepressant drugs, qt interval-prolonging drugs. Levilactobacillus Brevis has documented interactions with 1 drug class — the most serious being antibiotic drugs (moderate) — and none of Doxepin’s classifications are among them.

Classification data comes from our licensed Natural Medicines dataset. A medication can belong to classes beyond those recorded there, so this describes how the check was run — it is not a safety guarantee.

Keep it in perspective

Levilactobacillus Brevis Does Interact With Other Medications

Levilactobacillus Brevis has 182 moderate known drug interactions in our database — Doxepin isn’t one of them. If you take anything else, check it against the full list below.

Moderate 182 No known interaction 2,648 (incl. Doxepin)
Taking anything else?

Check Another of Your Medications Against Levilactobacillus Brevis

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

What to actually watch for

What Levilactobacillus Brevis Itself Has Been Linked To

This is not an interaction — nothing below involves Doxepin. It is the side-effect record for Levilactobacillus Brevis on its own, from the licensed Natural Medicines monograph. If something new turns up after you add Levilactobacillus Brevis, this list is the first place to look. One entry is worth acting on rather than waiting out — marked below.

  • A higher chance of infection Worth acting on Additional detail

    “Since Levilactobacillus brevis preparations contain live and active microorganisms, there is some concern that they might cause pathogenic infection in some patients. Some lactobacilli species have been isolated in cases of bacteremia, sepsis, splenic abscess, endocarditis, necrotizing fasciitis, pancreatic necrosis, and meningoencephalitis.”

    Levilactobacillus Brevis · Natural Medicines adverse-effect record, reported in sepsis.

    1 source cited
    1. 107543. Rossi F, Amadoro C, Gasperi M, Colavita G. Lactobacilli infection case reports in the last three years and safety implications. Nutrients. 2022;14(6):1178. PubMed
  • Diarrhea / Nausea Additional detail

    “Orally, taking Levilactobacillus brevis has rarely caused nausea, abdominal fullness, or mild diarrhea, in clinical research.”

    Levilactobacillus Brevis · Natural Medicines adverse-effect record, reported in diarrhea.

    2 sources cited
    1. 110959. Tasli L, Mat C, De Simone C, Yazici H. Lactobacilli lozenges in the management of oral ulcers of Behçet's syndrome. Clin Exp Rheumatol. 2006;24(5 Suppl 42):S83-6.
    2. 110962. Silva NLNV, Della Bona A, Cardoso M, et al. Lactobacillus brevis CD2 attenuates traumatic oral lesions induced by fixed orthodontic appliance: A randomized phase 2 trial. Orthod Craniofac Res. 2021;24(3):379-385.

Everything above comes from the Natural Medicines adverse-effect record for Levilactobacillus Brevis — expand a row for the licensed statement it rests on. We haven’t matched Doxepin to its FDA label in our system yet, so we can’t compare its own side-effect list here — the leaflet that comes with your prescription is the authoritative list for Doxepin.

Overlapping uses

What Doxepin Is Prescribed For, and What Levilactobacillus Brevis Has Been Studied For

These two come up together because they touch the same health topic — not because they do the same job. Doxepin is a prescription medicine with approved uses on its FDA label. Levilactobacillus Brevis is a supplement: what follows is what researchers have looked at it for, and how strong that evidence is.

Doxepin is prescribed for: This product is marketed to temporarily relieve occasional trouble sleeping when it's brought on by anxiety, restlessness, stress, or sensitivity to caffeine. It is a homeopathic remedy — meaning its claims are based on traditional homeopathic practice, not accepted medical evidence, and it has not been evaluated by the FDA for effectiveness.

Levilactobacillus Brevis has been studied for:

  • Insomnia studied, not established Levilactobacillus Brevis has been studied for this. Natural Medicines rates the evidence: Insufficient Reliable Evidence To Rate Read what the research shows

    Levilactobacillus Brevis for insomnia

    It is unclear if oral Levilactobacillus brevis is beneficial for insomnia.

Effectiveness ratings and the research summaries above are the verbatim record from the Natural Medicines database, which grades evidence from “Effective” down to “Insufficient Reliable Evidence To Rate”. A rating below the top of that scale means researchers have looked at it — not that it works, and never that it can stand in for a prescribed medicine. Do not stop or replace Doxepin on your own; if you are taking Levilactobacillus Brevis for the same health topic, tell your prescriber, especially if the medicine is being adjusted to a target.

Everything else you take

See Every Supplement That Interacts With Doxepin

This page covers Levilactobacillus Brevis only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Doxepin page lists 186 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: 1,4-butanediol (major), Activated Charcoal (major), American Hellebore (major), Arsenic (major) and Beer (major).

By severity: 15 major · 145 moderate · 26 minor.

From our pharmacist’s overview on the Doxepin page

“Doxepin is a sedating tricyclic prescribed for depression, anxiety, and often sleep itself, and the people taking it tend to shop the same shelf where the trouble sits. Of the 186 supplements on file, 78 deepen its drowsiness, with alcohol (beer and wine carry major, well-documented ratings) and kava the clearest examples, and I would…”

Reviewed by 2 · Jul 18, 2026

Open the Doxepin interaction page

How much people look this up

Where Levilactobacillus Brevis and Doxepin 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 Levilactobacillus Brevis
Steady interest

#1,092 of 1,452 supplements looked up here in the last 7 days

29 days ago today
Medication Doxepin
Steady interest

#1,468 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.

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 Levilactobacillus Brevis reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The Levilactobacillus Brevis and Doxepin 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.
Data structure & sourcing designed and verified by .
Supplement

About Levilactobacillus Brevis

What is Levilactobacillus Brevis?

  • Digestive health
  • Gut microbiome support
  • Immune support
  • Oral and dental health
  • Vaginal health

Levilactobacillus brevis (formerly Lactobacillus brevis) is a lactic acid bacterium found in fermented foods like sauerkraut, pickles, and kimchi, and is used as a probiotic. Early research suggests possible benefits for gut and immune health, but strong human evidence is still limited. It is generally well tolerated in healthy people, but anyone with a weakened immune system or serious illness should talk to a doctor first.

Levilactobacillus brevis · Lactobacillaceae · Whole live bacteria (probiotic strain) · Capsules, tablets, powders, fermented foods, and combination probiotic products

An interaction check asks whether these two react with each other — it does not ask whether Levilactobacillus Brevis is a good idea for someone in your situation. Here is what our Levilactobacillus Brevis record says about it on its own.

Levilactobacillus Brevis: dosing

There is no official standardized dose for Levilactobacillus brevis. Probiotic amounts are usually measured in colony-forming units (CFU), and products vary widely in strength and strain.The best approach is to follow the directions on the product label. Doses are often taken once or twice daily, sometimes with food.

From our Levilactobacillus Brevis monograph — the full record covers uses, side effects and every documented interaction.

Read the full Levilactobacillus Brevis monograph & all interactions
Medication

About Doxepin (Insomnia)

What Is Doxepin (Insomnia) Used For?

Brand names: Sinequan, Doxepin, Zonalon

This product is marketed to temporarily relieve occasional trouble sleeping when it's brought on by anxiety, restlessness, stress, or sensitivity to caffeine.

It is a homeopathic remedy — meaning its claims are based on traditional homeopathic practice, not accepted medical evidence, and it has not been evaluated by the FDA for effectiveness.

Most-Reported Side Effects for Doxepin

From FAERS, the FDA’s public side-effect reporting system (12,553 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.

Toxicity to various agents 988 reports
Completed suicide 828 reports
Fatigue 793 reports
Nausea 679 reports
Headache 642 reports
See full Doxepin (Insomnia) drug information
Keep checking

Other Drugs & Levilactobacillus Brevis

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

0Major
182Moderate
0Minor
2,647No known interaction
182 Moderate 2,647 No interaction
Moderate

182 interactions

Showing 60 of 182 moderate interactions — see all 182 on the Levilactobacillus Brevis page.

No interaction 2,647 drugs checked — show the list

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

Showing the 60 most looked-up of 2,647 medications checked with no known interaction — see the full Levilactobacillus Brevis list.

See the full Levilactobacillus Brevis interactions page
See every supplement checked against Doxepin, ranked by severity
Evidence & sources

Levilactobacillus Brevis References

The 4 references that drive our Levilactobacillus Brevis 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.

  1. Pierce A. The American Pharmaceutical Association Practical Guide to Natural Medicines. New York: The Stonesong Press, 1999:19.
  2. Rossi F, Amadoro C, Gasperi M, Colavita G. Lactobacilli infection case reports in the last three years and safety implications. Nutrients. 2022;14(6):1178. PubMed
  3. Tasli L, Mat C, De Simone C, Yazici H. Lactobacilli lozenges in the management of oral ulcers of Behçet's syndrome. Clin Exp Rheumatol. 2006;24(5 Suppl 42):S83-6.
  4. Silva NLNV, Della Bona A, Cardoso M, et al. Lactobacillus brevis CD2 attenuates traumatic oral lesions induced by fixed orthodontic appliance: A randomized phase 2 trial. Orthod Craniofac Res. 2021;24(3):379-385.

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.

Pharmacist Counseling Corner

Taking Levilactobacillus Brevis and Doxepin Together: Common Questions

Is it safe to take Levilactobacillus Brevis with Doxepin?
We do not list a known interaction between Levilactobacillus Brevis and Doxepin. That does not guarantee the combination is risk-free, so confirm with your pharmacist or doctor — especially if you take other medications or have a health condition.
Are Levilactobacillus Brevis and Doxepin used for the same thing?
They overlap in purpose, which usually means the real question is whether you need both rather than whether they are safe together. This page lists the shared uses and how strong the evidence is for Levilactobacillus Brevis in each. That is a conversation for your prescriber, especially if Doxepin is being adjusted to a target.
How was the Levilactobacillus Brevis and Doxepin combination checked?
Interactions in our licensed database are recorded against drug classes. Doxepin is filed under 10 classifications, and Levilactobacillus Brevis has documented interactions with 1 drug class — none of Doxepin's classifications are among them. A medication can belong to classes beyond those recorded in our dataset, so this describes how the check was run rather than guaranteeing safety.
Does Levilactobacillus Brevis interact with any other medications?
Yes. Levilactobacillus Brevis has 182 documented drug interactions in our database — Doxepin is simply not one of them. If you take anything else, it is worth checking each one; they are all listed on this page.
Does Doxepin interact with any supplements?
Yes. Doxepin has documented interactions with 186 supplements in our database — Levilactobacillus Brevis is not one of them. The Doxepin interaction page linked on this page lists every one, ranked by severity.

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

Where next

Keep Exploring

Levilactobacillus Brevis monograph Uses, safety profile, and every drug interaction in one place Doxepin (Insomnia) drug information The full plain-English guide to this medication Doxepin supplement interactions Every supplement checked against Doxepin, 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 References The 4 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Doxepin and Levilactobacillus Brevis?

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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.