Drug & supplement interaction

Akkermansia + Promethazine, Pseudoephedrine

Promethazine, Pseudoephedrine brand name: Phenergan D.

No Known Interaction
Medically reviewed by · Updated July 2026 · Pair last verified Sep 13, 2026
The bottom line No known interaction

We found no known interaction between Akkermansia and Promethazine, Pseudoephedrine 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

Akkermansia and Promethazine, Pseudoephedrine

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 Promethazine, Pseudoephedrine and Akkermansia 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.

Worth understanding: our licensed dataset holds no drug-interaction record for Akkermansia at all — not against Promethazine, Pseudoephedrine, and not against any other medication we track. This verdict therefore rests on the absence of any recorded data, not on research that looked at this combination and found nothing. We cannot rule an interaction out.

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.

Akkermansia safety at a glance

Akkermansia overall Use caution Small human studies suggest short-term use is generally well tolerated, but long-term safety data are limited.
Pregnancy Avoid There is not enough safety information, so it is best to avoid during pregnancy.
Breastfeeding Avoid There is not enough safety information, so it is best to avoid while breastfeeding.

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

Still wondering about combining Promethazine, Pseudoephedrine and Akkermansia? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
Everything else you take

See Every Supplement That Interacts With Promethazine, Pseudoephedrine

This page covers Akkermansia only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Promethazine, Pseudoephedrine page lists 116 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Ephedra (major), Henbane (major), Peyote (major) and Rauvolfia Vomitoria (major).

By severity: 7 major · 93 moderate · 16 minor.

From our pharmacist’s overview on the Promethazine, Pseudoephedrine page

“Phenergan D combines a sedating antihistamine, promethazine, with the decongestant stimulant pseudoephedrine, and its supplement list pulls hard in both directions, so this is one to treat with genuine care. The biggest cluster, from everyday caffeine sources like coffee and cola nut up to ephedra, stacks extra stimulation on the pseud…”

Reviewed by 2 · Jul 18, 2026

Open the Promethazine, Pseudoephedrine interaction page

How much people look this up

Where Akkermansia and Promethazine, Pseudoephedrine 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 Akkermansia
Top half

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

29 days ago today
Medication Promethazine, Pseudoephedrine
Top 25%

#457 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. Akkermansia is not yet covered by that licensed database, so its write-up cites publicly available medical sources directly (see the references below).
  • Citation library: 103,510 references behind our interaction content, 65,311 of them resolved to verified PubMed/DOI sources. See every Akkermansia reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 13, 2026. The Akkermansia and Promethazine, Pseudoephedrine 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 Akkermansia

What is Akkermansia?

  • Gut health support
  • Metabolic health and blood sugar
  • Weight management
  • Gut lining (barrier) support

Akkermansia muciniphila is a gut bacterium sold as a next-generation probiotic. Early research in animals and small human studies looks promising for metabolic and gut health, but the evidence is still limited and long-term safety is not fully known. Talk with your pharmacist or doctor before trying it, especially if you have a weakened immune system.

Akkermansia muciniphila · Akkermansiaceae · Whole bacterial cells (live or pasteurized) · Capsules, powders (probiotic supplements)

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

Akkermansia: dosing

There is no official, standardized dose for Akkermansia muciniphila. Doses are usually measured in colony-forming units (CFU) or by the amount of bacterial cells, and these vary from product to product.The best approach is to follow the directions on the product label and not take more than recommended. If you notice ongoing digestive problems, stop and get medical advice.

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

Read the full Akkermansia monograph & all interactions
Keep checking

Other Drugs & Akkermansia

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

0Major
0Moderate
0Minor
2,829No known interaction
2,829 No interaction
No interaction 2,829 drugs checked — show the list

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

Showing the 60 most looked-up of 2,829 medications checked with no known interaction — see the full Akkermansia list.

See the full Akkermansia interactions page
See every supplement checked against Promethazine, Pseudoephedrine, ranked by severity
Evidence & sources

Akkermansia References

The 2 sources that drive our Akkermansia monograph — publicly available pages from reputable medical and government organizations. Every link was verified to work before publishing. Akkermansia is not covered by the licensed Natural Medicines interaction database, so its page cites these public sources directly.

  1. Probiotics: What You Need To Know — NIH NCCIH Source
  2. Probiotics — MedlinePlus Source

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 Akkermansia and Promethazine, Pseudoephedrine Together: Common Questions

Is it safe to take Akkermansia with Promethazine, Pseudoephedrine?
We do not list a known interaction between Akkermansia and Promethazine, Pseudoephedrine. 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.
Does Promethazine, Pseudoephedrine interact with any supplements?
Yes. Promethazine, Pseudoephedrine has documented interactions with 116 supplements in our database — Akkermansia is not one of them. The Promethazine, Pseudoephedrine 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

Akkermansia monograph Uses, safety profile, and every drug interaction in one place Promethazine, Pseudoephedrine supplement interactions Every supplement checked against Promethazine, Pseudoephedrine, 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 2 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Promethazine, Pseudoephedrine and Akkermansia?

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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.