Drug & supplement interaction

Black Mulberry + Trimethoprim

Trimethoprim brand names: Proloprim, Trimpex.

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 Black Mulberry and Trimethoprim 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. Additionally, although there is no interaction, the two are separately associated with some of the same side effects, which would make a new symptom harder to attribute to one or the other.

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Interaction report

Black Mulberry and Trimethoprim

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 Trimethoprim and Black Mulberry 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.

Black Mulberry safety at a glance

Black Mulberry overall Use caution The fruit is safe as food, but concentrated supplement doses are less studied.
Pregnancy Use caution Eating the fruit as food is likely fine, but avoid concentrated extracts unless your doctor approves.
Breastfeeding Use caution Fruit as food is likely fine, but there is little safety data on supplement doses.

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

Still wondering about combining Trimethoprim and Black Mulberry? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
How we checked

Why No Interaction Is Listed for Trimethoprim

Interactions in our licensed database are recorded against drug classes, not just single drug names. Trimethoprim is filed under 4 classifications — including qt interval-prolonging drugs, antibiotic drugs, oral drugs. Black Mulberry has documented interactions with 2 drug classes — the most serious being antidiabetes drugs (moderate) and midazolam (versed) (moderate) — and none of Trimethoprim’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

Black Mulberry Does Interact With Other Medications

Black Mulberry has 87 moderate known drug interactions in our database — Trimethoprim isn’t one of them. If you take anything else, check it against the full list below.

Moderate 87 No known interaction 2,743 (incl. Trimethoprim)
Taking anything else?

Check Another of Your Medications Against Black Mulberry

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

What to actually watch for

No Interaction Found — But Data Suggests Black Mulberry and Trimethoprim May Share a Side Effect

This is not an interaction. Neither one changes how your body handles the other, and nothing here says they react together. What our sources do show is that each has separately been linked to the effects below — so taking both can make those effects more likely to turn up, and harder to pin on one or the other if they do.

  • A skin rash reported in 5.3% of FDA reports for Trimethoprim Additional detail

    Black Mulberry

    “Topically, black mulberry leaf may cause contact dermatitis. A case of lichenoid contact dermatitis was reported in a 68-year-old male who came into contact with black mulberry leaves while picking black mulberries.”

    Black Mulberry · Natural Medicines adverse-effect record, reported in dermatitis.

    1 source cited
    1. 105799. Navarro-Triviño FJ, Jadczak P, Llamas-Molina JM, Ruiz-Villaverde R. Lichenoid contact dermatitis caused by Morus nigra L. Contact Dermatitis 2021;84(6):484-486.

    Trimethoprim

    Listed in the ADVERSE REACTIONS section of the FDA label for Trimethoprim, and in voluntary FDA adverse-event reports. Read the label on DailyMed ›

Effects for Trimethoprim come from the ADVERSE REACTIONS section of its FDA label; effects for Black Mulberry come from the Natural Medicines adverse-effect record, quoted above. Where a percentage is shown, it is the share of 93,588 voluntary FDA FAERS reports for Trimethoprim that mention that effect — a reporting proportion, not an incidence rate and not evidence the drug caused it. Wording is matched across sources by our own clinical vocabulary, so treat this as a prompt to pay attention, not a diagnosis.

From our Q&A

Questions About Black Mulberry or Trimethoprim

These are real questions from readers, answered by the pharmacists at HelloPharmacist — written by a person, not generated from a database. Each one covers Black Mulberry or Trimethoprim, not necessarily both, but if one is close to what you were about to ask it will usually go further than a database entry can:

Not quite your question? Ask our pharmacists directly — it is free, there is no account required, and answers usually come back within 24 hours.

Everything else you take

See Every Supplement That Interacts With Trimethoprim

This page covers Black Mulberry only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Trimethoprim page lists 59 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), American Hellebore (major), Arsenic (major), Cesium (major) and Ephedra (major).

By severity: 7 major · 41 moderate · 11 minor.

From our pharmacist’s overview on the Trimethoprim page

“Most prescriptions for trimethoprim are short courses for bladder infections, which makes it easy to assume nothing swallowed alongside it matters much. Seven of the 59 supplement and herbal ingredients here rate major, though, and nearly all of them involve heart rhythm: grapefruit in large amounts, ephedra, and a few others can prolo…”

Reviewed by 2 · Jul 18, 2026

Open the Trimethoprim interaction page

How much people look this up

Where Black Mulberry and Trimethoprim 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 Black Mulberry
Steady interest

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

29 days ago today
Medication Trimethoprim
Steady interest

#2,652 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 Black Mulberry reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The Black Mulberry and Trimethoprim 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 Black Mulberry

What is Black Mulberry?

Black Mulberry
  • General antioxidant support
  • Blood sugar support
  • Cholesterol and heart health
  • Digestive health
  • Cold and sore throat remedies (traditional)

Black mulberry is a nutritious fruit rich in antioxidants and vitamins, and it is generally safe to enjoy as a food. Some early research on its leaf and fruit extracts hints at benefits for blood sugar and cholesterol, but the evidence is still limited. Talk with your pharmacist or doctor before using concentrated extracts, especially if you have a health condition.

Morus nigra · Moraceae · Fruit (berries), leaves, and sometimes root bark · Fresh or dried fruit, juice, jam, tea, powder, and capsules or extracts

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

Black Mulberry: dosing

There is no official standardized dose for black mulberry supplements. The amount in products varies widely depending on whether the fruit, leaf, or an extract is used.If you use a commercial product, follow the directions on the label and do not take more than recommended. Eating the fresh or dried fruit as part of a normal diet does not require special dosing.

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

Read the full Black Mulberry monograph & all interactions
Medication

About Trimethoprim

What Is Trimethoprim Used For?

Brand names: Proloprim, Trimpex

Trimethoprim tablets are used to treat initial episodes of uncomplicated urinary tract infections (UTIs). It works against specific bacteria — including E. coli, Proteus mirabilis, Klebsiella pneumoniae, Enterobacter species, and coagulase-negative Staphylococcus species (including S. saprophyticus).

It should only be used when there is a proven or strongly suspected bacterial infection. Your doctor may order a urine culture to confirm which bacteria are present and whether trimethoprim will work against them.

Most-Reported Side Effects for Trimethoprim

From FAERS, the FDA’s public side-effect reporting system (95,001 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.

Fever 6,904 reports
Fatigue 5,992 reports
Diarrhea 5,716 reports
Nausea 5,685 reports
Dyspnea 5,098 reports
See full Trimethoprim drug information
Keep checking

Other Drugs & Black Mulberry

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

0Major
87Moderate
0Minor
2,742No known interaction
87 Moderate 2,742 No interaction
Moderate

87 interactions

Showing 60 of 87 moderate interactions — see all 87 on the Black Mulberry page.

No interaction 2,742 drugs checked — show the list

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

Showing the 60 most looked-up of 2,742 medications checked with no known interaction — see the full Black Mulberry list.

See the full Black Mulberry interactions page
See every supplement checked against Trimethoprim, ranked by severity
Evidence & sources

Black Mulberry References

The 5 references that drive our Black Mulberry 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. Brinker F. Herb Contraindications and Drug Interactions. 2nd ed. Sandy, OR: Eclectic Medical Publications, 1998.
  2. Kim, H., Yoon, Y. J., Shon, J. H., Cha, I. J., Shin, J. G., and Liu, K. H. Inhibitory effects of fruit juices on CYP3A activity. Drug Metab Dispos. 2006;34(4):521-523. PubMed
  3. Xu LJ, Yu MH, Huang CY, et al. Isoprenylated flavonoids from Morus nigra and their PPAR ? agonistic activities. Fitoterapia 2018;127:109-14. PubMed
  4. Momeni H, Salehi A, Absalan A, Akbari M. Hydro-alcoholic extract of Morus nigra reduces fasting blood glucose and HbA1c% in diabetic patients, probably via competitive and allosteric interaction with alpha-glucosidase enzyme; a clinical trial and in silic
  5. Navarro-Triviño FJ, Jadczak P, Llamas-Molina JM, Ruiz-Villaverde R. Lichenoid contact dermatitis caused by Morus nigra L. Contact Dermatitis 2021;84(6):484-486.

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 Black Mulberry and Trimethoprim Together: Common Questions

Is it safe to take Black Mulberry with Trimethoprim?
We do not list a known interaction between Black Mulberry and Trimethoprim. 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.
Do Black Mulberry and Trimethoprim have any of the same side effects?
Yes — our sources link each of them separately to one of the same effects. That is not an interaction: neither changes how your body handles the other. It does mean that if one of those effects turns up, it can be harder to tell which one is behind it. They are listed on this page with the source behind each.
How was the Black Mulberry and Trimethoprim combination checked?
Interactions in our licensed database are recorded against drug classes. Trimethoprim is filed under 4 classifications, and Black Mulberry has documented interactions with 2 drug classes — none of Trimethoprim'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 Black Mulberry interact with any other medications?
Yes. Black Mulberry has 87 documented drug interactions in our database — Trimethoprim 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 Trimethoprim interact with any supplements?
Yes. Trimethoprim has documented interactions with 59 supplements in our database — Black Mulberry is not one of them. The Trimethoprim 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

Black Mulberry monograph Uses, safety profile, and every drug interaction in one place Trimethoprim drug information The full plain-English guide to this medication Trimethoprim supplement interactions Every supplement checked against Trimethoprim, 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 5 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Trimethoprim and Black Mulberry?

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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.