Drug & supplement interaction

Black Mulberry + Acarbose

Acarbose brand names: Precose, Prandase, Glucobay.

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

Black Mulberry has a moderate interaction with Acarbose. Theoretically, black mulberry leaf might increase the risk of hypoglycemia when taken with antidiabetes drugs.

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

Black Mulberry and Acarbose

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

Moderate

ANTIDIABETES DRUGS

Why this applies to Acarbose

Acarbose falls under ANTIDIABETES DRUGS — the group Black Mulberry interacts with.

Theoretically, black mulberry leaf might increase the risk of hypoglycemia when taken with antidiabetes drugs.
One small clinical study shows that black mulberry leaf extract has hypoglycemic effects. This is supported by in vitro research which also suggests that constituents in black mulberry twigs and leaves might have hypoglycemic effects.
Severity Moderate Likelihood Possible Evidence D

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.

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

Here's an interesting overlap worth knowing about. Acarbose works by slowing the enzymes in your gut that break starches into sugar, which keeps your blood sugar from spiking after meals. Black mulberry leaf contains a compound called DNJ that blocks those same sugar-digesting enzymes. So the two can push in the same direction, and in theory that combined effect could lower your blood sugar more than expected.

I want to be honest about the strength of this: it's based on how these things work plus one small study, not solid proof. Enjoying mulberries as a food is very unlikely to matter. Concentrated leaf extracts are the bigger question. If you take acarbose and want to try a mulberry supplement, check with your pharmacist or doctor first, and watch for signs of low blood sugar like shakiness, sweating, or dizziness.

Contact Dr. Brian directly if you have additional questions on this interaction
References
  1. Brinker F. Herb Contraindications and Drug Interactions. 2nd ed. Sandy, OR: Eclectic Medical Publications, 1998.
  2. Xu LJ, Yu MH, Huang CY, et al. Isoprenylated flavonoids from Morus nigra and their PPAR ? agonistic activities. Fitoterapia 2018;127:109-14. PubMed
  3. 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

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

Black Mulberry Also Interacts With Other Medications

Black Mulberry has 86 moderate known drug interactions in our database — the Acarbose one above is one of them. If you take anything else, check it against the full list below.

Moderate 86 No known interaction 2,744 (incl. Acarbose)
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.

From our Q&A

Questions About Black Mulberry or Acarbose

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 Acarbose, 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 Acarbose

This page covers Black Mulberry only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Acarbose page lists 281 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Beer (major), Siberian Cocklebur (major), Wine (major) and Acai (moderate).

By severity: 4 major · 240 moderate · 37 minor.

From our pharmacist’s overview on the Acarbose page

“Acarbose (Precose, Glucobay) is taken with meals to blunt the blood sugar rise after eating, and its supplement list calls for genuine care, starting with the four major-rated entries: heavy alcohol and the herb Siberian cocklebur can strain the liver alongside acarbose, while activated charcoal can soak up oral drugs and cut what reac…”

Reviewed by 2 · Jul 18, 2026

Open the Acarbose interaction page

How much people look this up

Where Black Mulberry and Acarbose 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

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

29 days ago today
Medication Acarbose
Top 5%

#76 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 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.

Read the full Black Mulberry monograph & all interactions
Medication

About Acarbose

What Is Acarbose Used For?

Brand names: Precose, Prandase, Glucobay

Acarbose tablets are used to help manage blood sugar levels in adults with type 2 diabetes. It is always used together with a proper diet and regular exercise — not as a replacement for them.

Acarbose can be used on its own or combined with other diabetes medicines, such as sulfonylureas, insulin, or metformin, to further improve blood sugar control.

See full Acarbose 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
86Moderate
0Minor
2,743No known interaction
86 Moderate 2,743 No interaction
Moderate

86 interactions

Showing 60 of 86 moderate interactions — see all 86 on the Black Mulberry page.

No interaction 2,743 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 2,743 medications checked with no known interaction — see the full Black Mulberry list.

See the full Black Mulberry interactions page
See every supplement checked against Acarbose, 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
Black Mulberry monograph › Uses, safety, and every drug interaction in one place Acarbose supplement interactions › Every supplement checked against Acarbose, ranked by severity Acarbose drug information › The full plain-English guide to this medication 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 Black Mulberry and Acarbose Together: Common Questions

Can you take Black Mulberry with Acarbose?
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 Black Mulberry and Acarbose 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 Acarbose 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.