Drug & supplement interaction

Black Alder + Gemfibrozil

Gemfibrozil brand name: Lopid.

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

We found no known interaction between Black Alder and Gemfibrozil 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.

Know someone taking this? Share
Facebook Post Reddit Email
On this page
Interaction report

Black Alder and Gemfibrozil

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 Gemfibrozil and Black Alder 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 Alder safety at a glance

Black Alder overall Use caution Limited safety data exist and it may cause nausea or stomach upset, so use cautiously and briefly.
Pregnancy Avoid There is not enough safety information, so it is best avoided during pregnancy.
Breastfeeding Avoid Safety while breastfeeding is unknown, so avoiding it is the safer choice.

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

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

Why No Interaction Is Listed for Gemfibrozil

Interactions in our licensed database are recorded against drug classes, not just single drug names. Gemfibrozil is filed under 4 classifications — including cytochrome p450 2c9 (cyp2c9) inhibitors, hepatotoxic drugs, oral drugs. Black Alder has documented interactions with 2 drug classes — the most serious being cisplatin (platinol-aq) (moderate) and doxorubicin (adriamycin, others) (moderate) — and none of Gemfibrozil’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 Alder Does Interact With Other Medications

Black Alder has 2 moderate known drug interactions in our database — Gemfibrozil isn’t one of them. If you take anything else, check it against the full list below.

Moderate 2 No known interaction 2,828 (incl. Gemfibrozil)
Taking anything else?

Check Another of Your Medications Against Black Alder

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

What to actually watch for

What Gemfibrozil’s Own FDA Label Lists

This is not an interaction — none of it involves Black Alder. These are the most notable effects listed in the ADVERSE REACTIONS section of Gemfibrozil’s own FDA label, for the medication by itself. Knowing the drug’s own list makes it easier to work out the likely cause if something new turns up while you take both. 10 of them are worth acting on rather than waiting out — marked below.

  • Severe muscle breakdown Worth acting on
  • Muscle weakness Worth acting on
  • Pancreatitis Worth acting on
  • Yellowing of the skin or eyes Worth acting on
  • Fainting Worth acting on
  • An irregular heartbeat Worth acting on
  • Confusion Worth acting on
  • Seizures Worth acting on
  • Low mood Worth acting on
  • A low platelet count Worth acting on

Showing the 10 most notable of 40 label-listed effects — ranked by how unusual each one is across medicines generally, with serious effects weighted up.

From the ADVERSE REACTIONS section of the FDA label for Gemfibrozil. Read the label on DailyMed › Black Alder’s licensed record lists no adverse effects our clinical vocabulary could match, so there is no Black Alder side to compare — that is a limit of the record, not a statement that Black Alder has no side effects.

From our Q&A

Questions About Black Alder or Gemfibrozil

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 Alder or Gemfibrozil, 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 Gemfibrozil

This page covers Black Alder only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Gemfibrozil page lists 59 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 Ashwagandha (moderate).

By severity: 4 major · 46 moderate · 9 minor.

Open the Gemfibrozil interaction page

One more smart check

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

We hold 21 real supplement products containing Black Alder, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Black Alder. Even though Black Alder itself has no known interaction with Gemfibrozil, another ingredient on your label might. Find your product and we’ll check every ingredient on its label:

How much people look this up

Where Black Alder and Gemfibrozil 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 Alder
Top half

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

29 days ago today
Medication Gemfibrozil
Steady interest

#2,396 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 Alder reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The Black Alder and Gemfibrozil records this page draws on were last updated June 22, 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 Alder

What is Black Alder?

Black Alder
  • Sore throat and mouth inflammation
  • Skin wounds and irritation (topical)
  • Fever and general aches (traditional)
  • Digestive complaints
  • Astringent for minor bleeding

Black Alder is a European tree whose bark and leaves have a long history in folk medicine, mainly as an astringent gargle or wound wash. There is very little modern human research to confirm any of these uses, and it can cause stomach upset, so it should be used cautiously and avoided during pregnancy and breastfeeding.

Alnus glutinosa · Betulaceae · Bark, leaves, and sometimes the catkins · Dried bark or leaf for tea, decoctions, tinctures, and gargles or mouth rinses

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

Black Alder: dosing

There is no established, standardized dose for Black Alder. Traditional use involved making a tea or decoction from the dried bark or leaves, or using a diluted preparation as a gargle or skin wash.If you choose to use a product, follow the directions on the label and do not exceed the recommended amount.

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

Read the full Black Alder monograph & all interactions
Medication

About Gemfibrozil

What Is Gemfibrozil Used For?

Brand name: Lopid

Gemfibrozil tablets are used in adults with very high triglyceride (blood fat) levels — especially when those levels are high enough to risk pancreatitis (dangerous inflammation of the pancreas) — and who haven't responded well enough to diet alone.

Gemfibrozil is also used in a specific group of adults who have a combination of low HDL ("good") cholesterol, high LDL ("bad") cholesterol, and high triglycerides, to reduce the risk of developing coronary heart disease — but only when diet, exercise, and other treatments haven't been enough. It is always used alongside, not instead of, a heart-healthy diet.

Most-Reported Side Effects for Gemfibrozil

From FAERS, the FDA’s public side-effect reporting system (0 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.

Nausea 886 reports
Fatigue 833 reports
Diarrhea 731 reports
Dizziness 618 reports
Rhabdomyolysis 605 reports
See full Gemfibrozil drug information
Keep checking

Other Drugs & Black Alder

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

0Major
2Moderate
0Minor
2,827No known interaction
2 Moderate 2,827 No interaction
Moderate

2 interactions

No interaction 2,827 drugs checked — show the list

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

Showing the 60 most looked-up of 2,827 medications checked with no known interaction — see the full Black Alder list.

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

Black Alder References

The 1 references that drive our Black Alder 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. Dinic J, Novakovic M, Podolski-Renic A, et al. Antioxidative activity of diarylheptanoids from the bark of black alder (Alnus glutinosa) and their interaction with anticancer drugs. Planta Med 2014;80(13):1088-96. doi: 10.1055/s-0034-1382993. Epub 2014 Au PubMed

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 Alder and Gemfibrozil Together: Common Questions

Is it safe to take Black Alder with Gemfibrozil?
We do not list a known interaction between Black Alder and Gemfibrozil. 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.
How was the Black Alder and Gemfibrozil combination checked?
Interactions in our licensed database are recorded against drug classes. Gemfibrozil is filed under 4 classifications, and Black Alder has documented interactions with 2 drug classes — none of Gemfibrozil'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 Alder interact with any other medications?
Yes. Black Alder has 2 documented drug interactions in our database — Gemfibrozil 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 Gemfibrozil interact with any supplements?
Yes. Gemfibrozil has documented interactions with 59 supplements in our database — Black Alder is not one of them. The Gemfibrozil 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 Alder monograph Uses, safety profile, and every drug interaction in one place Gemfibrozil drug information The full plain-English guide to this medication Gemfibrozil supplement interactions Every supplement checked against Gemfibrozil, 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 1 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Gemfibrozil and Black Alder?

Our pharmacists answer your medication & supplement questions — free.

Ask a pharmacist

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.