Drug & supplement interaction

Simaruba + Tolbutamide

Tolbutamide brand name: Orinase.

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 Simaruba and Tolbutamide 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

Simaruba and Tolbutamide

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 Tolbutamide and Simaruba 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 Simaruba at all — not against Tolbutamide, 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.

Simaruba safety at a glance

Simaruba overall Use caution Human safety data are limited, so use cautiously and under professional guidance.
Pregnancy Likely Unsafe When used orally during pregnancy due to apparent abortifacient effects; avoid using. There is insufficient reliable information available about the safety of s... Read the full pregnancy detail
Breastfeeding Likely Unsafe When used orally during pregnancy due to apparent abortifacient effects; avoid using. There is insufficient reliable information available about the safety of s... Read the full breastfeeding detail

Pregnancy & breastfeeding ratings are from Natural Medicines (Therapeutic Research Center) — the full detail is in the Special populations card below. Safety guidance is general; always confirm with your pharmacist or doctor for your situation.

Still wondering about combining Tolbutamide and Simaruba? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
What to actually watch for

What Simaruba Itself Has Been Linked To

This is not an interaction — nothing below involves Tolbutamide. It is the side-effect record for Simaruba on its own, from the licensed Natural Medicines monograph. If something new turns up after you add Simaruba, this list is the first place to look.

  • Vomiting Additional detail

    “Orally, ingesting large amounts of simaruba can cause vomiting (18).”

    Simaruba · Natural Medicines adverse-effect record, reported in nausea and vomiting.

    1 source cited
    1. 18. Gruenwald J, Brendler T, Jaenicke C. PDR for Herbal Medicines. 1st ed. Montvale, NJ: Medical Economics Company, Inc., 1998.

Everything above comes from the Natural Medicines adverse-effect record for Simaruba — expand a row for the licensed statement it rests on. We haven’t matched Tolbutamide 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 Tolbutamide.

Special populations

Simaruba in Pregnancy & Breastfeeding

Pregnancy And Lactation Likely Unsafe

When used orally during pregnancy due to apparent abortifacient effects; avoid using. There is insufficient reliable information available about the safety of simaruba during lactation.

DISCLAIMER: This tool is intended for informational purposes only, and should not be interpreted as specific medical advice. Patients should consult with a qualified healthcare provider before making decisions about therapies and/or health conditions.© 2026 Therapeutic Research Center

Everything else you take

See Every Supplement That Interacts With Tolbutamide

This page covers Simaruba only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Tolbutamide page lists 305 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Siberian Cocklebur (major), Acai (moderate), Adrafinil (moderate) and African Wild Potato (moderate).

By severity: 2 major · 255 moderate · 48 minor.

From our pharmacist’s overview on the Tolbutamide page

“People take tolbutamide (Orinase) to lower blood sugar in type 2 diabetes, and diabetes is exactly the condition supplement shelves target, which is why this list runs to 305 ingredients and deserves real caution. Of those, 239 also push glucose around, most often downward, so combining them can drive sugar lower than intended.”

Reviewed by 2 · Jul 18, 2026

Open the Tolbutamide interaction page

One more smart check

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

We hold 2 real supplement products containing Simaruba, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Simaruba. Even though Simaruba itself has no known interaction with Tolbutamide, 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 Simaruba and Tolbutamide 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 Simaruba
Top half

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

29 days ago today
Medication Tolbutamide
Steady interest

#2,276 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 Simaruba reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The Simaruba and Tolbutamide 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 Simaruba

What is Simaruba?

  • Diarrhea and dysentery
  • Digestive upset
  • Malaria and fevers (traditional)
  • Intestinal parasites
  • General antimicrobial use

Simaruba (Simarouba amara) is a tropical tree whose bark has long been used in folk medicine for diarrhea, dysentery, and fevers. Modern, high-quality human studies are very limited, so its benefits and safety are not well proven. Talk to a pharmacist or doctor before using it, and avoid it during pregnancy and breastfeeding.

Simarouba amara · Simaroubaceae · Bark (especially root and stem bark), sometimes leaves · Dried bark for tea or decoction, tincture, capsules, liquid extract

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

Simaruba: dosing

There is no standardized, well-established dose for Simaruba. Traditional preparations were usually water-based extracts (decoctions) of the bark, but these vary widely in strength.If you choose to use a commercial product, follow the directions on the label and do not exceed the recommended amount.

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

Read the full Simaruba monograph & all interactions
Medication

About Tolbutamide

What Is Tolbutamide Used For?

Brand name: Orinase

  • Tolbutamide is used along with diet and exercise, and sometimes with other medications, to treat type 2 diabetes (condition in which the body does not use insulin normally and, therefore, cannot control the amount of sugar in the blood). Tolbutamide is in a class of medications called sulfonylureas. Tolbutamide lowers blood sugar by causing the pancreas to produce insulin (a natural substance that is needed to break down sugar in the body) and helping the body use insulin efficiently. This medication will only help lower blood sugar in people whose bodies produce insulin naturally. Tolbutamide is not used to treat type 1 diabetes (condition in which the body does not produce insulin and, therefore, cannot control the amount of sugar in the blood) or diabetic ketoacidosis (a serious condition that may occur if high blood sugar is not treated).

  • Over time, people who have diabetes and high blood sugar can develop serious or life-threatening complications, including heart disease, stroke, kidney problems, nerve damage, and eye problems. Taking medication(s), making lifestyle changes (e.g., diet, exercise, quitting smoking), and regularly checking your blood sugar may help to manage your diabetes and improve your health. This therapy may also decrease your chances of having a heart attack, stroke, or other diabetes-related complications such as kidney failure, nerve damage (numb, cold legs or feet; decreased sexual ability in men and women), eye problems, including changes or loss of vision, or gum disease. Your doctor and other healthcare providers will talk to you about the best way to manage your diabetes.

See full Tolbutamide drug information
Keep checking

Other Drugs & Simaruba

Browse every other medication we’ve checked against Simaruba — 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 Simaruba 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 Simaruba list.

See the full Simaruba interactions page
See every supplement checked against Tolbutamide, ranked by severity
Evidence & sources

Simaruba References

The 2 references that drive our Simaruba 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. Gruenwald J, Brendler T, Jaenicke C. PDR for Herbal Medicines. 1st ed. Montvale, NJ: Medical Economics Company, Inc., 1998.
  2. Hocking GM. A dictionary of natural products. 2nd ed. Medford, OR: Plexus Publishing, 1997.

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 Simaruba and Tolbutamide Together: Common Questions

Is it safe to take Simaruba with Tolbutamide?
We do not list a known interaction between Simaruba and Tolbutamide. 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 Tolbutamide interact with any supplements?
Yes. Tolbutamide has documented interactions with 305 supplements in our database — Simaruba is not one of them. The Tolbutamide 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

Simaruba monograph Uses, safety profile, and every drug interaction in one place Tolbutamide drug information The full plain-English guide to this medication Tolbutamide supplement interactions Every supplement checked against Tolbutamide, 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 Tolbutamide and Simaruba?

Our pharmacists answer your medication & supplement questions — free.

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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.