Drug & supplement interaction

Guaiac Wood + Misoprostol

Misoprostol brand name: Cytotec.

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 Guaiac Wood and Misoprostol 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 label for Misoprostol states a food rule worth keeping to, and 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

Guaiac Wood and Misoprostol

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 Misoprostol and Guaiac Wood 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.

Guaiac Wood safety at a glance

Guaiac Wood overall Use caution Mostly used externally or as a scent; little safety data for internal use.
Pregnancy Avoid Not enough safety information, so it is best avoided during pregnancy.
Breastfeeding Avoid No reliable safety data while breastfeeding, so avoid use.

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

Still wondering about combining Misoprostol and Guaiac Wood? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
How we checked

Why No Interaction Is Listed for Misoprostol

Interactions in our licensed database are recorded against drug classes, not just single drug names. Misoprostol is filed under a single classification — oral drugs. Guaiac Wood has documented interactions with 1 drug class — the most serious being lithium (moderate) — and none of Misoprostol’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

Guaiac Wood Does Interact With Other Medications

Guaiac Wood has 1 moderate known drug interaction in our database — Misoprostol isn’t one of them. If you take anything else, check it against the full list below.

Moderate 1 No known interaction 2,829 (incl. Misoprostol)
Taking anything else?

Check Another of Your Medications Against Guaiac Wood

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

What to actually watch for

No Interaction Found — But Data Suggests Guaiac Wood and Misoprostol 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.

  • Diarrhea Additional detail

    Guaiac Wood

    “Orally, high doses of guaiac wood can cause diarrhea, gatroenteritis, or intestinal colic (18).”

    Guaiac Wood · Natural Medicines adverse-effect record, reported in diarrhea.

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

    Misoprostol

    Listed in the ADVERSE REACTIONS section of the FDA label for Misoprostol. Read the label on DailyMed ›

Effects for Misoprostol come from the ADVERSE REACTIONS section of its FDA label; effects for Guaiac Wood come from the Natural Medicines adverse-effect record, quoted above. Where a percentage is shown, it is the share of 16,478 voluntary FDA FAERS reports for Misoprostol 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.

How to take them

Some Misoprostol Products Have a Food Rule — Guaiac Wood Should Not Break It

At least one FDA label for a product containing Misoprostol says to take it with food. If you take Guaiac Wood on an empty stomach out of habit, keep them separate — and take Misoprostol with a meal where the label says to.

This may not be true of your version. Food instructions belong to the product, not the ingredient: two Misoprostol products can carry different directions, and extended-release forms often differ from immediate-release ones. The label we read is quoted below — check the directions on your own box or bottle, or ask your pharmacist, for how to take the exact product you were given.

DOSAGE AND ADMINISTRATION The recommended adult oral dose of Cytotec for reducing the risk of NSAID-induced gastric ulcers is 200 mcg four times daily with food.

From the Dosage and Administration section of the FDA label we read for Misoprostol — where that label names a specific product, the instruction is that product's. Read the label on DailyMed ›

A food rule is not an interaction — it is about how much of the medicine you absorb. The directions that came with your own product, and your pharmacist, outrank anything on this page.

Everything else you take

See Every Supplement That Interacts With Misoprostol

This page covers Guaiac Wood only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Misoprostol page lists 17 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Coffee Charcoal (moderate), European Mandrake (moderate), Glucomannan (moderate) and Guar Gum (moderate).

By severity: 1 major · 7 moderate · 9 minor.

From our pharmacist’s overview on the Misoprostol page

“Misoprostol (Cytotec) is taken by mouth to protect the stomach lining from ulcers caused by NSAID pain relievers, and all 17 of its recorded supplement interactions come down to the same problem, something in the gut keeping the pill from being absorbed properly. That deserves genuine wariness, because misoprostol that never reaches th…”

Reviewed by 2 · Jul 18, 2026

Open the Misoprostol interaction page

How much people look this up

Where Guaiac Wood and Misoprostol 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 Guaiac Wood
Steady interest

#1,192 of 1,452 supplements looked up here in the last 7 days

29 days ago today
Medication Misoprostol
Steady interest

#2,333 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 Guaiac Wood reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 13, 2026. The Guaiac Wood and Misoprostol 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 Guaiac Wood

What is Guaiac Wood?

  • Fragrance in perfumes and soaps
  • Aromatherapy and relaxation
  • Traditional anti-inflammatory remedy
  • Skin care products
  • Traditional joint and arthritis support

Guaiac wood is mainly valued for its sweet, smoky-rosy aroma and is used widely as a fragrance ingredient and in aromatherapy. There is very little high-quality human research supporting any health or medical benefit, so it should be thought of as a scent rather than a proven remedy. If you want to use it, talk to your pharmacist or doctor first, and avoid taking it by mouth.

Bulnesia sarmientoi · Zygophyllaceae · Wood and essential oil (also called guaiacwood oil) · Essential oil, aromatherapy blends, soaps and perfumes; sometimes wood chips or resin

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

Guaiac Wood: dosing

There is no established or standardized medical dose for guaiac wood. It is most often used in small amounts as a fragrance in finished products such as soaps, perfumes, or aromatherapy diffuser blends.If you choose to use a guaiac wood product, follow the directions on the label and dilute essential oils properly before applying them to skin.

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

Read the full Guaiac Wood monograph & all interactions
Medication

About Misoprostol

What Is Misoprostol Used For?

Brand name: Cytotec

Cytotec (misoprostol) tablets and misoprostol tablets are approved to reduce the risk of gastric ulcers (stomach ulcers) in patients who take NSAIDs — nonsteroidal anti-inflammatory drugs such as aspirin, ibuprofen, or diclofenac — and who are at high risk of ulcer complications. High-risk patients include older adults, people with serious ongoing illnesses, and those with a history of stomach ulcers.

It is important to note that misoprostol has not been shown to reduce the risk of duodenal ulcers (ulcers in the first part of the small intestine) in people taking NSAIDs. It also does not relieve the stomach pain or discomfort that NSAIDs can cause.

Most-Reported Side Effects for Misoprostol

From FAERS, the FDA’s public side-effect reporting system (16,478 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.

Hemorrhage 1,322 reports
Abortion incomplete 1,159 reports
Nausea 1,031 reports
Arthralgia 977 reports
Rheumatoid arthritis 805 reports
See full Misoprostol drug information
Keep checking

Other Drugs & Guaiac Wood

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

0Major
1Moderate
0Minor
2,828No known interaction
1 Moderate 2,828 No interaction
Moderate

1 interaction

No interaction 2,828 drugs checked — show the list

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

Showing the 60 most looked-up of 2,828 medications checked with no known interaction — see the full Guaiac Wood list.

See the full Guaiac Wood interactions page
See every supplement checked against Misoprostol, ranked by severity
Evidence & sources

Guaiac Wood References

The 1 references that drive our Guaiac Wood 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.

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 Guaiac Wood and Misoprostol Together: Common Questions

Is it safe to take Guaiac Wood with Misoprostol?
We do not list a known interaction between Guaiac Wood and Misoprostol. 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 Guaiac Wood and Misoprostol 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.
Should I take Guaiac Wood and Misoprostol at the same time of day?
At least one FDA label for a product containing Misoprostol says to take it with food. If you take Guaiac Wood on an empty stomach out of habit, keep them separate and take Misoprostol with a meal where the label says to. Food instructions belong to the product rather than the ingredient — two Misoprostol products can differ — so check the directions on your own box. This is about absorption, not an interaction.
How was the Guaiac Wood and Misoprostol combination checked?
Interactions in our licensed database are recorded against drug classes. Misoprostol is filed under 1 classification, and Guaiac Wood has documented interactions with 1 drug class — none of Misoprostol'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 Guaiac Wood interact with any other medications?
Yes. Guaiac Wood has 1 documented drug interaction in our database — Misoprostol 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 Misoprostol interact with any supplements?
Yes. Misoprostol has documented interactions with 17 supplements in our database — Guaiac Wood is not one of them. The Misoprostol 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

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

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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.