Drug & supplement interaction

Osha + Rifamycin

Rifamycin brand name: Aemcolo.

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 Osha and Rifamycin 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

Osha and Rifamycin

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 Rifamycin and Osha 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 Osha at all — not against Rifamycin, 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.

Osha safety at a glance

Osha overall Use caution Limited safety data exist, and wild osha can be confused with poisonous look-alike plants.
Pregnancy Likely Unsafe When used orally. Osha has been used to stimulate menstruation and is reported to have abortifacient activity; contraindicated. Read the full pregnancy detail
Breastfeeding Avoid No reliable safety data are available, so avoid use while breastfeeding.

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 Rifamycin and Osha? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
Special populations

Osha in Pregnancy & Breastfeeding

Pregnancy Likely Unsafe

When used orally. Osha has been used to stimulate menstruation and is reported to have abortifacient activity; contraindicated.

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

From our Q&A

Questions About Osha or Rifamycin

These are real questions from readers, answered by the pharmacists at HelloPharmacist — written by a person, not generated from a database. Each one covers Osha or Rifamycin, 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 Rifamycin

This page covers Osha only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Rifamycin page lists 44 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Bacillus Coagulans (moderate), Bacillus Subtilis (moderate), Bifidobacterium Animalis Subsp. Lactis (moderate) and Bifidobacterium Bifidum (moderate).

By severity: 1 major · 33 moderate · 10 minor.

From our pharmacist’s overview on the Rifamycin page

“Rifamycin (Aemcolo) is an antibiotic that stays mostly in the gut to treat travelers' diarrhea, and I would give its supplement list genuine care, chiefly for one major-rated entry among the 44. Activated charcoal, often taken for the very stomach upset this drug treats, can soak up rifamycin and cut how much survives to do its job.”

Reviewed by 2 · Jul 18, 2026

Open the Rifamycin interaction page

One more smart check

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

We hold 336 real supplement products containing Osha, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Osha. Even though Osha itself has no known interaction with Rifamycin, 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 Osha and Rifamycin 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 Osha
Top half

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

29 days ago today
Medication Rifamycin
Top 25%

#395 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 Osha reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The Osha and Rifamycin records this page draws on were last updated July 11, 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 Osha

What is Osha?

  • Cough and sore throat
  • Respiratory infections and colds
  • Immune support
  • Digestive upset
  • Bronchitis and congestion

Osha is a root from a wild mountain plant native to the western United States and Mexico, traditionally used by Native American and Hispanic communities for coughs, colds, and sore throats. Solid human research is lacking, so its benefits remain unproven, and it should be avoided during pregnancy and breastfeeding. Talk to your pharmacist or doctor before trying it.

Ligusticum porteri · Apiaceae · Root · Tea, tincture, capsules, lozenges, chewed raw root

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

Osha: dosing

There is no established standard dose for osha. The right amount depends on the form (tea, tincture, capsule, or lozenge) and the product's strength.If you choose to use osha, follow the directions on the product label and do not exceed them.

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

Read the full Osha monograph & all interactions
Medication

About Rifamycin

What Is Rifamycin Used For?

Brand name: Aemcolo

  • Rifamycin is used to treat of travelers' diarrhea caused by certain bacteria. Rifamycin is in a class of medications called antibiotics. It works by stopping the growth of the bacteria that cause diarrhea.

  • Antibiotics such as rifamycin will not work for colds, flu, or other viral infections. Using antibiotics when they are not needed increases your risk of getting an infection later that resists antibiotic treatment.

See full Rifamycin drug information
Keep checking

Other Drugs & Osha

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

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

Osha References

The 2 references that drive our Osha 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. McGuffin M, Hobbs C, Upton R, Goldberg A, eds. American Herbal Products Association's Botanical Safety Handbook. Boca Raton, FL: CRC Press, LLC 1997.
  2. Brinker F. Herb Contraindications and Drug Interactions. 2nd ed. Sandy, OR: Eclectic Medical Publications, 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 Osha and Rifamycin Together: Common Questions

Is it safe to take Osha with Rifamycin?
We do not list a known interaction between Osha and Rifamycin. 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 Rifamycin interact with any supplements?
Yes. Rifamycin has documented interactions with 44 supplements in our database — Osha is not one of them. The Rifamycin 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

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

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.