Drug & supplement interaction

Eastern Red Cedar + Carvedilol

Carvedilol brand names: Coreg, Coreg CR.

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 Eastern Red Cedar and Carvedilol 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 Carvedilol 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

Eastern Red Cedar and Carvedilol

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 Carvedilol and Eastern Red Cedar 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.

Eastern Red Cedar safety at a glance

Eastern Red Cedar overall Use caution Often used topically or for aroma, but the essential oil can be harmful if swallowed and human safety data are limited.
Pregnancy Likely Unsafe When used orally. Eastern red cedar is contraindicated in pregnancy due to reports of abortifacient activity. The specific part or dose of Eastern red cedar ass... Read the full pregnancy detail
Breastfeeding Avoid Not enough safety information exists, so it is best avoided 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 Carvedilol and Eastern Red Cedar? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
How we checked

Why No Interaction Is Listed for Carvedilol

Interactions in our licensed database are recorded against drug classes, not just single drug names. Carvedilol is filed under 7 classifications — including beta-blockers, cytochrome p450 2c9 (cyp2c9) substrates, antihypertensive drugs. Eastern Red Cedar has documented interactions with 1 drug class — the most serious being barbiturates (minor) — and none of Carvedilol’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

Eastern Red Cedar Does Interact With Other Medications

Eastern Red Cedar has 49 minor known drug interactions in our database — Carvedilol isn’t one of them. If you take anything else, check it against the full list below.

Minor 49 No known interaction 2,781 (incl. Carvedilol)
Taking anything else?

Check Another of Your Medications Against Eastern Red Cedar

Covers the 2,830 medications we’ve checked against Eastern Red Cedar. Pick one to open its full report.

What to actually watch for

No Interaction Found — But Data Suggests Eastern Red Cedar and Carvedilol May Share Several of the Same Side Effects

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. 2 of them are worth acting on rather than waiting out — marked below.

  • Seizures / An allergic reaction Worth acting on Additional detail

    Eastern Red Cedar

    “Orally, overdose of Eastern red cedar oil might cause burning in the stomach, vomiting, convulsions, coma, and death (12). Topically, Eastern red cedar oil might cause local allergic reactions and irritation; however, several clinical assessments of safety show that applying Eastern red cedar oil topically does not cause skin sensitization or irritation (11,98802).”

    Eastern Red Cedar · Natural Medicines adverse-effect record, reported in nausea and vomiting.

    3 sources cited
    1. 12. 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. 11. Leung AY, Foster S. Encyclopedia of Common Natural Ingredients Used in Food, Drugs and Cosmetics. 2nd ed. New York, NY: John Wiley & Sons, 1996.
    3. 98802. Johnson W. Final report on the safety assessment of Juniperus communis Extract, Juniperus oxycedrus Extract, Juniperus oxycedrus Tar, Juniperus phoenicea extract, and Juniperus virginiana Extract. Int J Toxicol 2001;20 Suppl 2:41-56. PubMed

    Carvedilol

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

  • Vomiting Additional detail

    Eastern Red Cedar

    “Orally, overdose of Eastern red cedar oil (dose not specified) might cause burning in the stomach and vomiting (12).”

    Eastern Red Cedar · Natural Medicines adverse-effect record, reported in nausea and vomiting.

    1 source cited
    1. 12. McGuffin M, Hobbs C, Upton R, Goldberg A, eds. American Herbal Products Association's Botanical Safety Handbook. Boca Raton, FL: CRC Press, LLC 1997.

    Carvedilol

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

Effects for Carvedilol come from the ADVERSE REACTIONS section of its FDA label; effects for Eastern Red Cedar come from the Natural Medicines adverse-effect record, quoted above. Wording is matched across sources by our own clinical vocabulary, so treat this as a prompt to pay attention, not a diagnosis.

Special populations

Eastern Red Cedar in Pregnancy & Breastfeeding

Pregnancy Likely Unsafe

When used orally. Eastern red cedar is contraindicated in pregnancy due to reports of abortifacient activity. The specific part or dose of Eastern red cedar associated with its abortifacient activity is unclear; avoid using.

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

How to take them

Some Carvedilol Products Have a Food Rule — Eastern Red Cedar Should Not Break It

At least one FDA label for a product containing Carvedilol says to take it with food. If you take Eastern Red Cedar on an empty stomach out of habit, keep them separate — and take Carvedilol 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 Carvedilol 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.

2 DOSAGE AND ADMINISTRATION COREG should be taken with food to slow the rate of absorption and reduce the incidence of orthostatic effects.

From the Dosage and Administration section of the FDA label we read for Carvedilol — 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.

From our Q&A

Questions About Eastern Red Cedar or Carvedilol

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

This page covers Eastern Red Cedar only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Carvedilol page lists 211 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), American Hellebore (major), American Mistletoe (major), Grapefruit (major) and Indian Snakeroot (major).

By severity: 6 major · 171 moderate · 34 minor.

From our pharmacist’s overview on the Carvedilol page

“People take carvedilol (Coreg) for heart failure and high blood pressure, conditions where a sudden swing in pressure or heart rate matters, and its supplement list runs to 211 ingredients, so this one calls for genuine care. More than half of those entries lower blood pressure on their own, fish oil and celery seed among them, and can…”

Reviewed by 2 · Jul 18, 2026

Open the Carvedilol interaction page

One more smart check

Taking Eastern Red Cedar as Part of a Dietary Supplement Product? Check It for Interactions

We hold 8 real supplement products containing Eastern Red Cedar, each one broken down to its full ingredient list — and combination products often carry several ingredients besides Eastern Red Cedar. Even though Eastern Red Cedar itself has no known interaction with Carvedilol, 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 Eastern Red Cedar and Carvedilol 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 Eastern Red Cedar
Top half

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

29 days ago today
Medication Carvedilol
Top 25%

#336 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 Eastern Red Cedar reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The Eastern Red Cedar and Carvedilol 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 Eastern Red Cedar

What is Eastern Red Cedar?

  • Insect repellent
  • Aromatherapy and relaxation
  • Skin and minor wound care (topical, traditional)
  • Respiratory or congestion relief (traditional)
  • Antimicrobial and antifungal (lab-based interest)

Eastern Red Cedar is a North American evergreen tree whose wood and aromatic oil have long been used for fragrance, insect repelling, and folk remedies. Solid human research on its health benefits is very limited, and the essential oil can be toxic if swallowed, so it is mainly used externally or for aroma. Talk to a pharmacist or doctor before using it, especially during pregnancy or breastfeeding.

Juniperus virginiana · Cupressaceae · Leaves (needles), wood, berry-like cones, and essential oil · Essential oil, dried leaf, wood shavings/sachets, tinctures, and topical preparations

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

Eastern Red Cedar: dosing

There is no established, standardized medicinal dose for Eastern Red Cedar. It is not a well-studied oral supplement, and the essential oil is not meant to be taken by mouth.For aromatherapy or topical use, follow the directions on the specific product label and always dilute the essential oil in a carrier oil before applying to skin.

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

Read the full Eastern Red Cedar monograph & all interactions
Medication

About Carvedilol

What Is Carvedilol Used For?

Brand names: Coreg, Coreg CR

Carvedilol is used to treat three main conditions: mild-to-severe chronic heart failure, high blood pressure (hypertension), and reduced heart pumping function (left ventricular dysfunction) in people who have survived a heart attack. For heart failure, it is usually prescribed alongside other medications such as diuretics, ACE inhibitors, and digitalis to help people live longer and reduce the chance of hospital stays.

For people who have had a heart attack and whose heart is not pumping as well as it should, carvedilol is used to lower the risk of dying from heart-related causes. For high blood pressure, it can be used on its own or combined with other blood pressure medicines.

Most-Reported Side Effects for Carvedilol

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.

Fatigue 9,141 reports
Dyspnea 8,542 reports
Diarrhea 7,250 reports
Dizziness 7,211 reports
Nausea 6,830 reports
See full Carvedilol drug information
Keep checking

Other Drugs & Eastern Red Cedar

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

0Major
0Moderate
49Minor
2,780No known interaction
49 Minor 2,780 No interaction
Minor

49 interactions

No interaction 2,780 drugs checked — show the list

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

Showing the 60 most looked-up of 2,780 medications checked with no known interaction — see the full Eastern Red Cedar list.

See the full Eastern Red Cedar interactions page
See every supplement checked against Carvedilol, ranked by severity
Evidence & sources

Eastern Red Cedar References

The 4 references that drive our Eastern Red Cedar 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. Leung AY, Foster S. Encyclopedia of Common Natural Ingredients Used in Food, Drugs and Cosmetics. 2nd ed. New York, NY: John Wiley & Sons, 1996.
  2. McGuffin M, Hobbs C, Upton R, Goldberg A, eds. American Herbal Products Association's Botanical Safety Handbook. Boca Raton, FL: CRC Press, LLC 1997.
  3. Brinker F. Herb Contraindications and Drug Interactions. 2nd ed. Sandy, OR: Eclectic Medical Publications, 1998.
  4. Johnson W. Final report on the safety assessment of Juniperus communis Extract, Juniperus oxycedrus Extract, Juniperus oxycedrus Tar, Juniperus phoenicea extract, and Juniperus virginiana Extract. Int J Toxicol 2001;20 Suppl 2:41-56. 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 Eastern Red Cedar and Carvedilol Together: Common Questions

Is it safe to take Eastern Red Cedar with Carvedilol?
We do not list a known interaction between Eastern Red Cedar and Carvedilol. 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 Eastern Red Cedar and Carvedilol have any of the same side effects?
Yes — our sources link each of them separately to 3 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 Eastern Red Cedar and Carvedilol at the same time of day?
At least one FDA label for a product containing Carvedilol says to take it with food. If you take Eastern Red Cedar on an empty stomach out of habit, keep them separate and take Carvedilol with a meal where the label says to. Food instructions belong to the product rather than the ingredient — two Carvedilol products can differ — so check the directions on your own box. This is about absorption, not an interaction.
How was the Eastern Red Cedar and Carvedilol combination checked?
Interactions in our licensed database are recorded against drug classes. Carvedilol is filed under 7 classifications, and Eastern Red Cedar has documented interactions with 1 drug class — none of Carvedilol'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 Eastern Red Cedar interact with any other medications?
Yes. Eastern Red Cedar has 49 documented drug interactions in our database — Carvedilol 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 Carvedilol interact with any supplements?
Yes. Carvedilol has documented interactions with 211 supplements in our database — Eastern Red Cedar is not one of them. The Carvedilol 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

Eastern Red Cedar monograph Uses, safety profile, and every drug interaction in one place Carvedilol drug information The full plain-English guide to this medication Carvedilol supplement interactions Every supplement checked against Carvedilol, 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 4 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Carvedilol and Eastern Red Cedar?

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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.