Herb & supplement monograph

Norway Spruce Drug Interactions, Uses, Effectiveness, Safety & More

Medically reviewed by ·Updated June 2026
What is this page for?

First and foremost: how Norway Spruce interacts with medications. The heart of this page is the interaction list — every drug Norway Spruce is known to interact with, and how serious each one is.

But these pages have grown well beyond that into a full monograph — what Norway Spruce is, what people use it for and how strong the evidence is, its safety and side effects, and answers to the questions we’re asked most — written and reviewed by the clinical staff at HelloPharmacist. It’s educational information from our licensed clinical databases, not medical advice, and we don’t sell or endorse products. Our editorial policy

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Interaction report

Drugs that interact with Norway Spruce

0 medications have a known interaction with Norway Spruce, graded by severity. Select any drug for the full evidence-based detail.

We don’t currently list any known drug interactions for Norway Spruce. This doesn’t guarantee none exist — always confirm with your pharmacist before combining supplements with your medications.

Read The List Like a Pharmacist

What Severity, Likelihood & Evidence Mean

Severity — How Serious It Can Be

  • Major. Clinically significant; generally best avoided, or used only under direct professional supervision.
  • Moderate. May need monitoring, a dose adjustment, or separating the times you take each one.
  • Minor. Generally not clinically significant, but still worth noting and mentioning to your pharmacist.
  • No known interaction. Checked against our sources with nothing documented — not the same as proven safety.

Likelihood — How Well It’s Documented

  • Likely. Well-controlled human studies have demonstrated the likely existence of this interaction
  • Probable. Interaction has not been documented in well-controlled studies, however, the interaction has been demonstrated in some small human studies or in controlled animal studies in conjunction with multiple case reports.
  • Possible. Interaction has been documented in animal or in lab research, or the interaction has been documented in humans but is limited to case reports or conflicting clinical research exists
  • Unlikely. Interaction has been demonstrated in animal or in lab research but has been shown not to occur in humans.

Where This Data Comes From

  • Interaction records are evidence-graded and sourced from the Natural Medicines database (TRC Healthcare), the same reference used by pharmacists and hospitals.
  • Each drug listed above links to the full report for that exact Norway Spruce combination — clinical detail, likelihood, evidence level, and citations.
  • Content is reviewed by licensed HelloPharmacist pharmacists — see our data sources and editorial standards.
Monograph

Norway Spruce: Uses, Safety & Side Effects

Medically reviewed by · Reviewed June 2026 ·
The bottom line

Norway Spruce is an evergreen tree whose needles, shoots, bark, and essential oil have long been used in traditional medicine for coughs, congestion, and sore muscles. Solid human research is very limited, so most uses rest on tradition and lab studies. Use it cautiously, especially the concentrated essential oil, and talk to your pharmacist or doctor before using it medicinally.

Scientific name
Picea abies
Family
Pinaceae
Part used
Needles, young shoots, bark, resin, and essential oil
Common forms
Essential oil, tea (from needles or shoots), syrup, extracts, and topical balms
People commonly use it for
  • Coughs and chest congestion
  • Sore muscles and joint discomfort
  • Inhalation for stuffy nose
  • Antimicrobial and wound care (traditional)
  • Mild antioxidant support

Popular and traditional uses — not proof it works. See “Uses & effectiveness” below for the evidence.

Safety at a glance
OverallUse caution

Generally tolerated in food amounts, but the essential oil is concentrated and can irritate skin or airways.

PregnancyInsufficient reliable information

Insufficient reliable information available; avoid using.

Read the full pregnancy detail
BreastfeedingInsufficient reliable information

Insufficient reliable information available; avoid using.

Read the full breastfeeding detail

Pregnancy & breastfeeding ratings are from Natural Medicines (Therapeutic Research Center). Safety guidance is general; always confirm with your pharmacist or doctor for your situation.

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Overview

Norway Spruce (Picea abies) is a tall evergreen conifer native to northern and central Europe and widely planted elsewhere, including as a popular Christmas tree. It belongs to the pine family and is known for its long, drooping cones and dark green needles.

People have used different parts of the tree for centuries in folk medicine. The needles and young spring shoots are made into teas, syrups, and extracts. The resin and bark have been used in salves, and the essential oil distilled from the needles is used in aromatherapy and topical rubs.

Today you may find Norway Spruce in cough syrups, inhalation products, muscle balms, and as a fragrant essential oil. It is also used in foods and beverages as a flavoring.

How it works

Norway Spruce contains aromatic compounds called terpenes (such as pinene and limonene) in its needles and essential oil. These give it the fresh, piney scent and may have mild antimicrobial and soothing effects when inhaled or applied to the skin.

The needles and shoots also contain vitamin C and polyphenol antioxidants, while the bark holds tannins and other plant compounds that have shown antioxidant activity in lab tests.

It is important to understand that most of this information comes from test-tube and animal research. How well these effects translate to real benefits in people is not well established.

Effectiveness

Does Norway Spruce work?

Here’s what the research actually shows for each use — graded by Natural Medicines and reviewed by .

Evidence overview · 2 uses evaluated
2 Insufficient evidence
How to read these evidence grades

Natural Medicines’ 7-point scale. We show each rating’s label word-for-word.

1EffectiveStrong, consistent evidence it works.
2Likely EffectiveGood evidence, though not yet conclusive.
3Possibly EffectiveSome evidence suggests a benefit.
4Possibly IneffectiveSome evidence it may not help.
5Likely IneffectiveFairly strong evidence it doesn’t help.
6IneffectiveStrong evidence it doesn’t work.
7Insufficient Reliable Evidence to RateToo little research to say either way.

For Norway Spruce, current evidence isn’t strong enough to rate any specific use. The conditions it has been studied for are listed below.

Also studied for 2 conditions — evidence insufficient to rate
Insufficient Reliable Evidence To Rate Pain (acute)
Rating & evidence shown verbatim from Natural Medicines

Although there has been interest in using oral and topical Norway spruce for acute pain, there is insufficient reliable information about the clinical effects of Norway spruce for this purpose.

Insufficient Reliable Evidence To Rate Respiratory tract infections
Rating & evidence shown verbatim from Natural Medicines

Although there has been interest in using oral Norway spruce for respiratory tract infections, including bronchitis, the common cold, and tuberculosis, there is insufficient reliable information about the clinical effects of Norway spruce for this purpose.

Source & disclaimer. Effectiveness ratings and evidence summaries are provided by Natural Medicines (Therapeutic Research Center) and shown as licensed. Where Natural Medicines hasn’t rated a use, HelloPharmacist’s pharmacists may add their own reviewed rating and evidence (each such entry is labeled). This is educational information, not medical advice — talk with your pharmacist or doctor before starting, stopping, or changing a supplement.

Safety & precautions

Small amounts of spruce needle or shoot tea, and use as a food flavoring, are generally considered low-risk for most healthy adults. The bigger concern is the essential oil, which is highly concentrated and should never be swallowed unless directed by a qualified professional.

Essential oils from conifers can irritate the skin, eyes, and airways. People with asthma or other breathing conditions should be careful with inhaled or strongly scented products, as they can sometimes trigger symptoms. Always dilute the essential oil before applying it to skin and do a small patch test first.

People with allergies to conifers or pine-family plants may react to spruce. Do not use spruce essential oil on or near the face of infants and young children, as conifer oils can cause breathing problems in them.

Because there is not enough safety information, avoid medicinal and essential oil use during pregnancy and breastfeeding. If you have a health condition or take medications, check with your pharmacist or doctor before using Norway Spruce products.

Side effects

When applied to the skin, the essential oil or resin may cause redness, rash, or irritation, especially if not diluted. Allergic skin reactions are possible in sensitive people.

Inhaling strong vapors may cause coughing or worsen asthma in some people. Swallowing essential oil is not recommended and can cause stomach upset, nausea, or more serious effects.

Mild teas and food amounts are usually well tolerated, but stop use and seek care if you develop signs of an allergic reaction such as swelling, hives, or trouble breathing.

Dosing

There is no standardized or well-established medicinal dose for Norway Spruce. Traditional use varies widely depending on whether you are using a tea, syrup, extract, or essential oil.

If you use a commercial product, follow the directions on the label exactly. Essential oils should always be diluted in a carrier oil for skin use and are not meant to be taken by mouth without professional guidance.

Because doses are not standardized and product strengths differ, it is wise to check with a pharmacist or doctor before starting, especially if you have a medical condition or take other medicines.

Pregnancy & Breastfeeding

Norway Spruce & Pregnancy

Insufficient reliable information

Insufficient reliable information available; avoid using.

Norway Spruce & Breastfeeding

Insufficient reliable information

Insufficient reliable information available; 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

Pregnancy & lactation ratings: Natural Medicines, Therapeutic Research Center

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.

Parts of this content are provided by the Therapeutic Research Center, LLC.

DISCLAIMER: Currently this does not check for drug-drug interactions. This is not an all-inclusive comprehensive list of potential interactions and is for informational purposes only. Not all interactions are known or well-reported in the scientific literature, and new interactions are continually being reported. Input is needed from a qualified healthcare provider including a pharmacist before starting any therapy. Application of clinical judgment is necessary.

© 2021 Therapeutic Research Center, LLC

Pharmacist Counseling Corner

Norway Spruce: Common Questions

What is Norway Spruce used for, and does it work?
People use Norway Spruce for a range of reasons, but according to the Natural Medicines database the current clinical evidence is insufficient to confirm it works for the specific conditions it has been studied for. See the graded list on this page, and talk to your pharmacist or doctor before relying on it for any condition.
Does Norway Spruce interact with prescription medications?
We do not currently list any known drug interactions for Norway Spruce. This does not guarantee that none exist, so always confirm with your pharmacist before combining it with your medications.
How are Norway Spruce interactions rated?
Each interaction is graded major, moderate, or minor based on how clinically significant it is and the strength of the evidence behind it. Major interactions are the most serious and are best avoided, or used only under close professional supervision.
Is it safe to take Norway Spruce with my medications?
It depends on the specific medication. Some combinations are fine, while others call for monitoring, timing changes, or should be avoided. Check your exact drug above and confirm with your pharmacist or doctor before starting, stopping, or changing anything.
Where does this Norway Spruce interaction information come from?
Our interaction data is built on the Natural Medicines database — an evidence-graded reference for vitamins, herbs, and supplements — and is reviewed by licensed HelloPharmacist pharmacists, who may add clinical context.
What is Norway Spruce used for?
It is traditionally used for coughs, chest and nasal congestion, and as a topical rub for sore muscles and joints. These uses are based mostly on tradition, not strong clinical proof.
Is Norway Spruce safe to take?
Small amounts in teas or as a food flavoring are generally low-risk for healthy adults, but the essential oil is concentrated and can irritate skin and airways. Never swallow the essential oil unless a qualified professional advises it.
Can I use Norway Spruce while pregnant or breastfeeding?
There isn't enough safety information, so it's best to avoid medicinal and essential oil use during pregnancy and breastfeeding. Talk to your doctor before using it.
Can I drink spruce needle tea?
Spruce needle tea has a long history of traditional use and is a milder form than the essential oil. Use modest amounts, make sure you have correctly identified the plant, and check with a pharmacist if you have health concerns.

Written and reviewed by the HelloPharmacist editorial staff. Our editorial policy

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