Drug & supplement interaction

Norway Spruce + Ivermectin

Ivermectin brand names: Stromectol, Mectizan, Sklice, Soolantra.

No Known Interaction
Medically reviewed by · Updated June 2026 · Pair last verified Sep 13, 2026
The bottom line No known interaction

We found no known interaction between Norway Spruce and Ivermectin 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 Ivermectin states a food rule worth keeping to.

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Interaction report

Norway Spruce and Ivermectin

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 Ivermectin and Norway Spruce 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 Norway Spruce at all — not against Ivermectin, 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.

Norway Spruce safety at a glance

Norway Spruce overall Use caution Generally tolerated in food amounts, but the essential oil is concentrated and can irritate skin or airways.
Pregnancy Avoid Not enough safety data; avoid medicinal or essential oil use during pregnancy.
Breastfeeding Avoid Safety is unknown while breastfeeding, so it is best avoided.

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

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

What Ivermectin’s Own FDA Label Lists

This is not an interaction — none of it involves Norway Spruce. These are the most notable effects listed in the ADVERSE REACTIONS section of Ivermectin’s own FDA label, for the medication by itself. Knowing the drug’s own list makes it easier to work out the likely cause if something new turns up while you take both. 10 of them are worth acting on rather than waiting out — marked below.

  • Loss of vision Worth acting on
  • Wheezing Worth acting on
  • Confusion Worth acting on
  • A severe skin reaction Worth acting on
  • Seizures Worth acting on
  • Chest pain Worth acting on
  • Anemia Worth acting on
  • Hives Worth acting on
  • A low white blood cell count Worth acting on
  • Liver problems Worth acting on

Showing the 10 most notable of 30 label-listed effects — ranked by how unusual each one is across medicines generally, with serious effects weighted up.

From the ADVERSE REACTIONS section of the FDA label for Ivermectin. Read the label on DailyMed › Where a percentage is shown, it is the share of 6,298 voluntary FDA FAERS reports for Ivermectin that mention that effect — a reporting proportion, not an incidence rate and not evidence the drug caused it. Norway Spruce’s licensed record lists no adverse effects our clinical vocabulary could match, so there is no Norway Spruce side to compare — that is a limit of the record, not a statement that Norway Spruce has no side effects.

How to take them

Some Ivermectin Products Have a Food Rule — Norway Spruce Should Not Break It

At least one FDA label for a product containing Ivermectin says to take it on an empty stomach. Most supplements — Norway Spruce included — are taken with a meal, so the easy mistake is swallowing both together at breakfast. Where that rule applies, keep Ivermectin on its own and move Norway Spruce to a meal later in the day.

This may not be true of your version. Food instructions belong to the product, not the ingredient: two Ivermectin 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.

Patients should take tablets on an empty stomach with water.

From the Dosage and Administration section of the FDA label we read for Ivermectin — 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 Norway Spruce or Ivermectin

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

This page covers Norway Spruce only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Ivermectin page lists 58 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), St. John's Wort (major), Sweet Orange (major), Bitter Melon (moderate) and Black Pepper (moderate).

By severity: 3 major · 37 moderate · 18 minor.

Open the Ivermectin interaction page

How much people look this up

Where Norway Spruce and Ivermectin 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 Norway Spruce
Steady interest

#1,347 of 1,452 supplements looked up here in the last 7 days

29 days ago today
Medication Ivermectin
Top 1%

#12 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.
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 13, 2026. The Norway Spruce and Ivermectin records this page draws on were last updated June 22, 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 Norway Spruce

What is Norway Spruce?

  • Coughs and chest congestion
  • Sore muscles and joint discomfort
  • Inhalation for stuffy nose
  • Antimicrobial and wound care (traditional)
  • Mild antioxidant support

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.

Picea abies · Pinaceae · Needles, young shoots, bark, resin, and essential oil · Essential oil, tea (from needles or shoots), syrup, extracts, and topical balms

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

Norway Spruce: 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.

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

Read the full Norway Spruce monograph & all interactions
Medication

About Ivermectin

What Is Ivermectin Used For?

Brand names: Stromectol, Mectizan, Sklice, Soolantra

Ivermectin tablets (including Stromectol) are used to treat two parasitic infections: strongyloidiasis (a roundworm infection of the intestinal tract) and onchocerciasis (river blindness, caused by a parasitic worm spread by blackfly bites). These are prescription uses for serious infections.

Topical ivermectin lotion — sold under several names including RID One and Done, Head Lice Treatment Ivermectin Lotion, Scalp Care Lotions, and others — is applied to the scalp to treat head lice. A separate topical ivermectin cream (1%), available as Soolantra and ivermectin cream 1%, is used to treat the inflammatory pimple-like bumps of rosacea.

Most-Reported Side Effects for Ivermectin

From FAERS, the FDA’s public side-effect reporting system (6,298 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.

Headache 647 reports
Asthenia 590 reports
Fever 485 reports
Pruritus 388 reports
Diarrhea 292 reports
See full Ivermectin drug information
Keep checking

Other Drugs & Norway Spruce

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

See the full Norway Spruce interactions page
See every supplement checked against Ivermectin, ranked by severity
Sources

Sources & How We Checked

We checked Norway Spruce against Ivermectin in the Natural Medicines interaction database and found no documented interaction on file. The medication overview comes from MedlinePlus, and supplement label details from the NIH Dietary Supplement Label Database.

Content is written and reviewed by licensed HelloPharmacist pharmacists. See our data sources and editorial standards for how this information is built and checked.

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

Keep exploring
Norway Spruce monograph › Uses, safety, and every drug interaction in one place Ivermectin supplement interactions › Every supplement checked against Ivermectin, ranked by severity Ivermectin drug information › The full plain-English guide to this medication Supplement interaction checker › Check any supplement or product against your medications Browse medications A–Z › Every drug we've checked against herbs & supplements Ask a pharmacist › Free, personal answer from our licensed team
Pharmacist Counseling Corner

Taking Norway Spruce and Ivermectin Together: Common Questions

Is it safe to take Norway Spruce with Ivermectin?
We do not list a known interaction between Norway Spruce and Ivermectin. 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.
Should I take Norway Spruce and Ivermectin at the same time of day?
At least one FDA label for a product containing Ivermectin says to take it on an empty stomach, and supplements are usually taken with a meal — so taking them together at breakfast is the easy mistake. Where that applies, keep Ivermectin on its own and move Norway Spruce to a meal later in the day. Food instructions belong to the product rather than the ingredient, so check the directions on your own box. This is about absorption, not an interaction.
Does Ivermectin interact with any supplements?
Yes. Ivermectin has documented interactions with 58 supplements in our database — Norway Spruce is not one of them. The Ivermectin interaction page linked on this page lists every one, ranked by severity.

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

Still Have a Question About Ivermectin and Norway Spruce?

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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.