Drug & supplement interaction

Calanus Oil + Linaclotide

Linaclotide brand name: Linzess.

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 Calanus Oil and Linaclotide 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 Linaclotide states a food rule worth keeping to.

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Interaction report

Calanus Oil and Linaclotide

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 Linaclotide and Calanus Oil 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 Calanus Oil at all — not against Linaclotide, 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.

Calanus Oil safety at a glance

Calanus Oil overall Use caution Generally well tolerated in early studies, but long-term safety data in people are limited.
Pregnancy Avoid There is not enough safety information, so it is best to avoid during pregnancy.
Breastfeeding Avoid Safety during breastfeeding has not been established, so avoid unless your doctor advises otherwise.

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

Still wondering about combining Linaclotide and Calanus Oil? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
What to actually watch for

What Calanus Oil Itself Has Been Linked To

This is not an interaction — nothing below involves Linaclotide. It is the side-effect record for Calanus Oil on its own, from the licensed Natural Medicines monograph. If something new turns up after you add Calanus Oil, this list is the first place to look.

  • A skin rash Additional detail

    “Calanus oil seems to be well tolerated. In one safety study, taking calanus oil for 12 months was reported to cause a higher rate of mild atopic dermatitis (eczema) when compared with placebo.”

    Calanus Oil · Natural Medicines adverse-effect record, reported in dermatitis.

    3 sources cited
    1. 97880. Cook CM, Larsen TS, Derrig LD, Kelly KM, Tande KS. Wax ester rich oil from the marine crustacean, Calanus finmarchicus, is a bioavailable source of EPA and DHA for human consumption. Lipids. 2016;51(10):1137-1144.
    2. 97881. Tande KS, Vo TD, Lynch BS. Clinical safety evaluation of marine oil derived from Calanus finmarchicus. Regul Toxicol Pharmacol. 2016;80:25-31. PubMed
    3. 105408. Dadová K, Petr M, Steffl M, et al. Effect of calanus oil supplementation and 16 week exercise program on selected fitness parameters in older women. Nutrients. 2020 Feb 14;12(2):481. PubMed

    “Orally, calanus oil is associated with more reports of mild atopic dermatitis (eczema) over a 12-month period when compared with placebo.”

    Calanus Oil · Natural Medicines adverse-effect record, reported in dermatitis.

    1 source cited
    1. 97881. Tande KS, Vo TD, Lynch BS. Clinical safety evaluation of marine oil derived from Calanus finmarchicus. Regul Toxicol Pharmacol. 2016;80:25-31. PubMed

Everything above comes from the Natural Medicines adverse-effect record for Calanus Oil — expand a row for the licensed statement it rests on. We read the ADVERSE REACTIONS section of Linaclotide’s FDA label too, and the two lists don’t meaningfully overlap — which is why no Linaclotide column appears here.

How to take them

Some Linaclotide Products Have a Food Rule — Calanus Oil Should Not Break It

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

Preparation and Administration Instructions • Take LINZESS on an empty stomach, at least 30 minutes prior to a meal at approximately the same time each day.

From the Dosage and Administration section of the FDA label we read for Linaclotide — where that label names a specific product, the instruction is that product's. See the Linaclotide drug page ›

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 Calanus Oil or Linaclotide

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

This page covers Calanus Oil only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Linaclotide 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 Linaclotide page

“Linaclotide (Linzess) treats IBS with constipation by acting inside the intestine itself, so the capsule's contents have to reach the gut unbound to do their job. That is exactly what the 17 supplements on this page can interfere with, and I would read the list with genuine care.”

Reviewed by 2 · Jul 18, 2026

Open the Linaclotide interaction page

How much people look this up

Where Calanus Oil and Linaclotide 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 Calanus Oil
Steady interest

#1,236 of 1,452 supplements looked up here in the last 7 days

29 days ago today
Medication Linaclotide
Steady interest

#1,720 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 Calanus Oil reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The Calanus Oil and Linaclotide 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 Calanus Oil

What is Calanus Oil?

  • Heart and metabolic health
  • Source of omega-3 fatty acids
  • Anti-inflammatory support
  • General wellness
  • Exercise and weight management

Calanus oil is a marine omega-3 oil made from a small Arctic zooplankton (Calanus finmarchicus). It is rich in omega-3 fatty acids bound in a unique 'wax ester' form, and early research suggests possible benefits for metabolic and heart health, but the evidence is still preliminary. Talk with your pharmacist or doctor before using it, especially if you have a seafood allergy or are pregnant.

Calanus finmarchicus · Calanidae · Oil extracted from the whole copepod (a tiny marine zooplankton) · Softgel capsules, oil

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

Calanus Oil: dosing

There is no official, standardized dose of calanus oil. Studies have used a fairly small daily amount, often just a gram or two per day, but products and concentrations vary.The best approach is to follow the dose printed on the product label and not exceed it.

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

Read the full Calanus Oil monograph & all interactions
Medication

About Linaclotide

What Is Linaclotide Used For?

Brand name: Linzess

Linzess (linaclotide) treats three related conditions that cause difficult, infrequent bowel movements. In adults, it is approved for irritable bowel syndrome with constipation (IBS-C) and chronic idiopathic constipation (CIC — ongoing constipation with no identified cause). In children ages 7 and older, Linzess is approved for IBS-C. In children ages 2 and older, Linzess is approved for functional constipation (FC).

Most-Reported Side Effects for Linaclotide

From FAERS, the FDA’s public side-effect reporting system (26,525 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.

Diarrhea 4,703 reports
Constipation 1,998 reports
Nausea 1,476 reports
Fatigue 1,171 reports
Abdominal distension 1,170 reports
See full Linaclotide drug information
Keep checking

Other Drugs & Calanus Oil

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

See the full Calanus Oil interactions page
See every supplement checked against Linaclotide, ranked by severity
Evidence & sources

Calanus Oil References

The 3 references that drive our Calanus Oil 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. Cook CM, Larsen TS, Derrig LD, Kelly KM, Tande KS. Wax ester rich oil from the marine crustacean, Calanus finmarchicus, is a bioavailable source of EPA and DHA for human consumption. Lipids. 2016;51(10):1137-1144.
  2. Tande KS, Vo TD, Lynch BS. Clinical safety evaluation of marine oil derived from Calanus finmarchicus. Regul Toxicol Pharmacol. 2016;80:25-31. PubMed
  3. Dadová K, Petr M, Steffl M, et al. Effect of calanus oil supplementation and 16 week exercise program on selected fitness parameters in older women. Nutrients. 2020 Feb 14;12(2):481. 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 Calanus Oil and Linaclotide Together: Common Questions

Is it safe to take Calanus Oil with Linaclotide?
We do not list a known interaction between Calanus Oil and Linaclotide. 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 Calanus Oil and Linaclotide at the same time of day?
At least one FDA label for a product containing Linaclotide 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 Linaclotide on its own and move Calanus Oil 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 Linaclotide interact with any supplements?
Yes. Linaclotide has documented interactions with 17 supplements in our database — Calanus Oil is not one of them. The Linaclotide 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

Calanus Oil monograph Uses, safety profile, and every drug interaction in one place Linaclotide drug information The full plain-English guide to this medication Linaclotide supplement interactions Every supplement checked against Linaclotide, 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 3 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Linaclotide and Calanus Oil?

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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.