Drug & supplement interaction

Sea Moss + Sumatriptan

Sumatriptan brand name: Tosymra.

No Known Interaction

Medically reviewed by Dr. Brian Staiger, PharmD, BCPS · Updated July 2026 · Pair last verified Sep 13, 2026

The bottom line No known interaction

We found no known interaction between Sea Moss and Sumatriptan 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.

Know someone taking this? Share

Facebook Post Reddit Email

On this page

Interaction report

Sea Moss and Sumatriptan

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 Sumatriptan and Sea Moss 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.

Sea Moss safety at a glance

Sea Moss overall Use caution Generally seen as food, but variable iodine levels and possible heavy-metal content warrant caution.

Pregnancy Likely Safe When used in food amounts. There is insufficient reliable information available about the safety of using larger amounts; avoid using. Read the full pregnancy detail

Breastfeeding Likely Safe When used in food amounts. There is insufficient reliable information available about the safety of using larger amounts; avoid using. Read the full breastfeeding detail

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 Sumatriptan and Sea Moss? Ask Dr. Brian Staiger, PharmD, BCPS directly ›

How we checked

Why No Interaction Is Listed for Sumatriptan

Interactions in our licensed database are recorded against drug classes, not just single drug names. Sumatriptan is filed under 4 classifications — including qt interval-prolonging drugs, serotonergic drugs, serotonergic drugs. Sea Moss has documented interactions with 3 drug classes — the most serious being amiodarone (cordarone) (moderate), antithyroid drugs (moderate) and thyroid hormone (moderate) — and none of Sumatriptan’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

Sea Moss Does Interact With Other Medications

Sea Moss has 22 moderate known drug interactions in our database — Sumatriptan isn’t one of them. If you take anything else, check it against the full list below.

Moderate 22 No known interaction 2,808 (incl. Sumatriptan)

Taking anything else?

Check Another of Your Medications Against Sea Moss

Covers the 2,830 medications we’ve checked against Sea Moss. Pick one to open its full report.

What to actually watch for

What Sea Moss Itself Has Been Linked To

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

Constipation / Diarrhea Additional detail
“Orally, see moss has been reported to cause constipation and diarrhea in one observational study.”

Sea Moss · Natural Medicines adverse-effect record, reported in constipation.
1 source cited

109121. Palmieri B, Vadalà M, Laurino C. Clinical effects of overwintered-stressed Chondrus Crispus and non-overwintered-stressed Chondrus crispus dietary supplementations. Asian J Med Sci. 2018; 9(6): 7-13. DOI

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

Special populations

Sea Moss in Pregnancy & Breastfeeding

Pregnancy And Lactation Likely Safe

When used in food amounts. There is insufficient reliable information available about the safety of using larger amounts; 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

From our Q&A

Questions About Sea Moss or Sumatriptan

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

This page covers Sea Moss only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Sumatriptan page lists 50 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), American Hellebore (major), Arsenic (major), Cesium (major) and Ephedra (major).

By severity: 8 major · 31 moderate · 11 minor.

From our pharmacist’s overview on the Sumatriptan page

“The supplement risk that matters most with sumatriptan (Tosymra) is serotonin overload. This migraine drug works through serotonin receptors, and 20 of the 50 interacting ingredients on file, 5-HTP among them, can push serotonin activity higher still, raising the risk of serotonin syndrome (agitation, racing heart, fever).”

Reviewed by 2 · Jul 18, 2026

Open the Sumatriptan interaction page

How much people look this up

Where Sea Moss and Sumatriptan 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 Sea Moss

Top half

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

29 days ago today

Medication Sumatriptan

Top 5%

#37 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 Sea Moss reference on this page ↓
Freshness: we automatically re-check this combination every week — this pair was last verified September 13, 2026. The Sea Moss and Sumatriptan 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 Dr. Brian Staiger, PharmD, BCPS.

Supplement

About Sea Moss

What is Sea Moss?

Source of iodine and minerals
Thyroid support
Respiratory issues and cough
Digestive support
Skin and hair health
General immune and antioxidant support

Sea moss is a type of red seaweed that is naturally rich in iodine and several minerals, and it is popular as a 'whole-food' supplement. Strong human evidence for most of its health claims is lacking, and its high and variable iodine content can be a real concern, especially for people with thyroid problems. Talk to your pharmacist or doctor before using it, particularly if you are pregnant, breastfeeding, or have a thyroid condition.

Chondrus crispus · Gigartinaceae · Whole dried seaweed (thallus) · Gel, dried raw seaweed, capsules, powder, gummies, drinks, skin products

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

Sea Moss: dosing

There is no established, standardized dose for sea moss. Iodine content varies widely between products, which makes consistent dosing difficult and increases the risk of getting too much.If you choose to use it, follow the directions on the product label and start low.

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

Read the full Sea Moss monograph & all interactions

Medication

About Sumatriptan

What Is Sumatriptan Used For?

Brand name: Tosymra

Sumatriptan is used to stop a migraine headache once it starts — with or without aura (the visual or sensory warning signs some people get before a migraine). It is available as tablets, nasal sprays, nasal capsules, and subcutaneous (under-the-skin) injections for this purpose.

Sumatriptan subcutaneous injections (brands: Imitrex injection, Sumatriptan Injection, Sumatriptan Succinate Injection) are also approved to treat acute cluster headaches in adults. Sumatriptan is not used to prevent migraines or cluster headaches — it only treats attacks once they begin.

Most-Reported Side Effects for Sumatriptan

From FAERS, the FDA’s public side-effect reporting system (46,096 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.

Headache 3,911 reports

Nausea 3,510 reports

Migraine 3,445 reports

Fatigue 2,617 reports

Dizziness 2,121 reports

See full Sumatriptan drug information

Keep checking

Other Drugs & Sea Moss

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

0Major

22Moderate

0Minor

2,807No known interaction

22 Moderate 2,807 No interaction

Moderate

22 interactions

No interaction 2,807 drugs checked — show the list

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

Showing the 60 most looked-up of 2,807 medications checked with no known interaction — see the full Sea Moss list.

See the full Sea Moss interactions page

See every supplement checked against Sumatriptan, ranked by severity

Evidence & sources

Sea Moss References

The 3 references that drive our Sea Moss 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.

Darias-Rosales J, Rubio C, Gutiérrez ÁJ, Paz S, Hardisson A. Risk assessment of iodine intake from the consumption of red seaweeds (Palmaria palmata and Chondrus crispus). Environ Sci Pollut Res Int 2020;27(36):45737-45741. PubMed
U.S. Department of Agriculture (USDA). Agricultural Research Service. FoodData Central. Seaweed, irishmoss, raw. April 2019. Available at: https://fdc.nal.usda.gov/fdc-app.html#/food-details/168456/nutrients. Accessed Aug. 30, 2022.
Palmieri B, Vadalà M, Laurino C. Clinical effects of overwintered-stressed Chondrus Crispus and non-overwintered-stressed Chondrus crispus dietary supplementations. Asian J Med Sci. 2018; 9(6): 7-13. DOI

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 Sea Moss and Sumatriptan Together: Common Questions

Is it safe to take Sea Moss with Sumatriptan?

We do not list a known interaction between Sea Moss and Sumatriptan. 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.

How was the Sea Moss and Sumatriptan combination checked?

Interactions in our licensed database are recorded against drug classes. Sumatriptan is filed under 4 classifications, and Sea Moss has documented interactions with 3 drug classes — none of Sumatriptan'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 Sea Moss interact with any other medications?

Yes. Sea Moss has 22 documented drug interactions in our database — Sumatriptan 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 Sumatriptan interact with any supplements?

Yes. Sumatriptan has documented interactions with 50 supplements in our database — Sea Moss is not one of them. The Sumatriptan 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

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

Our pharmacists answer your medication & supplement questions — free.

Ask a pharmacist

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.