Drug & supplement interaction

Purple Nut Sedge + Lacosamide

Lacosamide brand names: Vimpat, Motpoly XR.

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 Purple Nut Sedge and Lacosamide 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

Purple Nut Sedge and Lacosamide

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 Lacosamide and Purple Nut Sedge 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.

Purple Nut Sedge safety at a glance

Purple Nut Sedge overall Use caution Traditional use is long, but high-quality human safety data are lacking.
Pregnancy Avoid Traditionally used to affect menstruation, so avoid during pregnancy.
Breastfeeding Avoid There is not enough safety information, so it is best avoided.

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

Still wondering about combining Lacosamide and Purple Nut Sedge? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
How we checked

Why No Interaction Is Listed for Lacosamide

Interactions in our licensed database are recorded against drug classes, not just single drug names. Lacosamide is filed under 3 classifications — cytochrome p450 2c9 (cyp2c9) substrates, cytochrome p450 3a4 (cyp3a4) substrates, oral drugs. Purple Nut Sedge has documented interactions with 4 drug classes — the most serious being anticholinergic drugs (moderate), anticoagulant/antiplatelet drugs (moderate) and antidiabetes drugs (moderate) — and none of Lacosamide’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

Purple Nut Sedge Does Interact With Other Medications

Purple Nut Sedge has 424 moderate known drug interactions in our database — Lacosamide isn’t one of them. If you take anything else, check it against the full list below.

Moderate 424 No known interaction 2,406 (incl. Lacosamide)
Taking anything else?

Check Another of Your Medications Against Purple Nut Sedge

Covers the 2,830 medications we’ve checked against Purple Nut Sedge. Pick one to open its full report.

What to actually watch for

What Lacosamide’s Own FDA Label Lists

This is not an interaction — none of it involves Purple Nut Sedge. These are the most notable effects listed in the ADVERSE REACTIONS section of Lacosamide’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. 5 of them are worth acting on rather than waiting out — marked below.

  • Seizures Worth acting on mentioned in 22.4% of FDA reports for Lacosamide
  • Unsteadiness Worth acting on
  • Fainting Worth acting on
  • A severe skin reaction Worth acting on
  • An allergic reaction Worth acting on
  • Blurred vision
  • Drowsiness mentioned in 4.0% of FDA reports for Lacosamide
  • Trouble sleeping
  • Dizziness mentioned in 4.5% of FDA reports for Lacosamide
  • Tiredness mentioned in 3.9% of FDA reports for Lacosamide

Showing the 10 most notable of 14 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 Lacosamide. Read the label on DailyMed › Where a percentage is shown, it is the share of 36,995 voluntary FDA FAERS reports for Lacosamide that mention that effect — a reporting proportion, not an incidence rate and not evidence the drug caused it. Purple Nut Sedge’s licensed record lists no adverse effects our clinical vocabulary could match, so there is no Purple Nut Sedge side to compare — that is a limit of the record, not a statement that Purple Nut Sedge has no side effects.

Everything else you take

See Every Supplement That Interacts With Lacosamide

This page covers Purple Nut Sedge only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Lacosamide page lists 151 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Grapefruit (major), St. John's Wort (major), Acacia Rigidula (moderate) and Adrafinil (moderate).

By severity: 3 major · 107 moderate · 41 minor.

From our pharmacist’s overview on the Lacosamide page

“If you take lacosamide (Vimpat, Motpoly XR) for seizures, start with the three major entries here: grapefruit, St. John's wort, and activated charcoal.”

Reviewed by 2 · Jul 18, 2026

Open the Lacosamide interaction page

How much people look this up

Where Purple Nut Sedge and Lacosamide 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 Purple Nut Sedge
Top half

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

29 days ago today
Medication Lacosamide
Steady interest

#1,480 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 Purple Nut Sedge reference on this page ↓
  • Freshness: we automatically re-check this combination every week — this pair was last verified September 20, 2026. The Purple Nut Sedge and Lacosamide 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 Purple Nut Sedge

What is Purple Nut Sedge?

  • Digestive upset and bloating
  • Menstrual cramps and irregular periods
  • Fever and inflammation
  • Skin and weight-related concerns
  • Antimicrobial uses

Purple nut sedge (Cyperus rotundus) is a common weed whose tubers have a long history in Ayurvedic, Chinese, and other traditional medicine systems, mostly for digestive and menstrual complaints. Modern human evidence is very limited, so its benefits remain unproven. If you want to try it, talk with a pharmacist or doctor first, and avoid it during pregnancy and breastfeeding.

Cyperus rotundus · Cyperaceae · Tubers (rhizomes) and essential oil · Powder, capsules, decoction (tea), essential oil, traditional herbal formulas

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

Purple Nut Sedge: dosing

There is no well-established or standardized dose for purple nut sedge. Traditional preparations vary widely, and the strength of capsules, powders, and oils differs from product to product.If you choose to use it, follow the directions on the product label and start low. A pharmacist can help you review the product and decide whether it is appropriate for you. Do not use the essential oil internally unless directed by a qualified professional.

From our Purple Nut Sedge monograph — the full record covers uses, side effects and every documented interaction.

Read the full Purple Nut Sedge monograph & all interactions
Medication

About Lacosamide

What Is Lacosamide Used For?

Brand names: Vimpat, Motpoly XR

Lacosamide is used to treat partial-onset seizures (seizures that start in one part of the brain) in adults and children. The age at which it is approved depends on the specific product: Vimpat tablets, oral solution, and injection are approved for partial-onset seizures in patients as young as 1 month old; most other formulations are approved from age 4 and up; and Motpoly XR is approved for patients weighing at least 50 kg.

Lacosamide is also used as adjunctive (add-on) therapy for primary generalized tonic-clonic seizures (grand mal seizures involving the whole brain) in adults and children 4 years of age and older, including Motpoly XR for patients weighing at least 50 kg.

Most-Reported Side Effects for Lacosamide

From FAERS, the FDA’s public side-effect reporting system (36,995 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.

Seizure 6,858 reports
Dizziness 1,669 reports
Somnolence 1,497 reports
Fatigue 1,446 reports
Epilepsy 1,418 reports
See full Lacosamide drug information
Keep checking

Other Drugs & Purple Nut Sedge

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

0Major
424Moderate
0Minor
2,405No known interaction
424 Moderate 2,405 No interaction
Moderate

424 interactions

Showing 60 of 424 moderate interactions — see all 424 on the Purple Nut Sedge page.

No interaction 2,405 drugs checked — show the list

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

Showing the 60 most looked-up of 2,405 medications checked with no known interaction — see the full Purple Nut Sedge list.

See the full Purple Nut Sedge interactions page
See every supplement checked against Lacosamide, ranked by severity
Evidence & sources

Purple Nut Sedge References

The 5 references that drive our Purple Nut Sedge 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. Seo EJ, Lee DU, Kwak JH, et al. Antiplatelet effects of Cyperus rotundus and its component (+)-nootkatone. J Ethnopharmacol. 2011;135(1):48-54. PubMed
  2. Raut NA, Gaikwad NJ. Antidiabetic activity of hydro-ethanolic extract of Cyperus rotundus in alloxan induced diabetes in rats. Fitoterapia. 2006;77(7-8):585-588. PubMed
  3. Sharma R, Gupta R. Cyperus rotundus extract inhibits acetylcholinesterase activity from animal and plants as well as inhibits germination and seedling growth in wheat and tomato. Life Sci. 2007;80(24-25):2389-2392. PubMed
  4. Sahib AS. Treatment of irritable bowel syndrome using a selected herbal combination of Iraqi folk medicines. J Ethnopharmacol 2013;148(3):1008-12. PubMed
  5. Mohammed GF. Topical Cyperus rotundus oil: a new therapeutic modality with comparable efficacy to Alexandrite laser photo-epilation. Aesthet Surg J. 2014;34(2):298-305. 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 Purple Nut Sedge and Lacosamide Together: Common Questions

Is it safe to take Purple Nut Sedge with Lacosamide?
We do not list a known interaction between Purple Nut Sedge and Lacosamide. 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 Purple Nut Sedge and Lacosamide combination checked?
Interactions in our licensed database are recorded against drug classes. Lacosamide is filed under 3 classifications, and Purple Nut Sedge has documented interactions with 4 drug classes — none of Lacosamide'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 Purple Nut Sedge interact with any other medications?
Yes. Purple Nut Sedge has 424 documented drug interactions in our database — Lacosamide 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 Lacosamide interact with any supplements?
Yes. Lacosamide has documented interactions with 151 supplements in our database — Purple Nut Sedge is not one of them. The Lacosamide 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

Purple Nut Sedge monograph Uses, safety profile, and every drug interaction in one place Lacosamide drug information The full plain-English guide to this medication Lacosamide supplement interactions Every supplement checked against Lacosamide, 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 5 citations behind this page Ask a pharmacist Free, personal answer from our licensed team

Still Have a Question About Lacosamide and Purple Nut Sedge?

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.