Drug & supplement interaction

Purple Nut Sedge + Olanzapine

Olanzapine brand name: Zyprexa.

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 Olanzapine 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.

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Interaction report

Purple Nut Sedge and Olanzapine

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 Olanzapine 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 Olanzapine and Purple Nut Sedge? Ask Dr. Brian Staiger, PharmD, BCPS directly ›
How we checked

Why No Interaction Is Listed for Olanzapine

Interactions in our licensed database are recorded against drug classes, not just single drug names. Olanzapine is filed under 9 classifications — including antipsychotic drugs, serotonergic drugs, serotonergic 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 Olanzapine’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 — Olanzapine 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. Olanzapine)
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 Olanzapine’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 Olanzapine’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. 9 of them are worth acting on rather than waiting out — marked below.

  • Memory problems Worth acting on
  • Yellowing of the skin or eyes Worth acting on
  • Confusion Worth acting on
  • Chest pain Worth acting on
  • Low mood Worth acting on
  • Raised blood pressure Worth acting on
  • Shortness of breath Worth acting on
  • Bleeding or bruising Worth acting on
  • A higher chance of infection Worth acting on
  • Weight gain mentioned in 6.3% of FDA reports for Olanzapine

Showing the 10 most notable of 40 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 Olanzapine. Read the label on DailyMed › Where a percentage is shown, it is the share of 109,181 voluntary FDA FAERS reports for Olanzapine 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.

From our Q&A

Questions About Purple Nut Sedge or Olanzapine

These are real questions from readers, answered by the pharmacists at HelloPharmacist — written by a person, not generated from a database. Each one covers Purple Nut Sedge or Olanzapine, 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 Olanzapine

This page covers Purple Nut Sedge only. If you take other supplements — a multivitamin, a sleep aid, something for joints — the Olanzapine page lists 160 supplements it has a documented interaction with, worst first, each one explained.

The most serious there right now: Activated Charcoal (major), Indian Snakeroot (major), Lithium (major), Rauvolfia Vomitoria (major) and 1,3-dmaa (moderate).

By severity: 4 major · 118 moderate · 38 minor.

From our pharmacist’s overview on the Olanzapine page

“Olanzapine (Zyprexa) is an antipsychotic prescribed for schizophrenia and bipolar disorder, and adding supplements to it warrants genuine care. Four of the 160 ingredients on file rate major, and those four deserve your attention before anything else: lithium supplements raise the risk of serotonin syndrome, activated charcoal can trap…”

Reviewed by 2 · Jul 18, 2026

Open the Olanzapine interaction page

How much people look this up

Where Purple Nut Sedge and Olanzapine 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

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

29 days ago today
Medication Olanzapine
Top half

#1,203 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 Olanzapine 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 Olanzapine

What Is Olanzapine Used For?

Brand name: Zyprexa

Olanzapine treats schizophrenia and the manic or mixed episodes of bipolar I disorder in both adults and adolescents (ages 13–17). It can also be used alongside valproate or lithium to treat manic or mixed episodes in adults. When combined with fluoxetine, olanzapine tablets and orally disintegrating tablets are used to treat depressive episodes associated with bipolar I disorder and treatment-resistant depression in adults.

Olanzapine intramuscular injection (short-acting) is used by healthcare providers to quickly calm acute agitation in adults with schizophrenia or bipolar I mania. Zyprexa Relprevv — a separate, long-acting intramuscular formulation available only through a restricted program — is indicated specifically for the treatment of schizophrenia in adults.

Most-Reported Side Effects for Olanzapine

From FAERS, the FDA’s public side-effect reporting system (109,181 reports, all brands). Reports are voluntary and are not proof the drug caused the effect.

Weight increased 6,931 reports
Diabetes mellitus 5,413 reports
Toxicity to various agents 4,207 reports
Nausea 4,139 reports
Somnolence 4,133 reports
See full Olanzapine 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 Olanzapine, 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 Olanzapine Together: Common Questions

Is it safe to take Purple Nut Sedge with Olanzapine?
We do not list a known interaction between Purple Nut Sedge and Olanzapine. 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 Olanzapine combination checked?
Interactions in our licensed database are recorded against drug classes. Olanzapine is filed under 9 classifications, and Purple Nut Sedge has documented interactions with 4 drug classes — none of Olanzapine'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 — Olanzapine 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 Olanzapine interact with any supplements?
Yes. Olanzapine has documented interactions with 160 supplements in our database — Purple Nut Sedge is not one of them. The Olanzapine 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 Olanzapine drug information The full plain-English guide to this medication Olanzapine supplement interactions Every supplement checked against Olanzapine, 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 Olanzapine and Purple Nut Sedge?

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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.