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Herklin Piperonyl butoxide and Pyrethrum extract 40 mg/mL; .033 mg/mL Shampoo — NDC 75940-171-04 (Billing 75940-0171-04)

by MarcusUSA · 1 BOTTLE in 1 CARTON / 236 mL in 1 BOTTLE

This is a package of Herklin Piperonyl butoxide and Pyrethrum extract 40 mg/mL; .033 mg/mL Shampoo from MarcusUSA, marketed since Oct 2017 and currently FDA-listed. It is this product's only package size.

NDC 75940-0171-04
🏷️ FDA NDC (as labeled) 75940-171-04 billing pads the product segment with a zero
OTC On market Non-controlled ⇄ Compare with another NDC
🗂️ FDA directory synced Oct 1, 2026 · this listing last changed Jul 24, 2026 · sources: openFDA · FDA label (DailyMed) · FDA Orange & Purple Book · First Databank · CMS NADAC, ASP, Medicare & Medicaid · RxNorm
📋 All sources & update times →

This page is curated, coded, and maintained by

Compiled from public FDA, CMS, DailyMed, NADAC, and related drug data sources. Editorial policy

NDC database record

One package, one record: these facts belong to NDC 75940-171-04 alone.

Record
FDA NDC Directory package listing · Human OTC drug
Code segments
75940 labeler · 171 product · 04 package
Package marketed since
Oct 29, 2017
Sample package
No — commercial package
Listing certified through
Dec 31, 2026
Barcode (UPC)
0375940000183
FDA record last changed
Jul 24, 2026

Identity & classification

Regulatory identifiers FDA, NLM and CMS codes for this package

FDA NDC (as labeled) 75940-171-04
Product NDC 75940-171
11-digit billing NDC 75940017104
UNII LWK91TU9AH, ZUM06L90GV
UPC 0375940000183
Application # part358G
SPL Set ID 908f9a80-d1cf-448e-8e35-e4dc856e0e99
DEA schedule Non-controlled
Marketing category OTC MONOGRAPH FINAL
Marketing status On market
FDA listing status Listed (active directory)
Marketing start 2017-10-29
Route TOPICAL
Dosage form SHAMPOO
Substance PIPERONYL BUTOXIDE; PYRETHRUM EXTRACT
Why two NDCs? The FDA registers this code as 75940-171-04 — a 5-3-2 layout, and that's what's printed on the package and shown on DailyMed. For insurance claims, every NDC is standardized to a uniform 11-digit 5-4-2 format by adding a zero to the product segment → 75940-0171-04. Same drug, same package — only the format differs.
Where does this data come from?
Identifiers from the FDA openFDA NDC Directory and Structured Product Labeling; RxCUI from RxNorm (NLM); GPI from Medi-Span; GCN / HIC / AHFS / legend from First Databank.

Clinical

🧪 What is this product?

Herklin is a topical shampoo marketed as an over-the-counter product under FDA's OTC monograph rules. It contains pyrethrum extract, a botanical insecticide, and piperonyl butoxide, which is typically used to enhance the activity of pyrethrum and other insecticides. This combination is commonly found in products intended for topical use against lice and other parasitic insects.

Supplement & herbal interactions

🌿 Drug–supplement interaction checker →
Where does this data come from?
Plain-language summary from MedlinePlus (U.S. National Library of Medicine); supplement & herbal interactions and nutrient depletion data from the Natural Medicines database; our full guide is HelloPharmacist editorial content.

Pricing

A drug doesn't have one price. Each row is a different public payment system, and none is what you'd pay at the counter — that depends on your insurance. The ⓘ on each row explains what it measures.

Price systemPer gPer package
Retail pharmacies payNADAC · weekly Not in the retail survey — common for institutional, discontinued, or low-volume packs.
Medicaid paysCMS SDUD · 12 mo No recent Medicaid claims on file for this NDC — rare and low-volume NDCs are suppressed in the public data.
Medicare drug plans payPart D · quarterly No Part D plan price is available for this NDC in our data.
ℹ️
No price is published for this exact package yet. CMS surveys NADAC per package size, so a different pack of the same drug often has one.
Where does this data come from?
NADAC (National Average Drug Acquisition Cost) is the CMS weekly pharmacy-acquisition-cost survey — what pharmacies pay. ASP (Average Sales Price) is the CMS Medicare Part B drug-payment file, published quarterly. Medicaid pays is computed by us from CMS State Drug Utilization Data (total reimbursed ÷ units, trailing 12 months) — gross of rebates and inclusive of dispensing fees, so it reflects what Medicaid paid, not an acquisition cost. Medicare drug plans pay is the median negotiated point-of-sale unit cost across plans listing this NDC in the CMS quarterly Prescription Drug Plan pricing files, before rebates. The VA pays is the federal contract price (FSS, and the statutory Big 4 ceiling where listed) from the VA National Acquisition Center pharmaceutical price file. All are free public government data; each measures a different payer, so the figures are not directly comparable.

Packaging — all sizes for this product

Package NDCDescription Marketing startMarketing endStatus
75940-0171-04 You're viewing this Main listing 1 BOTTLE in 1 CARTON / 236 mL in 1 BOTTLE 2017-10-29 — Active

Therapeutic equivalents

ProductLabelerPackNADAC/unitTEStatusPrice vs. this
Herklin 40 mg/mL; .033 mg/mLthis 75940-0171-04 MarcusUSA 1 bottle — — FDA listed —
RID Lice Killing 40 mg/mL; .033 mg/mL 82392-0100-02 Oystershell 1 bottle — — FDA listed —
About this product: other versions of the same ingredient, strength and form are listed above, least expensive first, with FDA equivalence ratings where available.
Where does this data come from?
Equivalents are other NDCs of the same ingredient, form and route from the openFDA NDC Directory, ranked least-expensive-first by NADAC. Therapeutic-equivalence (AB) ratings come from the FDA Orange Book; biologics use the FDA Purple Book for biosimilar & interchangeable status.

Availability & generic status

🏛️
2017
On the market since
Oct 2017
📍
2026
Currently FDA-listed
9 years listed
🔒
·
No generic listed yet
brand only
ℹ️No FDA-approved generic found

We did not find an FDA-approved generic match for this exact strength, form and route.

Where does this data come from?
Patents and exclusivity from the FDA Orange Book (small-molecule drugs), refreshed from public FDA data. Generic launch timing is an estimate, not a guarantee.

Inactive Ingredients / Excipients

Inactive ingredients, also called excipients, are components of the drug product other than the active ingredient. They may include fillers, dyes, coatings, preservatives, flavors, or other formulation ingredients.

💡 Tap an ingredient (hover on desktop) to see what it is and why it’s used.

  • UNII 3K9958V90M
    A liquid solvent derived from fermentation or chemical synthesis. In medicines, alcohol dissolves active ingredients, helps preserve the product, and improves how the body absorbs certain drugs.
  • UNII 0ZNO9PJJ9J
    A synthetic ingredient derived from castor oil that has been chemically modified with polyethylene glycol. It acts as a solubilizer and emulsifier to help mix oil-based and water-based components in the medicine.
  • UNII L45WU8S981
    A synthetic polymer derived from cellulose, polyquaternium-10 acts as a thickener and film-former in liquid formulations. It increases viscosity for better texture and helps the product adhere to or coat skin or mucous membranes.
  • UNII 059QF0KO0R
    Water is a liquid solvent that dissolves and mixes ingredients together in liquid medicines, syrups, and injections. It helps distribute the active drug evenly throughout the product.

4 inactive ingredients listed in the exact product block matched to this NDC.

The official label also statesammonium laureth sulfate, fragrance, PEG-25 hydrogenated castor oil, polyquaternium-10, purified water, SD-40 alcohol

Label-section wording can be broader than the structured product block and may mention additional formulation ingredients.

Where does this data come from?
Data sourced from official FDA Structured Product Labeling (SPL) via DailyMed — ingredient classCode="IACT" elements from the exact product block matched by this NDC. Label-section narrative from DailyMed / the openFDA label index is shown separately when available.

Inactive ingredient FAQ

Are inactive ingredients the same for every manufacturer?
No. Inactive ingredients can differ by manufacturer, dosage form, strength, and package / product version.
Why might an inactive ingredient be missing?
Some SPLs do not provide a complete structured inactive-ingredient list, and older or unusual labels may only include the information in narrative text.
Can inactive ingredients matter?
Yes. They can matter for allergies, intolerances, dyes, gluten / lactose concerns, preservatives, and formulation differences — but confirm with a pharmacist or the manufacturer when it’s clinically important.

Manufacturer & labeler

LabelerMarcusUSA
FDA applicationpart358G (OTC MONOGRAPH FINAL)
Labeler code75940
First marketedOct 2017
Product typeHuman Otc Drug

More NDCs from MarcusUSA labeler code 75940

The labeler markets the product; the application holder owns the FDA approval. They’re often the same company but can differ (e.g. a repackager or an authorized generic). A mailing address / phone appears here when the manufacturer includes it in the product’s FDA label (not all do).
Where does this data come from?
Labeler, application holder and registered establishment from the FDA openFDA NDC Directory and Drugs@FDA; address/contact from the product’s FDA label.

FDA label — Drug Facts FDA SPL

The complete FDA label for this product — the official Drug Facts labeling, verbatim, section by section. Jump with a chip, search within the label, or expand everything.
🎯 Indications and Usage ⏱️ Dosage and Administration ⚠️ Warnings 📦 Storage and Handling 🧪 Active Ingredient 🧪 Inactive Ingredients 🎯 Purpose 📄 Do Not Use 📄 Ask a Doctor Before Use If 📄 When Using This Product 📄 Stop Use and Ask a Doctor If 📄 Keep Out of Reach of Children 📄 Questions or Comments 📄 Package Label / Principal Display Panel
🎯 Indications and Usage 8 words ▾

Uses treats head, pubic (crab), and body lice

⏱️ Dosage and Administration ~1 min read ▾

Directions Important: Read warnings before use adults and children 2 years and over: Inspect check each household member with a magnifying glass in bright light for lice/nits (eggs) look for tiny nits near scalp, beginning at back of neck and behind ears examine small sections of hair at a time unlike dandruff which moves when touched, nits stick to the hair if either lice or nits are found, treat with this product Treat apply thoroughly to dry hair or other affected area. For head lice, first apply behind ears and to back of neck. allow product to remain for 10 minutes, but no longer use warm water to form a lather, shampoo, then thoroughly rinse for head lice, towel dry hair and comb out tangles Remove lice and their eggs (nits) use a fine-tooth or special lice/nit comb.

Remove any remaining nits by hand (using a throw-away glove). hair should remain slightly damp while removing nits if hair dries during combing, dampen slightly with water for head lice, part hair into sections. Do one section at a time starting on top of head. Longer hair may take 1 to 2 hours. lift a 1- to 2-inch wide strand of hair.

Place comb as close to scalp as possible and comb with a firm, even motion away from scalp. pin back each strand of hair after combing clean comb often. Wipe nits away with tissue and discard in a plastic bag. Seal bag and discard to prevent lice from coming back. after combing, thoroughly recheck for lice/nits.

Repeat combing if necessary. check daily for any lice/nits that you missed a second treatment must be done in 7 to 10 days to kill any newly hatched lice if infestation continues, see a doctor for other treatments children under 2 years: ask a doctor

⚠️ Warnings 122 words ▾

Warnings For external use only Do not use near eyes inside nose, mouth, or vagina on lice in eyebrows or eyelashes. See a doctor if lice are present in these areas. Ask a doctor before use if you are allergic to ragweed.

May cause breathing difficulty or an asthmatic attack. When using this product keep eyes tightly closed and protect eyes with a washcloth or towel if product gets in eyes, flush with water right away scalp itching or redness may occur Stop use and ask a doctor if breathing difficulty occurs eye irritation occurs skin or scalp irritation continues or infection occurs Keep out of reach of children. If swallowed, get medical help or contact a Poison Control Center right away.

📦 Storage and Handling 32 words ▾

Other information do not freeze store at controlled room temperature, 20 °C to 25 °C (68 °F to 77 °F) Questions or comments call (515) 276-1586 see package insert for additional information

🧪 Active Ingredient 16 words ▾

Active ingredients Purposes Piperonyl butoxide 4% Lice treatment Pyrethrum extract (equivalent to 0.33% pyrethrins) Lice treatment

🧪 Inactive Ingredients 15 words ▾

Inactive ingredients ammonium laureth sulfate, fragrance, PEG-25 hydrogenated castor oil, polyquaternium-10, purified water, SD-40 alcohol

🎯 Purpose 16 words ▾

Active ingredients Purposes Piperonyl butoxide 4% Lice treatment Pyrethrum extract (equivalent to 0.33% pyrethrins) Lice treatment

📄 Do Not Use 26 words ▾

Do not use near eyes inside nose, mouth, or vagina on lice in eyebrows or eyelashes. See a doctor if lice are present in these areas.

📄 Ask a Doctor Before Use If 19 words ▾

Ask a doctor before use if you are allergic to ragweed. May cause breathing difficulty or an asthmatic attack.

📄 When Using This Product 32 words ▾

When using this product keep eyes tightly closed and protect eyes with a washcloth or towel if product gets in eyes, flush with water right away scalp itching or redness may occur

📄 Stop Use and Ask a Doctor If 21 words ▾

Stop use and ask a doctor if breathing difficulty occurs eye irritation occurs skin or scalp irritation continues or infection occurs

📄 Keep Out of Reach of Children 19 words ▾

Keep out of reach of children. If swallowed, get medical help or contact a Poison Control Center right away.

📄 Questions or Comments 12 words ▾

Questions or comments call (515) 276-1586 see package insert for additional information

📄 Package Label / Principal Display Panel 77 words ▾

PRINCIPAL DISPLAY PANEL - 236 mL Bottle Carton MAXIMUM STRENGTH • PROUDLY SERVING FAMILIES FOR • 38 YEARS HERKLIN ® LICE TREATMENT Piperonyl butoxide 4% Pyrethrum extract (0.33% pyrethrins) Kills Lice & Eliminates Nits* Effective & safe for ages 2+ NEED HELP? • Toll Free (844) HERKLIN (437-5546) INCLUDES: Shampoo, Lice & Nit Comb LICE COMB INCLUDED 8 fl oz (236 mL) *Proper use of nit comb removes nits. PRINCIPAL DISPLAY PANEL - 236 mL Bottle Carton

Source: FDA Structured Product Labeling, mirrored from DailyMed / openFDA. Prefer the government’s original formatting? View this label on DailyMed ↗

About this NDC listing & data coverage

Over-the-counter (OTC) product
What data is (and isn’t) available for this NDC — tap to expand
NDC identity (package / product / labeler codes) ✓ Available
Labeler ✓ Available
Product & package description ✓ Available
Marketing category & status ✓ Available
Active ingredient / dosage form / route ✓ Available
FDA label (SPL via DailyMed) ✓ Available
Package photos — Not published for this NDC No photo available yet for this listing.
Inactive ingredients (structured) ✓ Available
NADAC pharmacy acquisition price (CMS) — Not published for this NDC CMS publishes NADAC only for NDCs reported in its retail-pharmacy survey.
Orange Book / therapeutic-equivalence data — Not published for this NDC Applies only to products approved under an NDA/ANDA; many listings are out of scope.
HCPCS J-code billing crosswalk — Not published for this NDC Most self-administered / retail products have no J-code — that is normal.
Medicaid utilization (CMS SDUD) — Not published for this NDC CMS reports utilization only for NDCs with Medicaid claims above its privacy threshold.
“Not published” reflects what the public FDA / CMS / NLM sources provide for this exact package code — it is a property of the data feeds, not a judgment about the product.

Questions about this listing

Is this NDC FDA-approved?
An NDC listing does not by itself establish FDA approval — the NDC Directory records that a product is listed with FDA, not that it was reviewed and approved. This listing's marketing category is "Otc Monograph Final". Products approved under an application carry an NDA, ANDA, or BLA number.
Why is there no price listed?
The pricing shown on our NDC pages comes from CMS NADAC, a voluntary survey of retail community pharmacy invoices. CMS does not publish a NADAC for every NDC — packages outside the retail survey (institutional and hospital products, bulk packages, discontinued items, and many OTC items) may never receive one. A missing price reflects the survey's scope, not this product's actual cost, and does not mean the product is free or unavailable.
Is the NDC printed on the package the same as the 11-digit billing NDC?
Yes, they identify this exact package in different formats. The form printed on the packaging and shown on DailyMed is the one the FDA registered. Insurance claims use a fixed 11-digit 5-4-2 format, so the short segment is padded with a leading zero and the dashes are dropped. The Identity section at the top of this page lists each form of this code.
Is this package still being marketed?
Yes, per the latest FDA NDC Directory data on this page: this package is listed as actively marketed, with no marketing end date reported by MarcusUSA. Listing status can change — the directory data on this page refreshes weekly.
Who lists this product with the FDA?
MarcusUSA is the labeler of record for this NDC — the company under whose FDA-assigned code the package is listed. The labeler may be the manufacturer itself or a distributor marketing the product under its own code.
Do I need a prescription for this product?
This NDC is listed with FDA as an over-the-counter product, so it does not require a prescription. Follow the package directions, and ask your pharmacist if you are unsure whether it is right for you.
This page identifies an FDA-listed package (the NDC) and reports public regulatory and pricing data about the listing. It is reference information, not a medical recommendation — talk to your pharmacist or prescriber about your own medication.
Where does this data come from?
Listing facts (marketing category, packager status, marketing dates) from the FDA openFDA NDC Directory; label availability from DailyMed; pricing coverage from CMS NADAC; equivalence scope from the FDA Orange Book.
← 75936-0669-02 · Supergoop! 75940-0192-09 · MarcasUSA →
For educational and professional reference only — not medical advice. Pricing reflects published NADAC and CMS ASP (free public data) and may differ from your acquisition cost; always verify before billing or dispensing.