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Piperonyl butoxide 40 MG/ML / pyrethrins 3.3 MG/ML Medicated Shampoo [Herklin] — RxCUI 1988409

RxNorm drug concept · Semantic branded drug
RxCUI 1988409 Semantic branded drug · SBD ● Current RxNorm concept 1 FDA product 1 package NDC Snapshot Jul 14, 2026

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Compiled from public NLM RxNorm and FDA (openFDA NDC directory) data sources. Editorial policy

What you’re looking at: the standardized identity of one medicine, as the U.S. drug-data system sees it. Below — every FDA-listed product, package code, price benchmark, and billing code that maps to it.

🗂️ Key Facts

RxCUI1988409
Official namePiperonyl butoxide 40 MG/ML / pyrethrins 3.3 MG/ML Medicated Shampoo [Herklin]
Concept typeSemantic branded drug (SBD)
RxNorm statusCurrent RxNorm concept
Also known asHerklin (piperonyl butoxide 4 % / pyrethrins 0.33 % ) Medicated Shampoo; Herklin 4 % / 0.33 % Medicated Shampoo
FDA products mapped1
Package NDCs mapped1
RxNorm release07/06/2026
Snapshot dataJul 14, 2026

📖 Skip the Codes — Read It in Plain English.

Our pharmacist-built guide to Pyrethrin and Piperonyl Butoxide Topical: what it is, how it’s used, side effects, and interactions.

📗 Our plain-language guide HelloPharmacist
  • It treats lice — specifically head lice, pubic (sometimes called crab) lice, and body lice. You apply it directly to the affected area of skin or hair, not take it by mouth. It's n...
  • You leave it on for exactly 10 minutes — no longer — then wash it off with warm water and soap or shampoo. And yes, the second treatment 7 to 10 days later is really important. It...
  • How long do I leave it on, and do I really need a second treatment?
  • Combing is a key part of the treatment. After rinsing, towel-dry your hair and use a fine-tooth lice comb while the hair is still slightly damp. Work through sections starting at t...
📖 Read our full Pyrethrin and Piperonyl Butoxide Topical guide →

🕸️ Concept Web — How Piperonyl butoxide 40 MG/ML / pyrethrins 3.3 MG/... Connects

One RxCUI never lives alone. Follow the path from the raw ingredient down to the exact strength-and-form concepts FDA products carry — every stop is a real RxNorm concept with its own identifier. Hover or focus any chip for what it means.
This page's concept Piperonyl butoxide 40 MG/ML / pyrethrins 3.3 MG/ML Medicated Shampoo [Herklin] RxCUI 1988409

Every web starts here: one RxCUI, one fixed meaning in the RxNorm vocabulary.

  1. Ingredients 3

    The active substance itself — no strength, form, or brand attached yet.

    • Piperonyl butoxide 8345
    • Pyrethrins 8991
    • Piperonyl butoxide / pyrethrins 91299
  2. Brand names 1

    The same medicine's trade names. A brand name alone says nothing about strength or form.

    • Herklin 1988405
  3. Dose forms 6

    The ingredient poured into a form — tablet, solution, cream — still without one fixed strength.

    • Piperonyl butoxide / pyrethrins Medicated Shampoo 377511
    • Piperonyl butoxide / pyrethrins Shampoo Product 1295306
    • Piperonyl butoxide / pyrethrins Medicated Shampoo [Herklin] 1988407
    • Herklin Shampoo Product 1988408
    • Medicated Shampoo 106332
    • Shampoo Product 1294715
  4. Clinical & branded drugs 4

    Ingredient + strength + dose form. These are the concepts real FDA products actually carry.

  5. Packs 1

    Fixed collections of drugs packaged and sold together, like dose packs.

    • {1 (60 ML) (benzalkonium chloride 1 MG/ML Topical Solution) / 1 (60 ML) (piperonyl butoxide 40 MG/ML / pyrethrins 3.3 MG/ML Medicated Shampoo) } Pack 1049756

Showing up to 8 concepts per family — 15 of 15 stored related concepts drawn.
These are official RxNorm vocabulary relationships — how concepts name and organize the same medicine. They do not establish therapeutic equivalence or substitutability: two concepts appearing in one web is never a statement that products can be swapped.

🔀 Generic ⇄ Brand Crosswalk

The same medicine has an unbranded (generic) identity and one or more brand-name identities — each with its own RxCUI. This is a naming relationship in RxNorm, not a statement that any two products are substitutable.

Generic (Clinical) Concepts

  • Piperonyl butoxide 40 MG/ML / pyrethrins 3.3 MG/ML Medicated Shampoo SCD · 283219
  • Piperonyl butoxide 40 MG/ML SCDC · 330135
  • Pyrethrins 3.3 MG/ML SCDC · 333696
  • Piperonyl butoxide / pyrethrins Medicated Shampoo SCDF · 377511
  • Piperonyl butoxide / pyrethrins Shampoo Product SCDG · 1295306
  • {1 (60 ML) (benzalkonium chloride 1 MG/ML Topical Solution) / 1 (60 ML) (piperonyl butoxide 40 MG/ML / pyrethrins 3.3 MG/ML Medicated Shampoo) } Pack GPCK · 1049756

Brand-Name Concepts

  • Piperonyl butoxide 40 MG/ML / pyrethrins 3.3 MG/ML [Herklin] SBDC · 1988406
  • Piperonyl butoxide / pyrethrins Medicated Shampoo [Herklin] SBDF · 1988407
  • Herklin Shampoo Product SBDG · 1988408
  • Herklin BN · 1988405

📦 FDA Products & Package NDCs

1 product · 1 package NDC
1 package NDC map to RxCUI 1988409 in the current snapshot — up to 50 per page. Each linked NDC opens its full package page.
Package NDC Package Brand / generic name Labeler Marketing start
75940-0192-09 59 mL in 1 BOTTLE (75940-192-09) Herklin Lice Treatment MarcasUSA LLC 2018-07-16
Observed labelers: MarcasUSA LLC (1) — this is the FDA-listed mapping footprint, not sales, inventory, availability, or market share.

🗃️ Sources & Limits

Atlas generation902fddb9-e9c1-4004-bf4c-dba4d51037c7
openFDA export observedJul 14, 2026
RxNorm release07/06/2026
Methodology2026-07-full-catalog-v1
  • A shared RxCUI does not prove interchangeability. Products mapped to the same concept are not thereby equivalent or substitutable — equivalence is a separate, product-level determination.
  • Listing here does not establish approval or coverage. Appearing in this snapshot is a data observation, not an FDA approval status or a payer coverage decision.
  • Missing data never means zero. A silent dataset (no price, no billing code, no utilization) means no observation — not that the real-world value is zero.
  • Counts describe the mapping footprint. Product, package, and labeler counts are the FDA-listed mapping footprint in this snapshot — not sales, inventory, availability, or market share.
This product uses publicly available data from the U.S. National Library of Medicine (NLM), National Institutes of Health, Department of Health and Human Services; NLM is not responsible for the product and does not endorse or recommend this or any other product.

Machine-readable JSON

Reference information about drug-concept identifiers and public regulatory data — not medical advice. Talk to your pharmacist or prescriber about your own medication.