United States· US:55910-124_7d90f02c-1066-4512-acc4-850688f837a6

Allergy

A diphenhydramine product containing diphenhydramine hcl, registered in United States by DOLGENCORP, LLC. The same ATC class is registered in 6 of our 19 countries.

ATC D04AA32US label

Checked against FDA National Drug Code directory (United States) on September 12, 2026

Informational only — not a medical device.

Compare price across countriesPer daily dose · free account Ask the assistant about diphenhydramine hclAnswers with sources · free account Check interactionsSeverity free · mechanism on Growth

Where it is registered

Diphenhydramine is registered in 6 of 19 countries.

Countries holding a registration under ATC D04AA32 (diphenhydramine), each read from that country’s own register.

This record: United States, from FDA National Drug Code directory (United States)
4 of them publish a price we can compare per daily dose

Search diphenhydramine products by name

Diphenhydramine · ATC D04AA32

6 / 19 countries

Belgiumprice
Canada
Czechiaprice
Finlandprice
United Kingdom
United Statesprice

Blue: a registration under this ATC code. The ringed marker is this record’s country. Markets marked price publish a price we can compare per daily dose.

The record

At a glance

FDA National Drug Code directory (United States)

Active substance: Diphenhydramine HCl
Manufacturer: DOLGENCORP, LLC
Country: United States (US)
ATC code: D04AA32
ATC class: Diphenhydramine
Reimbursed: Not published by this register
Source register: FDA National Drug Code directory (United States)
Last checked: September 12, 2026

Packs & prices · 1

ndc11
5591012436
1 BOTTLE, PLASTIC in 1 CARTON (55910-124-36) / 118 mL in 1 BOTTLE, PLASTIC

Regulatory notes

UNII (FDA substance ID)

TC2D6JAD40

DIPHENHYDRAMINE HYDROCHLORIDE

RxCUI 1362

DailyMed SPL labels

1 version tracked

Interactions

6 interactions on record for diphenhydramine.

Graded by severity as the source publishes them — 2 severe. Severity grades are free for everyone; mechanism and management come with Growth.

Severity for every pair — free, no plan needed
The source, licence and sync date on every record
Mechanism and what to do for each pair — Growth plan

Check diphenhydramine against other medicines How interaction checks work

Diphenhydramine · interactions on record

6 records

2 severe
4 moderate

Most severe, free to view

Sodium oxybateN01AX11severe
Sodium oxybateN07XX04severe
FlibanserinG02CX02moderate
ApomorphineG04BE07moderate

Interaction severity from DDInter 2.0 (Xiong G. et al., Nucleic Acids Res.), licensed CC BY-NC 4.0 — free for non-commercial use only; not covered by the Drug Database commercial licence.

Mechanism and what to do, in the interaction check

Source: DDInter 2.0 · synced 29 Sept 2026. Grades as the source publishes them.

Same medicine, other countries

Diphenhydramine in 11 other countries

What each register calls a product with the same active substance — salts and hydrates count as the same.

All diphenhydramine products

Authorised across Europe · EMA

The same active substance is authorised in 20 EEA countries. Names it is sold under:

Austria · Calmaben, Dermodrin
Belgium · Nustasium, R Calm
Bulgaria · Дермодрин, Калмабен
Czechia · Psilo-Balsam
Germany · Betadorm-D, Diphenhydramin Hevert
Denmark · Benylan, Coldycof
Spain · Neosayomol, Soñodor
United Kingdom (Northern Ireland) · Almus Max Strength Sleep Aid, Asda Night Time Sleep Aid
Hungary · Supraderm
Ireland · Nytol One-A-Night
Iceland · Benylan
Italy · Allergan
Lithuania · Psilo-Balsam
Luxembourg · Nustasium
Latvia · Pretniezes, Psilo-Balsam
Poland · Luminastil, Nodisen
Portugal · Benaderma, Benergina
Romania · Calmaben, Dermodrin
Sweden · Desentol
Slovakia · Calmaben, Psilo-Balsam

Source: European Medicines Agency, Article 57 product data.

Sourced from a public register and reproduced with attribution. Drug Database is not affiliated with, endorsed by, or a partner of FDA National Drug Code directory (United States). This is an informational data service and not a medical device — verify against the official source of record before any clinical decision.

For developers

The same record over the API, and the raw payload

GET /v1/drugs/30ac3db2-b5a8-455f-9e55-ad8af63b59ad
GET /v1/drugs/30ac3db2-b5a8-455f-9e55-ad8af63b59ad?format=fhir

Every response carries last_synced_at, so freshness is a field rather than a promise. Below is exactly what the ingestion wrote, before any presentation — the same JSON the API returns under payload.

{
  "unii": {
    "unii": "TC2D6JAD40",
    "rxcui": "1362",
    "inchikey": "PCHPORCSPXIHLZ-UHFFFAOYSA-N",
    "display_name": "DIPHENHYDRAMINE HYDROCHLORIDE",
    "substance_type": "chemical",
    "ingredient_type": "INGREDIENT SUBSTANCE"
  },
  "route": "ORAL",
  "livertox": {
    "summary": null,
    "livertox_id": null,
    "hepatotoxicity_score": 5
  },
  "spl_meta": {
    "934c7b91-3cba-47f0-8efa-77216f3f15c4": {
      "match": "brand_token",
      "title": "ALLERGY RELIEF CHILDRENS (DIPHENHYDRAMINE HCL) TABLET, CHEWABLE [AMERISOURCE BERGEN]",
      "spl_version": "14",
      "published_date": "2026-06-01"
    }
  },
  "productid": "55910-124_7d90f02c-1066-4512-acc4-850688f837a6",
  "productndc": "55910-124",
  "dosage_form": "SOLUTION",
  "dea_schedule": null,
  "product_type": "HUMAN OTC DRUG",
  "substance_name": "DIPHENHYDRAMINE HYDROCHLORIDE",
  "proprietary_name": "Allergy",
  "active_ingred_unit": "mg/5mL",
  "application_number": "M012",
  "marketing_category": "OTC MONOGRAPH DRUG",
  "nonproprietary_name": "Diphenhydramine HCl",
  "start_marketing_date": "20240606",
  "active_numerator_strength": "12.5"
}

API reference MCP server Plans

See everything about diphenhydramine.

This page is the registration. A free account adds the label text as the regulator wrote it, what it costs per daily dose across the markets that publish a price, a feed of what changes in the registers, and an assistant that answers with its sources. Interaction severity is free; mechanism and management are on the Growth plan. No card, nothing to install.

Try it free Open in the console