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United States· US:50090-7824_99cdaf0a-a8bf-4889-b89d-34dcd8be8031

Allergy Relief

A diphenhydramine product containing diphenhydramine hydrochloride, registered in United States by A-S Medication Solutions. The same ATC class is registered in 12 of our 19 countries.

ATC R06AA02US label

Checked against FDA National Drug Code directory (United States) on

Informational only — not a medical device.

SOURCE REGISTER · USFDA National Drug Code directory (Unite…normalisedAllergy ReliefATCR06AA02REGISTER NO.US:50090-7824_99cdaf0…PACKS LISTED2CHECKEDSeptember 27, 2026
Compare price across countriesPer daily dose · free accountAsk the assistant about diphenhydramine hydrochlorideAnswers with sources · free accountCheck interactionsSeverity free · mechanism on Growth

Where it is registered

Diphenhydramine is registered in 12 of 19 countries.

Countries holding a registration under ATC R06AA02 (diphenhydramine), each read from that country’s own register.

  • This record: United States, from FDA National Drug Code directory (United States)
  • 6 of them publish a price we can compare per daily dose
Search diphenhydramine products by name

Diphenhydramine · ATC R06AA02

12 / 19 countries

  • Belgiumprice
  • Canada
  • Denmark
  • Germany
  • Icelandprice
  • Ireland
  • Japan
  • Norwayprice
  • Polandprice
  • Switzerlandprice
  • 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 HYDROCHLORIDE
Manufacturer
A-S Medication Solutions
Country
United States (US)
ATC code
R06AA02
ATC class
Diphenhydramine
Defined daily dose
0.2 g, O
Reimbursed
Not published by this register
Source register
FDA National Drug Code directory (United States)
Last checked
September 27, 2026

Packs & prices · 2

  • ndc11
    5009078240
    1 BOTTLE, PLASTIC in 1 CARTON (50090-7824-0) / 118 mL in 1 BOTTLE, PLASTIC
  • ndc11
    50090-7824-0

Regulatory notes

No shortage, Orange Book or US label notes for this record.

Interactions

469 interactions on record for diphenhydramine.

Graded by severity as the source publishes them — 14 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 medicinesHow interaction checks work

Diphenhydramine · interactions on record

469 records

  • 14 severe
  • 417 moderate
  • 2 minor

Most severe, free to view

  • Potassium chlorideA12BA01severe
  • Potassium citrateA12BA02severe
  • EliglustatA16AX10severe
  • Potassium chlorideB05XA01severe

36 more interactions with mechanism and management, from a commercially licensed source.

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  • 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/da0b6104-5487-40e1-99fb-a00d2544b16d
GET /v1/drugs/da0b6104-5487-40e1-99fb-a00d2544b16d?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.

{
  "route": "ORAL",
  "source": "ndc",
  "strength": "12.5",
  "substance": "DIPHENHYDRAMINE HYDROCHLORIDE",
  "productndc": "50090-7824",
  "dosage_form": "SOLUTION",
  "dea_schedule": null,
  "strength_unit": "mg/5mL",
  "application_number": "M012",
  "marketing_category": "OTC MONOGRAPH DRUG"
}
API referenceMCP serverPlans

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.

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