United States· US:37000-501_4cd691b5-9a5d-eacf-e063-6394a90ad540
ZzzQuil
A diphenhydramine product containing diphenhydramine hydrochloride, registered in United States by The Procter & Gamble Manufacturing Company. The same ATC class is registered in 12 of our 19 countries.
Checked against FDA National Drug Code directory (United States) on
Informational only — not a medical device.
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
Diphenhydramine · ATC R06AA02
12 / 19 countries
- Belgiumprice
- Canada
- Denmark
- Germany
- Icelandprice
- Ireland
- Japan
- Norwayprice
- Polandprice
- Switzerlandprice
- United Kingdom
- United Statesprice
The record
At a glance
FDA National Drug Code directory (United States)- Active substance
- DIPHENHYDRAMINE HYDROCHLORIDE
- Manufacturer
- The Procter & Gamble Manufacturing Company
- 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 · 14
- ndc1137000-501-72
- ndc1137000-501-96
- ndc1137000501022 CAPSULE, GELATIN COATED in 1 BLISTER PACK (37000-501-02)
- ndc1137000501088 BLISTER PACK in 1 CARTON (37000-501-08) / 2 CAPSULE, GELATIN COATED in 1 BLISTER PACK
- ndc1137000501126 BLISTER PACK in 1 CARTON (37000-501-12) / 2 CAPSULE, GELATIN COATED in 1 BLISTER PACK
- ndc11370005012412 BLISTER PACK in 1 CARTON (37000-501-24) / 2 CAPSULE, GELATIN COATED in 1 BLISTER PACK
- ndc11370005014824 BLISTER PACK in 1 CARTON (37000-501-48) / 2 CAPSULE, GELATIN COATED in 1 BLISTER PACK
- ndc11370005017236 BLISTER PACK in 1 CARTON (37000-501-72) / 2 CAPSULE, GELATIN COATED in 1 BLISTER PACK
- ndc1137000501962 CARTON in 1 CELLO PACK (37000-501-96) / 24 BLISTER PACK in 1 CARTON / 2 CAPSULE, GELATIN COATED in 1 BLISTER PACK
- ndc1137000-501-02
- ndc1137000-501-08
- ndc1137000-501-12
- ndc1137000-501-24
- ndc1137000-501-48
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
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.
Sign in to check- 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.
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.
- CanadaALLERGY FORMULAVITA HEALTH PRODUCTS INC
- United KingdomAdult Meltus Night Time syrupSSL International Plc
- GermanyBetadorm-DRecordati Pharma Gmbh
- BelgiumAzaron 20 mg/g LotionPerrigo Belgium
- NorwayDiphenhydramine eonEon Labs
- SwitzerlandBenocten, TablettenMedinova AG
- PolandLuminastilAflofarm Farmacja Polska Sp. z o.o.
- SpainDIFENHIDRAMINA OMEGA PHARMA 50 MG COMPRIMIDOSOmega Pharma España, S.A.
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/e691d4e9-1e79-4596-a1f4-2954dc311889 GET /v1/drugs/e691d4e9-1e79-4596-a1f4-2954dc311889?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": "25",
"substance": "DIPHENHYDRAMINE HYDROCHLORIDE",
"productndc": "37000-501",
"dosage_form": "CAPSULE, GELATIN COATED",
"dea_schedule": null,
"strength_unit": "mg/1",
"application_number": "M010",
"marketing_category": "OTC MONOGRAPH DRUG"
}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.