ATC Group: D04AA32 Diphenhydramine

The World Health Organization's ATC classification organizes medical drugs based on therapeutic properties, chemical composition, and anatomy. It helps make essential medicines readily available globally and is widely used in the pharmaceutical industry.

Position of D04AA32 in the ATC hierarchy

Level Code Title
1 D Dermatologicals
2 D04 Antipruritics, incl. antihistamines, anesthetics, etc.
3 D04A Antipruritics, incl. antihistamines, anesthetics, etc.
4 D04AA Antihistamines for topical use
5 D04AA32 Diphenhydramine

Active ingredients in D04AA32

Active Ingredient Description
Diphenhydramine

Diphenhydramine is an ethanolamine-derivative antihistamine. It is an antihistamine with anticholinergic and marked sedative effects. It acts by inhibiting the effects on H1-receptors. Diphenhydramine is effective in reducing sleep onset (i.e., time to fall asleep) and increasing the depth and quality of sleep.

Related product monographs

Title Information Source Document Type  
HISTERGAN Coated tablet Medicines & Healthcare Products Regulatory Agency (GB) MPI, EU: SmPC
HISTERGAN Topical cream Medicines & Healthcare Products Regulatory Agency (GB) MPI, EU: SmPC

Medicines in this ATC group

Austria (AT)

Canada (CA)

Cyprus (CY)

Hong Kong (HK)

Japan (JP)

Lithuania (LT)

Romania (RO)

Spain (ES)

Turkey (TR)

United Kingdom (UK)

Note the following: The list of brand names is continuously updated, and thus does not include the total of products circulating worldwide.