HISTERGAN

This brand name is authorized in Cyprus, Hong Kong SAR China, UK.

Active ingredients

The drug HISTERGAN contains one active pharmaceutical ingredient (API):

1	Diphenhydramine UNII 8GTS82S83M - 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.
	Read more about Diphenhydramine

Medication package inserts

Below package inserts are available for further reading:

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

Medicine classification

This drug has been classified in the anatomical therapeutic chemical (ATC) classification system as follows:

ATC Group		Classification
D04AA32	Diphenhydramine	D Dermatologicals → D04 Antipruritics, incl. antihistamines, anesthetics, etc. → D04A Antipruritics, incl. antihistamines, anesthetics, etc. → D04AA Antihistamines for topical use
Discover more medicines within D04AA32

Authorization and marketing

This drug has been assigned below unique identifiers within the countries it is being marketed:

Country	Identification scheme	Identifier(s)
GB	Medicines & Healthcare Products Regulatory Agency	45759, 89637, 89736
HK	Department of Health Drug Office	30574