KEGG   DRUG: Diphenhydramine hydrochloride
Entry
D00669                      Drug                                   
Name
Diphenhydramine hydrochloride (JP18/USP);
Benadryl (TN)
Product
  Generic
Formula
C17H21NO. HCl
Exact mass
291.139
Mol weight
291.8157
Structure
Simcomp
Class
Anti-allergic agent
 DG01557  Histamine receptor antagonist
  DG01482  Histamine receptor H1 antagonist
Remark
Same as: C07784
Therapeutic category: 4411
ATC code: D04AA32 R06AA02
Chemical structure group: DG00390
Product (DG00390): D00300<JP> D00669<JP/US> D00520<JP/US>
Product (mixture): D04259<JP> D04806<JP> D08769<JP>
Efficacy
Antiallergic, H1 receptor antagonist
  Disease
Parkinsonism [DS:H01600]
Nighttime sleep-aid [DS:H01609]
Comment
Diphenhydramine derivative
Target
HRH1 [HSA:3269] [KO:K04149]
  Pathway
hsa04020  Calcium signaling pathway
hsa04080  Neuroactive ligand-receptor interaction
Interaction
Structure map
map07028  Antipsychotics
map07032  Hypnotics
map07212  Histamine H1 receptor antagonists
Brite
Anatomical Therapeutic Chemical (ATC) classification [BR:br08303]
 D DERMATOLOGICALS
  D04 ANTIPRURITICS, INCL. ANTIHISTAMINES, ANESTHETICS, ETC.
   D04A ANTIPRURITICS, INCL. ANTIHISTAMINES, ANESTHETICS, ETC.
    D04AA Antihistamines for topical use
     D04AA32 Diphenhydramine
      D00669  Diphenhydramine hydrochloride (JP18/USP) <JP/US>
 R RESPIRATORY SYSTEM
  R06 ANTIHISTAMINES FOR SYSTEMIC USE
   R06A ANTIHISTAMINES FOR SYSTEMIC USE
    R06AA Aminoalkyl ethers
     R06AA02 Diphenhydramine
      D00669  Diphenhydramine hydrochloride (JP18/USP) <JP/US>
USP drug classification [BR:br08302]
 Antiemetics
  Antiemetics, Other
   Diphenhydramine
    D00669  Diphenhydramine hydrochloride (JP18/USP)
 Antiparkinson Agents
  Anticholinergics
   Diphenhydramine
    D00669  Diphenhydramine hydrochloride (JP18/USP)
 Respiratory Tract/Pulmonary Agents
  Antihistamines
   Histamine (H1) Receptor Antagonists, Sedating
    Diphenhydramine
     D00669  Diphenhydramine hydrochloride (JP18/USP)
Therapeutic category of drugs in Japan [BR:br08301]
 4  Agents affecting cellular function
  44  Allergic agents
   441  Antihistamines
    4411  Diphenhydramines
     D00669  Diphenhydramine hydrochloride (JP18/USP)
Classification of Japanese OTC drugs [BR:br08313]
 Agents for nervous and sensory systems
  01 Cold remedy (oral use)
   D00669  Diphenhydramine hydrochloride (JP18/USP)
  04 Sedative hypnotic agents
   D00669  Diphenhydramine hydrochloride (JP18/USP)
  06 Antivertigo drugs (incl. motion/morning sickness remedies)
   D00669  Diphenhydramine hydrochloride (JP18/USP)
 Allergic agents
  52 Antihistamine based drugs
   D00669  Diphenhydramine hydrochloride (JP18/USP)
 Agents for integumentary system
  57 Analgesic, antipruritic, astringent, and anti-inflammatory remedies (incl. gel patches)
   D00669  Diphenhydramine hydrochloride (JP18/USP)
 Agents for ophthalmologic use
  64 Allergy eye drops
   D00669  Diphenhydramine hydrochloride (JP18/USP)
Risk category of Japanese OTC drugs [BR:br08312]
 Designated second-class OTC drugs
  Inorganic and organic chemicals
   Diphenhydramine
    D00669  Diphenhydramine hydrochloride (JP18/USP)
 Second-class OTC drugs
  Inorganic and organic chemicals
   Diphenhydramine
    D00669  Diphenhydramine hydrochloride (JP18/USP)
 Third-class OTC drugs
  Inorganic and organic chemicals
   Diphenhydramine
    D00669  Diphenhydramine hydrochloride (JP18/USP)
Drug groups [BR:br08330]
 Anti-allergic agent
  DG01557  Histamine receptor antagonist
   DG01482  Histamine receptor H1 antagonist
    DG00390  Diphenhydramine
     D00669  Diphenhydramine hydrochloride
Drug classes [BR:br08332]
 Anti-allergic agent
  DG01482  Histamine receptor H1 antagonist
   D00669  Diphenhydramine hydrochloride
Target-based classification of drugs [BR:br08310]
 G Protein-coupled receptors
  Rhodopsin family
   Histamine
    HRH1
     D00669  Diphenhydramine hydrochloride (JP18/USP) <JP/US>
Drugs listed in the Japanese Pharmacopoeia [BR:br08311]
 Chemicals
  D00669  Diphenhydramine hydrochloride
Rx-to-OTC switch list in the USA [br08315.html]
 D00669
Drug groups [BR:br08330]
 Anti-allergic agent
  DG01557  Histamine receptor antagonist
   DG01482  Histamine receptor H1 antagonist
    DG00390  Diphenhydramine
Other DBs
CAS: 147-24-0
PubChem: 7847735
ChEBI: 4637
LigandBox: D00669
NIKKAJI: J237.227D
KCF data

ATOM        20
            1   X   Cl   34.6500  -16.2400
            2   C1c C    28.0247  -15.1856
            3   C8y C    26.8139  -15.8899
            4   C8y C    29.2415  -15.8899
            5   O2a O    28.0306  -13.7884
            6   C8x C    26.8139  -17.2930
            7   C8x C    25.6030  -15.1856
            8   C8x C    29.2358  -17.2930
            9   C8x C    30.4465  -15.1856
            10  C1b C    29.2415  -13.0840
            11  C8x C    25.6030  -17.9856
            12  C8x C    24.3862  -15.8899
            13  C8x C    30.4465  -17.9856
            14  C8x C    31.6632  -15.8899
            15  C8x C    24.3862  -17.2930
            16  C8x C    31.6573  -17.2930
            17  C1b C    30.4774  -13.7950
            18  N1c N    31.6739  -13.1016
            19  C1a C    32.8632  -13.7857
            20  C1a C    31.6717  -11.6927
BOND        20
            1     6  11 2
            2     7  12 1
            3     8  13 1
            4     9  14 2
            5    11  15 1
            6    13  16 2
            7    12  15 2
            8    14  16 1
            9     2   3 1
            10    2   4 1
            11    2   5 1
            12    3   6 1
            13    3   7 2
            14    4   8 2
            15    4   9 1
            16    5  10 1
            17   10  17 1
            18   17  18 1
            19   18  19 1
            20   18  20 1

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