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Record Information
StatusExpected but not Quantified
Creation Date2012-09-06 15:16:52 UTC
Update Date2020-02-26 21:41:58 UTC
Secondary Accession Numbers
  • HMDB15639
Metabolite Identification
Common NameMepyramine
DescriptionMepyramine, also known as pyranisamine or anthisan, belongs to the class of organic compounds known as 2-benzylaminopyridines. These are aromatic compounds containing pyridine ring substituted at the 2-position by a benzylamine group. However, it rapidly permeates the brain and so often causes drowsiness as a side effect. Mepyramine is a very strong basic compound (based on its pKa). In humans, mepyramine is involved in mepyramine h1-antihistamine action. The signs and symptoms that are produced after the acute overdosage of Mepyramine include Convulsions, Coma, Ataxia, Hyperpyrexia, Tremor, Extrapyramidal effects, Excitement. Mepyramine is a histamine H1 receptor inverse agonist. It is a first generation antihistamine. It binds to a G protein-coupled form of the receptor and promotes a G protein-coupled inactive state of the H1 receptor that interferes with the Gq/11-mediated signaling. Mepyramine competes with histamine for binding at H1-receptor sites on the effector cell surface, resulting in suppression of histaminic edema, flare, and pruritus. It has been found in over-the-counter combination products for colds and menstrual symptoms, but is considered to be an unapproved prescription medication used for cough, cold, or allergic conditions. The sedative properties of Mepyramine occur at the subcortical level of the CNS. Mepyramine, or pyrilamine, targets the H1 receptor.
Mepyramine maleateHMDB
Boots brand OF mepyramine maleateHMDB
Pyrilamine maleateHMDB
Boots bite and sting reliefHMDB
Maleate, mepyramineHMDB
Maleate, pyrilamineHMDB
Chemical FormulaC17H23N3O
Average Molecular Weight285.384
Monoisotopic Molecular Weight285.184112373
IUPAC NameN-[2-(dimethylamino)ethyl]-N-[(4-methoxyphenyl)methyl]pyridin-2-amine
Traditional Namemepyramine
CAS Registry Number91-84-9
InChI Identifier
Chemical Taxonomy
Description belongs to the class of organic compounds known as 2-benzylaminopyridines. These are aromatic compounds containing pyridine ring substituted at the 2-position by a benzylamine group.
KingdomOrganic compounds
Super ClassBenzenoids
ClassBenzene and substituted derivatives
Sub ClassBenzylamines
Direct Parent2-benzylaminopyridines
Alternative Parents
  • 2-benzylaminopyridine
  • Phenoxy compound
  • Anisole
  • Methoxybenzene
  • Dialkylarylamine
  • Phenol ether
  • Alkyl aryl ether
  • Aminopyridine
  • Imidolactam
  • Pyridine
  • Heteroaromatic compound
  • Tertiary aliphatic amine
  • Tertiary amine
  • Ether
  • Azacycle
  • Organoheterocyclic compound
  • Organic nitrogen compound
  • Organooxygen compound
  • Organonitrogen compound
  • Hydrocarbon derivative
  • Organopnictogen compound
  • Organic oxygen compound
  • Amine
  • Aromatic heteromonocyclic compound
Molecular FrameworkAromatic heteromonocyclic compounds
External Descriptors

Biological location:


Naturally occurring process:


Industrial application:

Physical Properties
Experimental Properties
Melting PointNot AvailableNot Available
Boiling PointNot AvailableNot Available
Water Solubility0.78 g/LNot Available
LogPNot AvailableNot Available
Predicted Properties
Water Solubility0.78 g/LALOGPS
pKa (Strongest Basic)8.76ChemAxon
Physiological Charge1ChemAxon
Hydrogen Acceptor Count4ChemAxon
Hydrogen Donor Count0ChemAxon
Polar Surface Area28.6 ŲChemAxon
Rotatable Bond Count7ChemAxon
Refractivity87.74 m³·mol⁻¹ChemAxon
Polarizability32.89 ųChemAxon
Number of Rings2ChemAxon
Rule of FiveYesChemAxon
Ghose FilterYesChemAxon
Veber's RuleYesChemAxon
MDDR-like RuleNoChemAxon
Spectrum TypeDescriptionSplash KeyView
Predicted GC-MSPredicted GC-MS Spectrum - GC-MS (Non-derivatized) - 70eV, Positivesplash10-0a4i-9230000000-eda35975a1b57899320dSpectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QFT , positivesplash10-0076-0290000000-f68a382a2e28b5f2b1fbSpectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QFT , positivesplash10-00di-0930000000-a4aabde6bd23d5631e8dSpectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QFT , positivesplash10-00di-0900000000-0461973c5b6a31124ad2Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QFT , positivesplash10-00di-0900000000-5803a397af45d47e559fSpectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QFT , positivesplash10-00di-1900000000-005c71fce551a8ce71a9Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QFT , positivesplash10-00di-2900000000-fbd3ea6b25f6238e4903Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QTOF , positivesplash10-000i-0090000000-7580edc933e367e03bd4Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QTOF , positivesplash10-00di-0920000000-116fdb01e72f6eed832cSpectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QTOF , positivesplash10-00di-0900000000-d384a4904e9cf89d30a8Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QTOF , positivesplash10-00di-1900000000-760bc84c56f7512a6a55Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QTOF , positivesplash10-00fr-7900000000-8873262b3e31b11b3cccSpectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QFT , positivesplash10-00di-1900000000-c9b1c86211e3b0d8e024Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QFT , positivesplash10-00di-5900000000-30296f89ac06c75ba738Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QFT , positivesplash10-0076-0390000000-3af09900aa13a2ca6791Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QFT , positivesplash10-00di-0930000000-b947fc17f6a8ca5aa2c2Spectrum
LC-MS/MSLC-MS/MS Spectrum - LC-ESI-QFT , positivesplash10-00di-0900000000-debdce4be33f8a51cd66Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Positivesplash10-000i-2090000000-b844dce88f074a5c3020Spectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Positivesplash10-00dl-6190000000-b35fea8e7bef8107896aSpectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Positivesplash10-00di-9720000000-7d6671705a8df0e0070cSpectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 10V, Negativesplash10-001i-0090000000-75c8425220c3023e9e7cSpectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 20V, Negativesplash10-01q9-0290000000-626cedd9c3a8dbe6dfbeSpectrum
Predicted LC-MS/MSPredicted LC-MS/MS Spectrum - 40V, Negativesplash10-0002-3920000000-9dd843413cd8a667e02dSpectrum
Biological Properties
Cellular Locations
  • Membrane
Biospecimen Locations
  • Blood
  • Urine
Tissue LocationsNot Available
Normal Concentrations
BloodExpected but not Quantified Not AvailableNot AvailableTaking drug identified by DrugBank entry DB06691 details
UrineExpected but not Quantified Not AvailableNot AvailableTaking drug identified by DrugBank entry DB06691 details
Abnormal Concentrations
Not Available
Associated Disorders and Diseases
Disease ReferencesNone
Associated OMIM IDsNone
DrugBank IDDB06691
Phenol Explorer Compound IDNot Available
FooDB IDNot Available
KNApSAcK IDNot Available
Chemspider ID4818
KEGG Compound IDC11798
BioCyc IDNot Available
BiGG IDNot Available
Wikipedia LinkPyrilamine
METLIN IDNot Available
PubChem Compound4992
PDB IDNot Available
ChEBI ID6762
Food Biomarker OntologyNot Available
VMH IDNot Available
Synthesis ReferenceNot Available
Material Safety Data Sheet (MSDS)Not Available
General ReferencesNot Available


General function:
Involved in monooxygenase activity
Specific function:
Responsible for the metabolism of many drugs and environmental chemicals that it oxidizes. It is involved in the metabolism of drugs such as antiarrhythmics, adrenoceptor antagonists, and tricyclic antidepressants.
Gene Name:
Uniprot ID:
Molecular weight:
  1. Preissner S, Kroll K, Dunkel M, Senger C, Goldsobel G, Kuzman D, Guenther S, Winnenburg R, Schroeder M, Preissner R: SuperCYP: a comprehensive database on Cytochrome P450 enzymes including a tool for analysis of CYP-drug interactions. Nucleic Acids Res. 2010 Jan;38(Database issue):D237-43. doi: 10.1093/nar/gkp970. Epub 2009 Nov 24. [PubMed:19934256 ]
General function:
Involved in G-protein coupled receptor protein signaling pathway
Specific function:
In peripheral tissues, the H1 subclass of histamine receptors mediates the contraction of smooth muscles, increase in capillary permeability due to contraction of terminal venules, and catecholamine release from adrenal medulla, as well as mediating neurotransmission in the central nervous system
Gene Name:
Uniprot ID:
Molecular weight:
  1. Moriyama K, Liu J, Jang Y, Chae YJ, Wang Y, Mitchell J, Grond S, Han X, Xing Y, Xie GX, Pierce Palmer P: Receptor mediation and nociceptin inhibition of bradykinin-induced plasma extravasation in the knee joint of the rat. Inflamm Res. 2009 Dec;58(12):873-80. doi: 10.1007/s00011-009-0058-y. Epub 2009 Jun 21. [PubMed:19544046 ]
  2. Chhabria MT, Patel VT, Rajan KS, Brahmkshatriya PS: Design, synthesis and histamine H1-receptor antagonistic activity of some novel 4-amino-2-(substituted)-5-(substituted) aryl-6-[(substituted aryl) amino] pyrimidines. Arzneimittelforschung. 2009;59(5):243-7. [PubMed:19537525 ]
  3. Mojtahedin A, Tamaddonfard E, Zanboori A: Antinociception induced by central administration of histamine in the formalin test in rats. Indian J Physiol Pharmacol. 2008 Jul-Sep;52(3):249-54. [PubMed:19552055 ]
  4. Parsons ME, Ganellin CR: Histamine and its receptors. Br J Pharmacol. 2006 Jan;147 Suppl 1:S127-35. [PubMed:16402096 ]
  5. Snowman AM, Snyder SH: Cetirizine: actions on neurotransmitter receptors. J Allergy Clin Immunol. 1990 Dec;86(6 Pt 2):1025-8. [PubMed:1979798 ]