Mepyramine

Mepyramine
Systematic (IUPAC) name

N-(4-methoxybenzyl)-N',N'-dimethyl-N-pyridin-2-ylethane-1,2-diamine
Clinical data
AHFS/Drugs.com
MedlinePlus
Legal status	?
Identifiers
CAS number	^Y 59-33-6 (maleate)
ATC code	R06 D04
PubChem
IUPHAR ligand
DrugBank
ChemSpider	^Y
UNII	^Y
KEGG	^Y
ChEBI	^N
ChEMBL	^Y
Synonyms	N-[2-(dimethylamino)ethyl]-N-[(4-methoxyphenyl)methyl]pyridin-2-amine
Chemical data
Formula	C₁₇H₂₃N₃O
Mol. mass	285.38 g/mol
SMILES O(c1ccc(cc1)CN(c2ncccc2)CCN(C)C)C
InChI InChI=1S/C17H23N3O/c1-19(2)12-13-20(17-6-4-5-11-18-17)14-15-7-9-16(21-3)10-8-15/h4-11H,12-14H2,1-3H3^Y Key:YECBIJXISLIIDS-UHFFFAOYSA-N^Y
N

Mepyramine, also known as pyrilamine, is a first generation antihistamine, targeting the H₁ receptor.^[1] However, it rapidly permeates the brain often causing drowsiness. It also has anticholinergic properties. It is used in over-the-counter combination products to treat the common cold and menstrual symptoms.^[2] It is also the active ingredient of the topical antihistamine creams Anthisan and Neoantergan, sold for the treatment of insect bites, stings, and nettle rash.

Synthesis

Pyrilamine synthesis:^[3]^[4]^[5]

References

^ Parsons, Mike E.; Ganellin, C. Robin (January 2006). "Histamine and its receptors". British Journal of Pharmacology 147 (S1): S127–S135.
^ Active Ingredients for Midol Complete
^ R.J. Horclois, U.S. Patent 2,502,151 (1950).
^ Huttrer, C. P.; Djerassi, C.; Beears, W. L.; Mayer, R. L.; Scholz, C. R. (1946). "Heterocyclic amines with antithistaminic activity". Journal of the American Chemical Society 68 (10): 1999–2002.
^ D. Bovet, R. Horclois, F. Walthert, C.R. Soc. Biol., 138, 99 (1944).

Antipruritics (D04)

Antihistamines for topical use

Anesthetics for topical use

: INT, SF, LCT

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Antihistamines (R06)

Aminoalkyl ethers	Bromazine (bromodiphenhydramine) Carbinoxamine Clemastine Chlorphenoxamine Diphenylpyraline Diphenhydramine Doxylamine Orphenadrine Phenyltoloxamine

Substituted alkylamines	Brompheniramine Chlorphenamine Dexbrompheniramine (+pseudoephedrine) Dexchlorpheniramine (+betamethasone) Dimetindene Pheniramine Talastine

Substituted ethylenediamines	Chloropyramine Histapyrrodine Mepyramine Methapyrilene Tripelennamine (pyribenzamine)

Phenothiazine derivatives	Alimemazine Hydroxyethylpromethazine Isothipendyl Mequitazine Methdilazine Oxomemazine Promethazine

Piperazine derivatives	Buclizine Cetirizine Chlorcyclizine Cinnarizine Cyclizine Hydroxyzine Levocetirizine Meclizine Niaprazine Oxatomide

Others for systemic use	Antazoline Azatadine Bamipine Cyproheptadine Deptropine Ebastine Emedastine Epinastine Ketotifen Latrepirdine Mebhydrolin Mizolastine Olopatadine Phenindamine Pimethixene Pyrrobutamine Quifenadine Rupatadine Triprolidine selective (Acrivastine Astemizole Azelastine Bilastine Desloratadine Fexofenadine Loratadine Terfenadine)

For topical use	Bamipine Chloropyramine Chlorphenoxamine Clemastine Dimetindene Diphenhydramine Isothipendyl Mepyramine Promethazine Thenalidine

Cholinergics

Receptor ligands

mACh	Agonists: 77-LH-28-1 AC-42 AC-260,584 Aceclidine Acetylcholine AF30 AF150(S) AF267B AFDX-384 Alvameline AQRA-741 Arecoline Bethanechol Butyrylcholine Carbachol CDD-0034 CDD-0078 CDD-0097 CDD-0098 CDD-0102 Cevimeline Choline cis-Dioxolane Ethoxysebacylcholine Itameline LY-593,039 L-689,660 LY-2,033,298 McNA343 Methacholine Milameline Muscarine NGX-267 Ocvimeline Oxotremorine PD-151,832 Pilocarpine RS86 Sabcomeline SDZ 210-086 Sebacylcholine Suberyldicholine Talsaclidine Tazomeline Thiopilocarpine Vedaclidine VU-0029767 VU-0090157 VU-0152099 VU-0152100 VU-0238429 WAY-132,983 Xanomeline YM-796 Antagonists: 3-Quinuclidinyl benzilate 4-DAMP Aclidinium bromide Anisodamine Anisodine Atropine Atropine methonitrate Benactyzine Benzatropine (benztropine) Benzydamine BIBN 99 Biperiden Bornaprine CAR-226,086 CAR-301,060 CAR-302,196 CAR-302,282 CAR-302,368 CAR-302,537 CAR-302,668 CS-27349 Cyclobenzaprine Cyclopentolate Darifenacin DAU-5884 Dimethindene Dexetimide DIBD Dicyclomine (dicycloverine) Ditran EA-3167 EA-3443 EA-3580 EA-3834 Etanautine Etybenzatropine (ethybenztropine) Flavoxate Himbacine HL-031,120 Ipratropium bromide J-104,129 Hyoscyamine Mamba toxin 3 Mamba toxin 7 Mazaticol Mebeverine Methoctramine Metixene N-Ethyl-3-piperidyl benzilate N-Methyl-3-piperidyl benzilate Orphenadrine Otenzepad Oxybutynin PBID PD-102,807 PD-0298029 Phenglutarimide Phenyltoloxamine Pirenzepine Piroheptine Procyclidine Profenamine RU-47,213 SCH-57,790 SCH-72,788 SCH-217,443 Scopolamine (hyoscine) Solifenacin Telenzepine Tiotropium bromide Tolterodine Trihexyphenidyl Tripitamine Tropatepine Tropicamide WIN-2299 Xanomeline Zamifenacin; Others: 1st generation antihistamines (e.g., brompheniramine chlorphenamine cyproheptadine dimenhydrinate diphenhydramine doxylamine mepyramine (pyrilamine) phenindamine pheniramine tripelennamine triprolidine) Tricyclic antidepressants (e.g., imipramine, amitriptyline) Tetracyclic antidepressants (e.g., amoxapine, maprotiline) Typical antipsychotics (e.g., chlorpromazine, thioridazine) Atypical antipsychotics (e.g., clozapine, olanzapine)

nACh	Agonists: 5-HIAA A-84,543 A-366,833 A-582,941 A-867,744 ABT-202 ABT-418 ABT-560 ABT-894 Acetylcholine Altinicline Anabasine Anatoxin-a AR-R17779 Butinoline Butyrylcholine Carbachol Choline Cotinine Cytisine Decamethonium Desformylflustrabromine Dianicline Dimethylphenylpiperazinium Epibatidine Epiboxidine Ethanol Ethoxysebacylcholine EVP-4473 EVP-6124 Galantamine GTS-21 Ispronicline Levamisole Lobeline MEM-63,908 (RG-3487) Morantel Nicotine (tobacco) NS-1738 PHA-543,613 PHA-709,829 PNU-120,596 PNU-282,987 Pozanicline Rivanicline RJR-2429 Sazetidine A Sebacylcholine SIB-1508Y SIB-1553A SSR-180,711 Suberyldicholine Suxamethonium (succinylcholine) TC-1698 TC-1734 TC-1827 TC-2216 TC-5214 TC-5619 TC-6683 Tebanicline Tropisetron UB-165 Varenicline WAY-317,538 XY-4083 Antagonists: 18-MAC 18-MC α-Bungarotoxin α-Conotoxin Alcuronium Allopregnanolone Amantadine Anatruxonium Atracurium Bupropion Chandonium Chlorisondamine Cisatracurium Coclaurine Coronaridine Cyclopropane Dacuronium Decamethonium Desflurane Dextromethorphan Dextropropoxyphene Dextrorphan Diadonium DHβE Dihydrochandonium Dimethyltubocurarine (metocurine) Dipyrandium Dizocilpine (MK-801) Doxacurium Enflurane Esketamine Fazadinium Gallamine Halothane Hexafluronium Hexamethonium (benzohexonium) Hydroxybupropion Ibogaine Isoflurane Ketamine Kynurenic acid Laudexium (laudolissin) Levacetylmethadol Levomethadone Malouetine ME-18-MC Mecamylamine Memantine Methadone Methorphan (racemethorphan) Methyllycaconitine Metocurine Mivacurium Morphanol (racemorphan) Neramexane Nitrous oxide Pancuronium bromide Pempidine Pentamine Pentolinium Phencyclidine Pipecuronium Progesterone Promegestone Radafaxine Rapacuronium Rocuronium Sevoflurane Surugatoxin Thiocolchicoside Toxiferine Tramadol Trimetaphan camsilate (trimethaphan camsylate) Tropeinium Tubocurarine Vanoxerine Vecuronium Xenon

Reuptake inhibitors

CHT	Hemicholinium-3 (hemicholine) Triethylcholine

VAChT	Vesamicol

Enzyme inhibitors

ChAT	1-(-Benzoylethyl)pyridinium 2-(α-Naphthoyl)ethyltrimethylammonium 3-Chloro-4-stillbazole 4-(1-Naphthylvinyl)pyridine Acetylseco hemicholinium-3 Acryloylcholine AF64A B115 BETA CM-54,903 N,N-Dimethylaminoethylacrylate N,N-Dimethylaminoethylchloroacetate

AChE	Reversible: Carbamates: Aldicarb Bendiocarb Bufencarb Carbaryl Carbendazim Carbetamide Carbofuran Chlorbufam Chloropropham Ethienocarb Ethiofencarb Fenobucarb Fenoxycarb Formetanate Furadan Ladostigil Methiocarb Methomyl Miotine Oxamyl Phenmedipham Pinmicarb Pirimicarb Propamocarb Propham Propoxur; Stigmines: Distigmine bromide Eptastigmine Ganstigmine Neostigmine Phenserine Physostigmine Pyridostigmine bromide Quilostigmine Rivastigmine Terestigmine; Others: Acotiamide Ambenonium Donepezil Caffeine Edrophonium Galantamine Huperzine A Ipidacrine Minaprine Tacrine Zanapezil Irreversible: Organophosphates: Acephate Azinphos-methyl Bensulide Cadusafos Chlorethoxyfos Chlorfenvinphos Chlorpyrifos Chlorpyrifos-methyl Coumaphos Cyclosarin Demeton Demeton-S-methyl Diazinon Dichlorvos Dicrotophos Diisopropyl fluorophosphate Diisopropylphosphate Dimethoate Dioxathion Disulfoton EA-3148 Echothiophate Ethion Ethoprop Fenamiphos Fenitrothion Fenthion Fosthiazate GV Isofluorophate Isoxathion Malaoxon Malathion Methamidophos Methidathion Metrifonate Mevinphos Monocrotophos Naled Novichok agent Omethoate Oxydemeton-methyl Paraoxon Parathion Parathion-methyl Phorate Phosalone Phosmet Phoxim Pirimiphos-methyl Sarin Soman Tabun Tebupirimfos Temefos Terbufos Tetrachlorvinphos Tribufos Trichlorfon VE VG VM VR VX; Others: Demecarium Onchidal (Onchidella binneyi)

BChE	Cymserine Note: Many of the AChE inhibitors listed above also act as BChE inhibitors.

Others

Precursors	Choline (lecithin) Citicoline Cyprodenate Dimethylethanolamine Glycerophosphocholine Meclofenoxate (centrophenoxine) Phosphatidylcholine Phosphatidylethanolamine Phosphorylcholine Pirisudanol

Cofactors	Acetic acid Acetylcarnitine Acetyl-coA Vitamin B₅

Others	Acetylcholine releasing agents: α-Latrotoxin β-Bungarotoxin; Acetylcholine release inhibitors: Botulinum toxin (Botox); Acetylcholinesterase reactivators: Asoxime Obidoxime Pralidoxime

Hallucinogens

Psychedelics
5-HT_2AR agonists

Lysergamides	AL-LAD ALD-52 BU-LAD IP-LAD Diallyllysergamide Dimethyllysergamide Ergometrine ETH-LAD LAE-32 LPD-824 LSA LSD LSD-Pip LSH LSM-775 Lysergic acid 2-butyl amide LSZ Lysergic acid 3-pentyl amide Methylergometrine Methylisopropyllysergamide Methysergide N1-Methyl-lysergic acid diethylamide PARGY-LAD PRO-LAD

Phenethylamines	Aleph 2-(2,5-Dimethoxy-4-bromobenzyl)-6-(2-methoxyphenyl)piperidine 2-Methyl-MDA 2C-B 2C-B-Dragonfly 2C-B-FLY 2CB-Ind βk-2C-B 2C-C 2C-C-FLY 25C-NBOMe 25CN-NBOH 25CN-NBOMe 25D-NBOMe 2C-D 2C-D-FLY 2C-E 2C-E-FLY 25E-NBOMe 2C-EF 2C-F 25F-NBOMe 2C-G 25G-NBOMe 25H-NBOMe 2C-I 2C-IP 2C-I-FLY 2C-N 25N-NBOMe 2C-O 2C-O-4 2C-P 2C-T 2C-T-2 2C-T-4 25T4-NBOMe 2C-T-7 2C-T-7-FLY 25T7-NBOH 2C-T-8 2C-T-13 2C-T-15 2C-T-17 2C-T-19 2C-T-21 2C-TFM 25TFM-NBOMe 2C-YN 2C-V 2CBCB-NBOMe 2CBFly-NBOMe 2CD-5EtO 25B-NBOMe 25B-NBOH 25C-NBOH 25I-NBMD 25I-NBOH 25I-NBF 25I-NBOMe 25P-NBOMe 3C-AL 3C-E 3C-P 5-APB 5-APDB 5-APDI 5-Methyl-MDA 6-APB 6-APDB 6-Methyl-MDA Br-DFLY DESOXY DMMDA DMMDA-2 DOB DOB-FLY DOC DOEF DOET DOF DOI DOM DOM-FLY DON DOPR DOTFM BOB BOD Escaline Ganesha HOT-2 HOT-7 HOT-17 Isoproscaline Jimscaline Lophophine Macromerine MDA MDEA MDMA Mescaline Methallylescaline MMA MMDA MMDA-2 MMDA-3a MMDMA NBOMe-mescaline Proscaline TCB-2 TFMFly TMA

Piperazines	pFPP TMFPP mCPP

Tryptamines	1-Methyl-5-methoxy-diisopropyltryptamine 2,N,N-TMT 4,5-DHP-AMT 4,5-DHP-DMT 4-Acetoxy-DALT 4-Acetoxy-DET 4-Acetoxy-DiPT 4-Acetoxy-DMT 4-Acetoxy-DPT 4-Acetoxy-MiPT 4-HO-5-MeO-DMT 4-HO-DBT 4-HO-DPT 4-HO-MET 4-HO-MPMI 4-HO-MPT 4,N,N-TMT 4-Propionyloxy-DMT 5,6-diBr-DMT 5-AcO-DMT 5-Bromo-DMT 5-Me-MIPT 5-MeO-2,N,N-TMT 5-MeO-4,N,N-TMT 5-MeO-α,N,N-TMT 5-MeO-α-ET 5-MeO-α-MT 5-MeO-DALT 5-MeO-DET 5-MeO-DiPT 5-MeO-DMT 5-MeO-DPT 5-MeO-EiPT 5-MeO-MET 5-MeO-MiPT 5-MeO-MPMI 5-N,N-TMT 7,N,N-TMT α-ET α-MT α,N,N-TMT Aeruginascin Baeocystin Bufotenin DALT DBT DCPT DET DIPT DMT DPT EiPT Ethocin Ethocybin Ibogaine Iprocin MET Miprocin MiPT Norbaeocystin Noribogaine PiPT Psilocin Psilocybin Voacangine

Others	AL-38022A ALPHA Dimemebfe Efavirenz Elemicin M-ALPHA Myristicin RH-34

Dissociatives
NMDAR antagonists

Adamantanes	Amantadine Memantine Rimantadine

Arylcyclohexylamines	3-MeO-PCP 4-MeO-PCP Dieticyclidine Diphenidine Esketamine Ethketamine Eticyclidine Gacyclidine Ketamine Methoxetamine Methoxyketamine Neramexane PCPr Phencyclidine Rolicyclidine Tenocyclidine Tiletamine

Morphinans	Dextrallorphan Dextromethorphan Dextrorphan Racemethorphan Racemorphan

Others	2-MDP 8A-PDHQ Aptiganel Dexoxadrol Dizocilpine Etoxadrol Ibogaine Midafotel NEFA Nitrous oxide Noribogaine Perzinfotel Remacemide Selfotel Xenon

Deliriants
mAChR antagonists

Miscellaneous

Cannabinoids
CB₁R agonists

Phytocannabinoids	Cannabinol THC (Dronabinol) THCV (Cannabidiol has different mechanism of action)

Synthetic	4-HTMPIPO 5F-PB-22 AB-001 AB-005 A-836,339 AB-CHMINACA AB-FUBINACA AB-PINACA ADB-FUBINACA ADB-PINACA ADBICA AM-630 AM-679 AM-694 AM-1220 AM-1221 AM-1235 AM-1241 AM-1248 AM-2201 AM-2232 AM-2233 APICA APINACA CB-13 CP 47,497 CP 55,244 CP 55,940 DMHP HU-210 HU-308 JWH-007 JWH-015 JWH-018 JWH-019 JWH-030 JWH-073 JWH-081 JWH-098 JWH-116 JWH-122 JWH-149 JWH-167 JWH-182 JWH-193 JWH-198 JWH-200 JWH-203 JWH-210 JWH-250 JWH-251 JWH-398 JWH-424 JTE 7-31 JTE-907 Levonantradol MAM-2201 MDA-19 MN-25 NESS-0327 NESS-040C5 Nabilone Nabitan Org 28611 Parahexyl QUCHIC QUPIC RCS-4 RCS-8 SDB-006 STS-135 THC-O-acetate THC-O-phosphate UR-144 WIN 55,212-2 XLR-11

D₂R agonists

Apomorphine
Aporphine
Bromocriptine
Cabergoline
Lisuride
Memantine
Nuciferine
Pergolide
Piribedil
Pramipexole
Ropinirole
Rotigotine
Also indirect D₂ agonists, such as dopamine reuptake inhibitors (cocaine, methylphenidate), releasing agents (amphetamine, methamphetamine), and precursors (levodopa).

GABA_AR agonists

Inhalants
Mixed MOA

κOR agonists

MAO inhibitors

σR agonists

Others

Histaminergics

Receptor
(ligands)

H₁	Agonists: 2-Pyridylethylamine Betahistine Histamine HTMT UR-AK49 Antagonists: 1st generation: 4-Methyldiphenhydramine Alimemazine Antazoline Azatadine Bamipine Benzatropine/Benztropine Bepotastine Bromazine Brompheniramine Buclizine Captodiame Carbinoxamine Chlorcyclizine Chloropyramine Chlorothen Chlorphenamine Chlorphenoxamine Cinnarizine Clemastine Clobenzepam Clocinizine Cyclizine Cyproheptadine Dacemazine Deptropine Dexbrompheniramine Dexchlorpheniramine Dimenhydrinate Dimetindene Diphenhydramine Diphenylpyraline Doxylamine Embramine Etodroxizine Etybenzatropine/Ethylbenztropine Etymemazine Flunarizine Histapyrrodine Homochlorcyclizine Hydroxyethylpromethazine Hydroxyzine Isopromethazine Isothipendyl Meclozine Mepyramine/Pyrilamine Mequitazine Methafurylene Methapyrilene Methdilazine Moxastine Niaprazine Orphenadrine Oxatomide Oxomemazine Phenindamine Pheniramine Phenyltoloxamine Pimethixene Piperoxan Pipoxizine Promethazine Propiomazine Pyrrobutamine Talastine Thenalidine Thenyldiamine Thiazinamium Thonzylamine Tolpropamine Tripelennamine Triprolidine; 2nd generation: Acrivastine Alinastine Astemizole Azelastine Bamirastine Barmastine Bepiastine Bepotastine Bilastine Cabastinen Carebastine Cetirizine Clemastine Clemizole Clobenztropine Dorastine Ebastine Emedastine Epinastine Flezelastine Ketotifen Latrepirdine Levocabastine Linetastine Loratadine Mapinastine Mebhydrolin Mizolastine Moxastine Noberastine Octastine Olopatadine Perastine Piclopastine Rocastine Rupatadine Setastine Talastine Temelastine Terfenadine Zepastine; 3rd generation: Desloratadine Fexofenadine Levocetirizine; Ungrouped: Belarizine Efletirizine Elbanizine Flotrenizine Medrylamine Napactadine Pibaxizine Tagorizine Trelnarizine Trenizine Vapitadine; Miscellaneous: Tricyclic antidepressants (amitriptyline, doxepin, trimipramine, etc) Tetracyclic antidepressants (mianserin, mirtazapine, etc) Typical antipsychotics (chlorpromazine, thioridazine, etc) Atypical antipsychotics (clozapine, olanzapine, quetiapine, etc)

H₂	Agonists: Amthamine Betazole Dimaprit Histamine HTMT Impromidine UR-AK49 Antagonists: Bisfentidine Burimamide Cimetidine Dalcotidine Donetidine Ebrotidine Etintidine Famotidine Lafutidine Lamtidine Lavoltidine/Loxtidine Lupitidine Metiamide Mifentidine Niperotidine Nizatidine Osutidine Oxmetidine Pibutidine Quisultazine/Quisultidine Ramixotidine Ranitidine Roxatidine Sufotidine Tiotidine Tuvatidine Venritidine Xaltidine

H₃	Agonists: α-Methylhistamine Cipralisant Histamine Imetit Immepip Immethridine Methimepip Proxyfan Antagonists: A-349,821 A-423,579 ABT-239 Betahistine Burimamide Ciproxifan Clobenpropit Conessine GSK-189,254 Impentamine Iodophenpropit JNJ-5,207,852 MK-0249 NNC-38-1,049 PF-03654746 Pitolisant SCH-79,687 Thioperamide VUF-5,681

H₄	Agonists: 4-Methylhistamine α-Methylhistamine Histamine VUF-8,430 Antagonists: JNJ-7,777,120 Thioperamide VUF-6,002

Transporter
(blockers)

VMAT	Ibogaine Reserpine Tetrabenazine

Enzyme
(inhibitors)

HDC	Catechin Meciadanol Naringenin Tritoqualine

HNMT	Amodiaquine Diphenhydramine Harmaline Metoprine Quinacrine SKF-91,488 Tacrine

DAO	Aminoguanidine

Others

Endogenous	Histamine; Precursors: L-Histidine; Cofactors: Vitamin B₆

Mepyramine

Mepyramine

Synthesis

See also

References

Categories

Xenon

Encyclopedia Article

Chloropyramine

Encyclopedia Article

Suggestions

Triprolidine

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Meclizine

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Phenyltoloxamine

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Pizotifen

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