'''Propiomazine''', sold under the brand name '''Propavan''' among others, is an [[antihistamine]] which is used to treat [[insomnia]] and to produce [[sedation]] and relieve [[anxiety]] before or during [[surgery]] or other procedures and in combination with [[analgesic]]s as well as during [[childbirth|labor]]. Propiomazine is a [[phenothiazine]], but is not used therapeutically as a [[neuroleptic]] because it does not block [[dopamine receptors]] well.{{Citation needed|date=July 2022}}
'''Propiomazine''', sold under the brand name '''Propavan''' among others, is an [[antihistamine]] which is used to treat [[insomnia]] and to produce [[sedation]] and relieve [[anxiety]] before or during [[surgery]] or other procedures and in combination with [[analgesic]]s as well as during [[childbirth|labor]].<ref name="MortonHall2012">{{cite book | author1 = I.K. Morton | author2 = Judith M. Hall | date = 6 December 2012 | title = Concise Dictionary of Pharmacological Agents: Properties and Synonyms | publisher = Springer Science & Business Media | pages = 234– | isbn = 9789401144391 | oclc = 1243535030 | url = https://books.google.com/books?id=tsjrCAAAQBAJ&pg=PA234}}</ref>{{Additional citation needed|date=July 2022}} Propiomazine is a [[phenothiazine]],<ref name="MortonHall2012" /> but is not used therapeutically as a [[neuroleptic]] because it does not block [[dopamine receptors]] well.{{Citation needed|date=July 2022}}
==Medical uses==
==Medical uses==
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==Pharmacology==
==Pharmacology==
===Mechanism of action===
===Pharmacodynamics===
Propiomazine is an [[receptor antagonist|antagonist]] of the [[dopamine]] [[D1 receptor|D<sub>1</sub>]], [[D2 receptor|D<sub>2</sub>]], and [[D4 receptor|D<sub>4</sub> receptor]]s, the [[serotonin]] [[5-HT2A receptor|5-HT<sub>2A</sub>]] and [[5-HT2C receptor|5-HT<sub>2C</sub> receptor]]s, the [[muscarinic acetylcholine receptor]]s [[muscarinic acetylcholine receptor M1|M<sub>1</sub>]], [[muscarinic acetylcholine receptor M2|M<sub>2</sub>]], [[muscarinic acetylcholine receptor M3|M<sub>3</sub>]], [[muscarinic acetylcholine receptor M4|M<sub>4</sub>]], and [[muscarinic acetylcholine receptor M5|M<sub>5</sub> receptor]]s, [[alpha-1 adrenergic receptor|α<sub>1</sub>-adrenergic receptor]], and [[histamine]] [[H1 receptor|H<sub>1</sub> receptor]].{{Citation needed|date=July 2022}}
Propiomazine is an [[receptor antagonist|antagonist]] of the [[dopamine]] [[D1 receptor|D<sub>1</sub>]], [[D2 receptor|D<sub>2</sub>]], and [[D4 receptor|D<sub>4</sub> receptor]]s, the [[serotonin]] [[5-HT2A receptor|5-HT<sub>2A</sub>]] and [[5-HT2C receptor|5-HT<sub>2C</sub> receptor]]s, the [[muscarinic acetylcholine receptor]]s [[muscarinic acetylcholine receptor M1|M<sub>1</sub>]], [[muscarinic acetylcholine receptor M2|M<sub>2</sub>]], [[muscarinic acetylcholine receptor M3|M<sub>3</sub>]], [[muscarinic acetylcholine receptor M4|M<sub>4</sub>]], and [[muscarinic acetylcholine receptor M5|M<sub>5</sub> receptor]]s, [[alpha-1 adrenergic receptor|α<sub>1</sub>-adrenergic receptor]], and [[histamine]] [[H1 receptor|H<sub>1</sub> receptor]].{{Citation needed|date=July 2022}}
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==Chemistry==
==Chemistry==
Propiomazine, also known as 10-(2-dimethylaminopropyl)-2-propionylphenothiazine or as propionylpromethazine, is a [[phenothiazine]] [[chemical derivative|derivative]] and is [[structural analog|structurally related]] to [[promethazine]].
Propiomazine, also known as 10-(2-dimethylaminopropyl)-2-propionylphenothiazine or as propionylpromethazine, is a [[phenothiazine]] [[chemical derivative|derivative]]<ref name="MortonHall2012" /> and is [[structural analog|structurally related]] to [[promethazine]]. The compound is provided medically as the [[hydrochloride]] and [[maleate]] [[salt (chemistry)|salt]]s.<ref name="SwissPharmaceuticalSociety2000" /><ref name="MortonHall2012" /><ref name="Negwer2001" />
Propiomazine has been used in the treatment of insomnia, though little evidence exists to inform its use for this indication.[2]
Side effects
Drowsiness is a usual side effect. Rare, serious side effects include convulsions (seizures); difficult or unusually fast breathing; fast or irregular heartbeat or pulse; fever (high); high or low blood pressure; loss of bladder control; muscle stiffness (severe); unusual increase in sweating; unusually pale skin; and unusual tiredness or weakness.[citation needed]