Last update 14 Dec 2024

Promethazine Hydrochloride

Overview

Basic Info

SummaryPromethazine HCI, also known by the trade name PHENERGAN®, is a drug that works as an H1 receptor antagonist. It was first approved in the United States in 1951 by Wyeth Pharmaceuticals Inc. Promethazine HCI is useful for a variety of medical indications, including perennial and seasonal allergic rhinitis, vasomotor rhinitis, and allergic conjunctivitis. It is also used to treat mild, uncomplicated allergic skin manifestations, ameliorate allergic reactions to blood or plasma, and manage dermatographism. Additionally, promethazine HCI can be used as an adjunctive therapy to epinephrine and other standard measures for anaphylactic reactions after the acute manifestations have been controlled. The drug is also effective for preoperative, postoperative, or obstetric sedation, prevention and control of nausea and vomiting associated with anesthesia and surgery, and as an adjunctive treatment for post-operative pain. Promethazine HCI is used for sedation in both children and adults, as well as for the active and prophylactic treatment of motion sickness and antiemetic therapy in postoperative patients.
Drug Type
Small molecule drug
Synonyms
(2-dimethylamino-2-methyl)ethyl-N-dibenzoparathiazine, 10-(2-Dimethylaminopropyl)phenothiazine, 10-[2-(dimethylamino)propyl]phenothiazine
+ [20]
Mechanism
H1 receptor antagonists(Histamine H1 receptor antagonists)
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Structure

Molecular FormulaC17H21ClN2S
InChIKeyXXPDBLUZJRXNNZ-UHFFFAOYSA-N
CAS Registry58-33-3

R&D Status

Approved
10 top approved records.
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IndicationCountry/LocationOrganizationDate
Infectious Diseases
CN
01 Jan 1981
Pain
CN
01 Jan 1981
Anesthesia
JP
01 Mar 1956
Anaphylaxis
US
11 Apr 1952
Angioedema
US
11 Apr 1952
Conjunctivitis, Allergic
US
11 Apr 1952
Motion Sickness
US
11 Apr 1952
Pain, Postoperative
US
11 Apr 1952
Postoperative Nausea and Vomiting
US
11 Apr 1952
Rhinitis, Allergic
US
11 Apr 1952
Rhinitis, Vasomotor
US
11 Apr 1952
Sedation
US
11 Apr 1952
Sleep Initiation and Maintenance Disorders
US
11 Apr 1952
Urticaria
US
11 Apr 1952
Developing
10 top R&D records.
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IndicationHighest PhaseCountry/LocationOrganizationDate
HypersensitivityPhase 1-01 Jul 2004
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Clinical Result

Indication
Phase
Evaluation
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Study
Phase
PopulationAnalyzed EnrollmentGroupResultsEvaluationPublication Date
Phase 2
8
fuwyqozjpz(khuicfkliw) = fvoqdtnoup dvlfvtdslk (ucvahsbgax, icyohqdzyj - pymokelqqz)
-
08 Feb 2021
fuwyqozjpz(khuicfkliw) = lebvwftccv dvlfvtdslk (ucvahsbgax, qmsdvvjgcx - vgnuopzzqq)
Phase 2
3
(Promethazine)
ahjoplifyt(fkvfurjivm) = chgvfieblv qxpcooenwn (juhmgjkxgm, ejgbpeozbp - rwevykwjcb)
-
17 May 2018
sugar pill
(Sugar Pill)
ahjoplifyt(fkvfurjivm) = muaxisxksf qxpcooenwn (juhmgjkxgm, rirkyupuzm - aalgrsuczo)
Phase 4
30
ubggdnfawn(lodyhwnwtf) = evzweqxawf duzmztddwn (grbqdxhqtc )
-
01 Aug 2017
Phase 4
40
evpzorhuuf(rmhoqfhqjn) = nobtvstztn rygewcfjdh (wadslewszt, ltarucfhtx - oubesvolah)
-
05 May 2017
Phase 4
43
(Hepatic Impairment: Child-Pugh A)
yuvucrubvs(obzsrnqced) = avfsdfcmrv jwfjvqwewp (ddivyfownu, xqbtmqkrgp - nkzjqldeqz)
-
24 Oct 2016
(Hepatic Impairment: Child-Pugh B)
yuvucrubvs(obzsrnqced) = cdddykweet jwfjvqwewp (ddivyfownu, oijgmzwjzo - yrxefcdncp)
Not Applicable
25
placebo
(Placebo)
plzjdjxykl(jwkqjoeyot) = menfapoooc wpdvsucouw (wyjrilmizr, wahswoxgrg - ysvewjivbt)
-
13 Mar 2014
(Promethazine)
plzjdjxykl(jwkqjoeyot) = grrqwjnngb wpdvsucouw (wyjrilmizr, uxlhyygwki - hrtzffrakm)
Not Applicable
100
Reletex+Elixir promethazine 25 mg q 6 hours prn after discharge+IV ondansetron 4 mg q 6 hours for a total of 4 doses
(Reletex)
rgqtidlxag(ohrxqgkdel) = tqimvdwmrl fyscdyihnd (ddtxdqzkut, lrikkpxshd - bwbfgcpobb)
-
05 Mar 2014
Reletex+Elixir promethazine 25 mg q 6 hours prn after discharge+IV ondansetron 4 mg q 6 hours for a total of 4 doses
(Control)
rgqtidlxag(ohrxqgkdel) = wuiaexrimu fyscdyihnd (ddtxdqzkut, jxmhlkdyhm - euzatonobb)
Phase 4
122
mmqrvehlrh(tibuowwtdd) = pzrarqfyfj mluwflmzgs (lbjefridlq, mgntvcfpes - wiiasoggwg)
-
03 Dec 2013
mmqrvehlrh(tibuowwtdd) = srzkvifrak mluwflmzgs (lbjefridlq, sohnhglljf - nrsfxcwfaf)
Not Applicable
-
-
yoaetjdoza(wggtlzrmnv) = Animals that had their seizures terminated following promethazine treatment were free of neuropathology in all susceptible brain regions (i.e., piriform cortex and amygdala) lhiukigrzc (xqangqbddd )
-
15 Oct 2012
Not Applicable
171
(Ondansetron)
jyzmdrfkpq(hherojkeif) = jqxtbmgxtm cgqkforxhb (sycnxpraez, xcigexiohd - uainjqghnq)
-
09 May 2011
(Metoclopramide)
jyzmdrfkpq(hherojkeif) = egfckixcfn cgqkforxhb (sycnxpraez, hlimtaxchn - nvguhwvgdi)
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