PENTAZOCINE

Details

Stereochemistry	RACEMIC
Molecular Formula	C19H27NO
Molecular Weight	285.4238
Optical Activity	( + / - )
Defined Stereocenters	3 / 3
E/Z Centers	0
Charge	0

SHOW SMILES / InChI

Structure Search

SMILES

C[C@H]1[C@H]2CC3=CC=C(O)C=C3[C@]1(C)CCN2CC=C(C)C

InChI

InChIKey=VOKSWYLNZZRQPF-GDIGMMSISA-N

InChI=1S/C19H27NO/c1-13(2)7-9-20-10-8-19(4)14(3)18(20)11-15-5-6-16(21)12-17(15)19/h5-7,12,14,18,21H,8-11H2,1-4H3/t14-,18+,19+/m0/s1

HIDE SMILES / InChI

Molecular Formula	C19H27NO
Molecular Weight	285.4238
Charge	0
Count

Stereochemistry	ABSOLUTE
Additional Stereochemistry	No
Defined Stereocenters	3 / 3
E/Z Centers	0
Optical Activity	UNSPECIFIED

Description
Sources: https://www.drugs.com/cdi/pentazocine.html | https://www.ncbi.nlm.nih.gov/pubmed/23370666
Curator's Comment: description was created based on several sources, including https://www.ncbi.nlm.nih.gov/pubmed/12379919 | https://www.accessdata.fda.gov/drugsatfda_docs/label/2016/016194s079s080lbl.pdf | https://www.drugbank.ca/drugs/DB00652

Pentazocine is a synthetically prepared prototypical mixed agonist-antagonist narcotic (opioid analgesic) drug of the benzomorphan class of opioids used to treat moderate to moderately severe pain. Pentazocine is sold under several brand names, such as Fortral, Sosegon, Talwin NX. Pentazocine acts as an agonist of κ-opioid receptors and as an antagonist of μ-opioid receptors. This compound may exist as one of two enantiomers, named (+)-pentazocine and (−)-pentazocine. Side effects are similar to those of morphine, but pentazocine, due to its action at the kappa opioid receptor is more likely to invoke psychotomimetic effects. High dose may cause high blood pressure or high heart rate.

CNS Activity

Originator

Approval Year

Targets

Primary Target	Pharmacology	Condition	Potency
Mu opioid receptor 231 Target ID: CHEMBL233 Sources: https://www.ncbi.nlm.nih.gov/pubmed/2831363	Antagonist 2849		6.9 nM [Ki]
Kappa opioid receptor 115 Target ID: CHEMBL237 Sources: https://www.ncbi.nlm.nih.gov/pubmed/2831363	Agonist 2752		75.0 nM [Ki]

Conditions

Condition	Modality	Targets	Highest Phase	Product
Pain 619 Sources: https://www.accessdata.fda.gov/drugsatfda_docs/label/2016/016194s079s080lbl.pdf	Primary		Approved 8583	TALWIN Approved Use Pentazocine Hydrochloride and Naloxone Hydrochloride Tablets, USP is indicated for the relief of moderate to severe pain. Pentazocine Hydrochloride and Naloxone Hydrochloride Tablets, USP is indicated for oral use only. Launch Date 1967

C_max

Value	Dose	Co-administered	Analyte	Population
102 ng/mL EXPERIMENT https://pubmed.ncbi.nlm.nih.gov/3709032/	40 mg single, intramuscular dose: 40 mg route of administration: Intramuscular experiment type: SINGLE co-administered:		PENTAZOCINE plasma	Homo sapiens population: HEALTHY age: ADULT sex: UNKNOWN food status: UNKNOWN
227 ng/mL EXPERIMENT https://pubmed.ncbi.nlm.nih.gov/3709032/	80 mg single, intramuscular dose: 80 mg route of administration: Intramuscular experiment type: SINGLE co-administered:		PENTAZOCINE plasma	Homo sapiens population: HEALTHY age: ADULT sex: UNKNOWN food status: UNKNOWN

AUC

Value	Dose	Co-administered	Analyte	Population
536 ng × h/mL EXPERIMENT https://pubmed.ncbi.nlm.nih.gov/3709032/	40 mg single, intramuscular dose: 40 mg route of administration: Intramuscular experiment type: SINGLE co-administered:		PENTAZOCINE plasma	Homo sapiens population: HEALTHY age: ADULT sex: UNKNOWN food status: UNKNOWN
1311 ng × h/mL EXPERIMENT https://pubmed.ncbi.nlm.nih.gov/3709032/	80 mg single, intramuscular dose: 80 mg route of administration: Intramuscular experiment type: SINGLE co-administered:		PENTAZOCINE plasma	Homo sapiens population: HEALTHY age: ADULT sex: UNKNOWN food status: UNKNOWN

T_1/2

Value	Dose	Co-administered	Analyte	Population
4.6 h EXPERIMENT https://pubmed.ncbi.nlm.nih.gov/3709032/	40 mg single, intramuscular dose: 40 mg route of administration: Intramuscular experiment type: SINGLE co-administered:		PENTAZOCINE plasma	Homo sapiens population: HEALTHY age: ADULT sex: UNKNOWN food status: UNKNOWN
5.3 h EXPERIMENT https://pubmed.ncbi.nlm.nih.gov/3709032/	80 mg single, intramuscular dose: 80 mg route of administration: Intramuscular experiment type: SINGLE co-administered:		PENTAZOCINE plasma	Homo sapiens population: HEALTHY age: ADULT sex: UNKNOWN food status: UNKNOWN

Doses

Dose	Population	Adverse events
30 mg single, intramuscular Dose: 30 mg Route: intramuscular Route: single Dose: 30 mg Sources: https://www.accessdata.fda.gov/drugsatfda_docs/label/2019/016194s081lbl.pdf	unhealthy Health Status: unhealthy Sources: https://www.accessdata.fda.gov/drugsatfda_docs/label/2019/016194s081lbl.pdf	Disc. AE: Respiratory depression, Hypotension... AEs leading to discontinuation/dose reduction: Respiratory depression Hypotension (severe) Sources: https://www.accessdata.fda.gov/drugsatfda_docs/label/2019/016194s081lbl.pdf
30 mg single, intramuscular Dose: 30 mg Route: intramuscular Route: single Dose: 30 mg Sources: https://www.accessdata.fda.gov/drugsatfda_docs/label/2019/016194s081lbl.pdf	unhealthy Health Status: unhealthy Sources: https://www.accessdata.fda.gov/drugsatfda_docs/label/2019/016194s081lbl.pdf	Disc. AE: Sedation, Coma... AEs leading to discontinuation/dose reduction: Sedation Coma Sources: https://www.accessdata.fda.gov/drugsatfda_docs/label/2019/016194s081lbl.pdf

AEs

AE	Significance	Dose	Population
Respiratory depression	Disc. AE	30 mg single, intramuscular Dose: 30 mg Route: intramuscular Route: single Dose: 30 mg Sources: https://www.accessdata.fda.gov/drugsatfda_docs/label/2019/016194s081lbl.pdf	unhealthy Health Status: unhealthy Sources: https://www.accessdata.fda.gov/drugsatfda_docs/label/2019/016194s081lbl.pdf
Hypotension	severe Disc. AE	30 mg single, intramuscular Dose: 30 mg Route: intramuscular Route: single Dose: 30 mg Sources: https://www.accessdata.fda.gov/drugsatfda_docs/label/2019/016194s081lbl.pdf	unhealthy Health Status: unhealthy Sources: https://www.accessdata.fda.gov/drugsatfda_docs/label/2019/016194s081lbl.pdf
Coma	Disc. AE	30 mg single, intramuscular Dose: 30 mg Route: intramuscular Route: single Dose: 30 mg Sources: https://www.accessdata.fda.gov/drugsatfda_docs/label/2019/016194s081lbl.pdf	unhealthy Health Status: unhealthy Sources: https://www.accessdata.fda.gov/drugsatfda_docs/label/2019/016194s081lbl.pdf
Sedation	Disc. AE	30 mg single, intramuscular Dose: 30 mg Route: intramuscular Route: single Dose: 30 mg Sources: https://www.accessdata.fda.gov/drugsatfda_docs/label/2019/016194s081lbl.pdf	unhealthy Health Status: unhealthy Sources: https://www.accessdata.fda.gov/drugsatfda_docs/label/2019/016194s081lbl.pdf

Overview

CYP3A4	CYP2C9	CYP2D6	hERG
substrate 1946			inhibitor 2217

OverviewOther

Other Inhibitor	Other Substrate	Other Inducer
Nav1.5 116	CYP1A2 1197 P-gp 2052

Drug as victim

Target	Modality	Activity
CYP1A2 1197	substrate 4014 Sources: https://pubmed.ncbi.nlm.nih.gov/17823102/ Page: 6.0	likely
CYP3A4 1946	substrate 4014 Sources: https://pubmed.ncbi.nlm.nih.gov/17823102/ Page: 6.0	likely
P-gp 2052	substrate 4014 Sources: https://europepmc.org/article/med/24915880#R34	yes

Tox targets

Target	Modality	Activity	Metabolite	Clinical evidence
Nav1.5 119	inhibitor 2237 Sources: https://pubmed.ncbi.nlm.nih.gov/19279232/ Page: 3.0
hERG 2263	inhibitor 2237 Sources: https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3151040/

Sourcing

Vendor/Aggregator	ID	URL
Chemieliva Pharmaceutical Co., Ltd	PBCM1405771
Compound Cloud	441277
Compound Cloud	441278
Compound Cloud	656697
Finetech	FT-0673607	http://www.finetechnology-ind.com/product/All%20product%20List/7488-49-5.html
MuseChem	I011222	https://www.musechem.com/product/I011222.html
NovoSeek	441278
Smolecule	S538980	http://www.smolecule.com/products/s538980
Smolecule	S538981	http://www.smolecule.com/products/s538981
Tetrahedron	TS54857
THE BioTek	bt-278515	https://www.thebiotek.com/product/inhibitors/bt-278515
THE BioTek	bt-278516	https://www.thebiotek.com/product/inhibitors/bt-278516
Yick-Vic Chemicals & Pharmaceuticals (HK) Ltd.	PH-0691A
ZINC	ZINC000000000596	http://zinc15.docking.org/substances/ZINC000000000596

PubMed

Title	Date	PubMed
Pentazocine addict nephropathy: a case report.	1992 Mar	1316215
Anti-inflammatory and analgesic activity of Indian Hypericum perforatum L.	2001 Apr	11491578
Pharmacological actions of AH-9700 on micturition reflex in anesthetized rats.	2001 Jan 26	11165228
The opioid peptide analogue biphalin induces less physical dependence than morphine.	2001 Jul 20	11508644
[Analysis of prehospital analgesia administered to victims with traumatic injuries].	2001 Jul-Aug	11586642
Post operative pain therapy: a survey of prescribing patterns and adequacy of analgesia in Ibadan, Nigeria.	2001 Mar	11961861
[Influence of intubation maneuver with or without premedication for intracranial hemorrhage with unconsciousness].	2001 Mar	11296398
Chitosan based pentazocine microspheres for intranasal systemic delivery: development and biopharmaceutical evaluation.	2001 Mar	11265588
[UV-densitometry determination of pentazocine hydrochloride in tablets after low temperature extraction].	2001 May-Jun	11548553
Modulation of serotonergic neurotransmission by short- and long-term treatments with sigma ligands.	2001 Oct	11588125
[Biopharmaceutical studies on molecular mechanisms of membrane transport].	2002 Dec	12510384
Fibromyositis after intramuscular pentazocine abuse.	2002 Jul-Sep	12432208
Synthesis and evaluation of [18F]fluoroethyl SA4503 as a PET ligand for the sigma receptor.	2002 Mar 15	11835521
Synthesis and evaluation of 3-(4-chlorobenzyl)-8-[11C]methoxy-1,2,3,4-tetrahydrochromeno[3,4-c]pyridin-5-one: a PET tracer for imaging sigma(1) receptors.	2002 May	12031882
Investigation of transport mechanism of pentazocine across the blood-brain barrier using the in situ rat brain perfusion technique.	2002 Nov	12379919
Investigation on the influx transport mechanism of pentazocine at the blood-brain barrier in rats using the carotid injection technique.	2002 Oct	12392093
Antidiarrhoeal properties of a novel sigma ligand (JO 2871) on toxigenic diarrhoea in mice: mechanisms of action.	2002 Oct	12235074
Subarachnoid block for lower abdominal and lower limb surgery: UITH experience.	2002 Oct-Dec	12955990
Agonist/antagonist properties of nalbuphine, butorphanol and (-)-pentazocine in male vs. female rats.	2003 Apr	12759132
Enhanced sensitivity to the antinociceptive effects of kappa opioids in naltrexone-treated rats: dose- and time-dependent effects.	2003 Dec	14665981
Differential effects of agonists on adenylyl cyclase superactivation mediated by the kappa opioid receptors: adenylyl cyclase superactivation is independent of agonist-induced phosphorylation, desensitization, internalization, and down-regulation.	2003 Dec	14557376
SR31747A is a sigma receptor ligand exhibiting antitumoural activity both in vitro and in vivo.	2003 Feb 10	12569389
Analgesic activity of Piper longum Linn. root.	2003 Jun	15266916
[Neurochemical analysis and pharmacological regulation of the corticofugal control of the nociceptive signals in the afferent pathways].	2003 Mar-Apr	12962044
Opioid agonists have different efficacy profiles for G protein activation, rapid desensitization, and endocytosis of mu-opioid receptors.	2003 May 23	12642578
Modulation of Fas receptor proteins and dynamin during opiate addiction and induction of opiate withdrawal in rat brain.	2003 Nov	14530904
Dose ratio is important in maximizing naloxone enhancement of nalbuphine analgesia in humans.	2003 Nov 6	14550900
Procaine hydrochloride fails to relieve pain in patients with acute pancreatitis.	2004	14755147
Antiproliferative and cytotoxic effects of some sigma2 agonists and sigma1 antagonists in tumour cell lines.	2004 Aug	15322732
[Intermittent complete left bundle branch block during general anesthesia].	2004 Dec	15682804
Molecular modeling of sigma 1 receptor ligands: a model of binding conformational and electrostatic considerations.	2004 Jan	14629980
Pentazocine-induced cutaneous sclerosis and panniculitis in an Indian male.	2004 Jul	15230891
Involvement of P-glycoprotein in blood-brain barrier transport of pentazocine in rats using brain uptake index method.	2004 Jun	15187451
Sigma-2 receptors are specifically localized to lipid rafts in rat liver membranes.	2004 Jun 16	15189760
Sternoclavicular septic arthritis: review of 180 cases.	2004 May	15118542
Intrathecal morphine, but not buprenorphine or pentazocine, can induce spastic paraparesis after a noninjurious interval of spinal cord ischemia in the rat.	2004 Nov	15502059
Modulation of bradykinin-induced calcium changes in SH-SY5Y cells by neurosteroids and sigma receptor ligands via a shared mechanism.	2004 Nov	15352135
[Case report of pentazocine dependence from a standpoint of the cognitive therapy].	2004 Oct	15573677
Retroperitoneoscopic live donor nephrectomy: extended experience in a single center.	2004 Sep	15518698
Vitamin B12-associated localized scleroderma and its treatment.	2004 Sep	15355372
Sex-related psychological predictors of baseline pain perception and analgesic responses to pentazocine.	2005 Apr	15740828
Using mixed agonist-antagonists.	2005 Feb	15706252

Patents

Sample Use Guides

In Vivo Use Guide

Initial dose: 30 mg by intramuscular, subcutaneous, or intravenous route. This may be repeated every 3 to 4 hours. Doses in excess of 30 mg intravenously or 60 mg intramuscularly or subcutaneously are not recommended. Maximum daily dose: 360 mg

Route of Administration: Other

In Vitro Use Guide

Cultured bovine adrenal medullary cells (1 × 10^6 / well) or SK-N-SH cells (0.3 × 10^6 / well) were preincubated with or without PTZ (Pentazocine) for the indicated times and further incubated at 37°C for another 12 min in KRH buffer containing 100 μM pargyline, 1 mM ascorbic acid, and [3H]NE (500 or 100 nM, respectively, 0.1 μCi) in the presence or absence of desipramine and PTZ. KRH buffer was composed of 154 mM NaCl, 5.6 mM KCl, 1.1 mM MgSO4, 2.2 mM CaCl2, 10 mM HEPES-Tris, and 10 mM glucose, adjusted to pH 7.4. After incubation, the cells were rapidly washed three times with 250 μl of ice-cold KRH buffer and solubilized in 500 μl of 10% Triton X-100. The radioactivity in the solubilized cells was counted with a liquid scintillation counter.

Substance Class	Chemical Created by `admin` on `Mon Mar 31 17:48:17 GMT 2025` Edited by `admin` on `Mon Mar 31 17:48:17 GMT 2025`
Record UNII	RP4A60D26L
Record Status	`Validated (UNII)`
Record Version

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Name

Type

Language

PENTAZOCINE

Official Name

English

PENTAZOCINE CIV

Preferred Name

English

(±)-PENTAZOCINE

Common Name

English

TALWIN

Brand Name

English

PENTAZOCINE [JAN]

Common Name

English

PENTAZOCINE [EP IMPURITY]

Common Name

English

PENTAZOCINE [HSDB]

Common Name

English

PENTAZOCINE [MART.]

Common Name

English

CIS-(±)-PENTAZOCINE

Common Name

English

NSC-107430

Code

English

WIN 20,228

Code

English

DL-PENTAZOCINE

Common Name

English

NIH-7958

Code

English

2,6-METHANO-3-BENZAZOCIN-8-OL, 1,2,3,4,5,6-HEXAHYDRO-6,11-DIMETHYL-3-(3-METHYL-2-BUTEN-1-YL)-, (2R,6R,11R)-REL-

Common Name

English

PENTAZOCINE [VANDF]

Common Name

English

pentazocine [INN]

Common Name

English

2,6-METHANO-3-BENZAZOCIN-8-OL, 1,2,3,4,5,6-HEXAHYDRO-6,11-DIMETHYL-3-(3-METHYL-2-BUTENYL)-, (2.ALPHA.,6.ALPHA.,11R*)-

Common Name

English

WIN-20228

Code

English

PENTAZOCINE CIV [USP-RS]

Common Name

English

Pentazocine [WHO-DD]

Common Name

English

(2R*,6R*,11R*)-1,2,3,4,5,6-HEXAHYDRO-6,11-DIMETHYL-3-(3-METHYL-2-BUTENYL)-2,6-METHANO-3-BENZAZOCIN-8-OL

Common Name

English

PENTAZOCINE [EP MONOGRAPH]

Common Name

English

PENTAZOCINE [USAN]

Common Name

English

PENTAZOCINE [MI]

Common Name

English

PENTAZOCINE [USP MONOGRAPH]

Common Name

English

Classification Tree Code System Code

NCI_THESAURUS

C67413