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词条 Dextrorphan
释义

  1. Pharmacology

     Pharmacodynamics  Pharmacokinetics 

  2. Society and culture

     Legal status 

  3. Research

  4. References

{{Distinguish|Dextromethorphan|Dextrallorphan}}{{Drugbox
| Verifiedfields = changed
| Watchedfields = changed
| verifiedrevid = 408496712
| IUPAC_name = (+)-17-methyl-9a,13a,14a-morphinan-3-ol
| image = Dextrorphan.svg
| image2 = Dextrorphane 3d.gif
| tradename =
| legal_US = Unscheduled
| CAS_number_Ref = {{cascite|correct|??}}
| CAS_number = 125-73-5
| ATC_prefix = None
| PubChem = 5360697
| UNII_Ref = {{fdacite|changed|FDA}}
| UNII = 04B7QNO9WS
| ChEMBL_Ref = {{ebicite|changed|EBI}}
| ChEMBL = 341216
| ChemSpiderID_Ref = {{chemspidercite|changed|chemspider}}
| ChemSpiderID = 10489895
| synonyms = DXO
| C=17 | H=23 | N=1 | O=1
| molecular_weight = 257.371 g/mol
| SMILES = OC1=CC2=C(C[C@@H]3N(CC[C@@]42CCCC[C@H]34)C)C=C1
| StdInChI_Ref = {{stdinchicite|changed|chemspider}}
| StdInChI = 1S/C17H23NO/c1-18-9-8-17-7-3-2-4-14(17)16(18)10-12-5-6-13(19)11-15(12)17/h5-6,11,14,16,19H,2-4,7-10H2,1H3/t14-,16+,17+/m1/s1
| StdInChIKey_Ref = {{stdinchicite|changed|chemspider}}
| StdInChIKey = JAQUASYNZVUNQP-PVAVHDDUSA-N
}}Dextrorphan (DXO) is a psychoactive drug of the morphinan class which acts as an antitussive or cough suppressant and dissociative hallucinogen. It is the dextrorotatory-stereoisomer of racemorphan, the levo-half being levorphanol. Dextrorphan is produced by O-demethylation of dextromethorphan by CYP2D6. Dextrorphan is an NMDA antagonist and contributes to the psychoactive effects of dextromethorphan.[1]

Pharmacology

Pharmacodynamics

Dextrorphan[2][3][4][5]
Site Ki (nM) Species Ref
{{abbr>NMDAR|N-Methyl-D-aspartate receptor}}
(MK-801)
486–906 Rat [3]
σ1 118–481 Rat [3]
σ2 11,325–15,582 Rat [3]
{{abbrlink>MOR|μ-Opioid receptor}} 420
>1,000
Rat
Human
[3][6]
DOR|δ-Opioid receptor}} 34,700 Rat [3]
KOR|κ-Opioid receptor}} 5,950 Rat [3]
{{abbrlink>SERT|Serotonin transporter}} 401–484 Rat [3]
{{abbrlink>NET|Norepinephrine transporter}} ≥340 Rat [3]
DAT|Dopamine transporter}} >1,000 Rat [3]
5-HT1A >1,000 Rat [3]
5-HT1B/1D 54% at 1 μM Rat [3]
5-HT2A >1,000 Rat [3]
α1 >1,000 Rat [3]
α2 >1,000 Rat [3]
β 35% at 1 μM Rat [3]
D2 >1,000 Rat [3]
H1 95% at 1 μM Rat [3]
{{abbrlink>mAChRs|Muscarinic acetylcholine receptors}} 100% at 1 μM Rat [3]
{{abbrlink>nAChRs|Nicotinic acetylcholine receptors}} 1,300–29,600
(IC50)
Rat [3]
VDSCs|Voltage-dependent sodium channels}}ND|No data}}ND|No data}}ND|No data}}
Values are Ki (nM), unless otherwise noted. The smaller the value, the more strongly the drug binds to the site.

The pharmacology of dextrorphan is similar to that of dextromethorphan (DXM). However, dextrorphan is much more potent as an NMDA receptor antagonist as well much less active as a serotonin reuptake inhibitor, but retains DXM's activity as a norepinephrine reuptake inhibitor.[7]

Pharmacokinetics

Dextrorphan has a notably longer elimination half-life than its parent compound, and therefore has a tendency to accumulate in the blood after repeated administration of normally dosed dextromethorphan formulations.{{citation needed|date=November 2016}}

Society and culture

Legal status

Dextrorphan was formerly a Schedule I controlled substance in the United States, but was unscheduled on October 1, 1976.[8]

Research

Dextrorphan was under development for the treatment of stroke, and reached phase II clinical trials for this indication, but development was discontinued.[9]

{{Clear}}

References

1. ^{{cite journal | last1 = Zawertailo | first1 = L. A. | last2 = Kaplan | first2 = H. L. | last3 = Busto | first3 = U. E. | last4 = Tyndale | first4 = R. F. | last5 = Sellers | first5 = E. M. | title = Psychotropic Effects of Dextromethorphan are Altered by the CYP2D6 Polymorphism: A Pilot Study | pmid = 9690700 | journal = Journal of Clinical Psychopharmacology | volume = 18 | issue = 4 |date=Aug 1998 | pages = 332–337 | doi = 10.1097/00004714-199808000-00014 }}
2. ^{{cite web | title = PDSP Ki Database | work = Psychoactive Drug Screening Program (PDSP) | author1 = Roth, BL | author2 = Driscol, J | publisher = University of North Carolina at Chapel Hill and the United States National Institute of Mental Health | accessdate = 14 August 2017 | url = https://pdsp.unc.edu/databases/pdsp.php?knowID=0&kiKey=&receptorDD=&receptor=&speciesDD=&species=&sourcesDD=&source=&hotLigandDD=&hotLigand=&testLigandDD=&testFreeRadio=testFreeRadio&testLigand=dextrorphan&referenceDD=&reference=&KiGreater=&KiLess=&kiAllRadio=all&doQuery=Submit+Query}}
3. ^10 11 12 13 14 15 16 17 18 19 {{cite journal | vauthors = Nguyen L, Thomas KL, Lucke-Wold BP, Cavendish JZ, Crowe MS, Matsumoto RR | title = Dextromethorphan: An update on its utility for neurological and neuropsychiatric disorders | journal = Pharmacol. Ther. | volume = 159 | issue = | pages = 1–22 | year = 2016 | pmid = 26826604 | doi = 10.1016/j.pharmthera.2016.01.016 | url = }}
4. ^{{cite journal | vauthors = Werling LL, Keller A, Frank JG, Nuwayhid SJ | title = A comparison of the binding profiles of dextromethorphan, memantine, fluoxetine and amitriptyline: treatment of involuntary emotional expression disorder | journal = Exp. Neurol. | volume = 207 | issue = 2 | pages = 248–57 | year = 2007 | pmid = 17689532 | doi = 10.1016/j.expneurol.2007.06.013 | url = }}
5. ^{{cite journal | vauthors = Taylor CP, Traynelis SF, Siffert J, Pope LE, Matsumoto RR | title = Pharmacology of dextromethorphan: Relevance to dextromethorphan/quinidine (Nuedexta®) clinical use | journal = Pharmacol. Ther. | volume = 164 | issue = | pages = 170–82 | year = 2016 | pmid = 27139517 | doi = 10.1016/j.pharmthera.2016.04.010 | url = }}
6. ^{{cite journal | vauthors = Raynor K, Kong H, Mestek A, Bye LS, Tian M, Liu J, Yu L, Reisine T | title = Characterization of the cloned human mu opioid receptor | journal = J. Pharmacol. Exp. Ther. | volume = 272 | issue = 1 | pages = 423–8 | year = 1995 | pmid = 7815359 | doi = | url = }}
7. ^{{ cite journal | url = http://jpet.aspetjournals.org/content/309/2/515.full.pdf | format = pdf | title = Comparison of the Effects of Dextromethorphan, Dextrorphan, and Levorphanol on the Hypothalamo-Pituitary-Adrenal Axis |author1=Pechnick, R. N. |author2=Poland, R. E. | year = 2004 | volume = 309 | issue = 2 | pages = 515–522 | journal = Journal of Pharmacology and Experimental Therapeutics | doi = 10.1124/jpet.103.060038 | pmid = 14742749 }}
8. ^{{cite web | url = http://www.deadiversion.usdoj.gov/schedules/orangebook/orangebook.pdf | title = Lists of: Scheduling Actions Controlled Substances Regulated Chemicals | author = DEA | accessdate = 2010-09-24}}
9. ^http://adisinsight.springer.com/drugs/800009336
{{Antitussives}}{{Navboxes
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| title = Pharmacodynamics
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11 : Antitussives|Dissociative drugs|Enantiopure drugs|Euphoriants|Morphinans|Mu-opioid agonists|Nicotinic antagonists|NMDA receptor antagonists|Phenols|Serotonin-norepinephrine reuptake inhibitors|Sigma agonists

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