Levomethadyl acetate is demethylated to nor-levomethadyl acetate which is again demethylated to dinor-levomethadyl acetate. This extensive first pass metabolism produces 2 metabolites that are more active than the parent drug.
Levomethadyl acetate undergoes extensive first-pass metabolism to the active demethylated metabolite nor-levomethadyl acetate, which is further demethylated to a second active metabolite, dinor-levomethadyl acetate. These metabolites are more potent than the parent drug.
Half Life: 2.6 days
Opiate receptors (Mu, Kappa, Delta) are coupled with G-protein receptors and function as both positive and negative regulators of synaptic transmission via G-proteins that activate effector proteins. Binding of the opiate stimulates the exchange of GTP for GDP on the G-protein complex. As the effector system is adenylate cyclase and cAMP located at the inner surface of the plasma membrane, opioids decrease intracellular cAMP by inhibiting adenylate cyclase. Subsequently, the release of nociceptive neurotransmitters such as substance P, GABA, dopamine, acetylcholine and noradrenaline is inhibited. Opioids also inhibit the release of vasopressin, somatostatin, insulin and glucagon. Levomethadyl acetate effectively opens calcium-dependent inwardly rectifying potassium channels (OP1 receptor agonist), resulting in hyperpolarization and reduced neuronal excitability.
来源:Toxin and Toxin Target Database (T3DB)
毒理性
致癌物分类
对人类无致癌性(未列入国际癌症研究机构IARC清单)。
No indication of carcinogenicity to humans (not listed by IARC).
来源:Toxin and Toxin Target Database (T3DB)
毒理性
健康影响
医学问题可能包括肺充血、肝病、破伤风、心脏瓣膜感染、皮肤脓肿、贫血和肺炎。过量可能会导致死亡。
Medical problems can include congested lungs, liver disease, tetanus, infection of the heart valves, skin abscesses, anemia and pneumonia. Death can occur from overdose.
来源:Toxin and Toxin Target Database (T3DB)
毒理性
暴露途径
醋酸左美沙醇口服溶液可迅速吸收。
Levomethadyl acetate is rapidly absorbed from an oral solution.
来源:Toxin and Toxin Target Database (T3DB)
毒理性
症状
过量迹象包括呼吸暂停、循环衰竭、肺水肿、心脏骤停和死亡。
Signs of overdose include apnea, circulatory collapse, pulmonary edema, cardiac arrest, and death.
来源:Toxin and Toxin Target Database (T3DB)
吸收、分配和排泄
吸收
醋酸左美沙醇口服溶液可迅速吸收。
Levomethadyl acetate is rapidly absorbed from an oral solution.
The primary amine metabolites of alpha-(plus or minus)- alpha-(minus)-acetylmethadol were synthesized. A neutral permanganate oxidation of noracetylmethadol gave a nitroalkane. This unusual oxidation product was readily converted to the primary amine metabolite of acetylmethadol.
[EN] SPIROLACTAM CGRP RECEPTOR ANTAGONISTS<br/>[FR] ANTAGONISTES DE RÉCEPTEUR DE CGRP À BASE DE SPIROLACTAME
申请人:MERCK SHARP & DOHME
公开号:WO2013169567A1
公开(公告)日:2013-11-14
The present invention is directed to spirolactam analogues which are antagonists of CGRP receptors and useful in the treatment or prevention of diseases in which CGRP is involved, such as migraine. The invention is also directed to pharmaceutical compositions comprising these compounds and the use of these compounds and compositions in the prevention or treatment of such diseases in which CGRP is involved.
[EN] IMIDAZOLINONE DERIVATIVES AS CGRP RECEPTOR ANTAGONISTS<br/>[FR] DÉRIVÉS D'IMIDAZOLINONE EN TANT QU'ANTAGONISTES DE RÉCEPTEURS CGRP
申请人:MERCK SHARP & DOHME
公开号:WO2010077752A1
公开(公告)日:2010-07-08
The present invention is directed to imidazolinone derivatives which are antagonists of CGRP receptors and useful in the treatment or prevention of diseases in which CGRP is involved, such as migraine. The invention is also directed to pharmaceutical compositions comprising these compounds and the use of these compounds and compositions in the prevention or treatment of such diseases in which CGRP is involved.
[EN] PEPTIDE-BASED MULTIPLE-DRUG DELIVERY VEHICLE<br/>[FR] VÉHICULE D'ADMINISTRATION DE MÉDICAMENTS MULTIPLES À BASE DE PEPTIDES
申请人:ARIEL-UNIVERSITY RES AND DEV COMPANY LTD
公开号:WO2017068577A1
公开(公告)日:2017-04-27
A molecular structure comprising a targeting moiety, a multi-functional peptide platform and a plurality of controllably released bioactive agents attached thereto is provided herein.
本文提供了一种包括靶向基团、多功能肽平台和附着在其上的多种可控释放的生物活性剂的分子结构。
3,4,6-Substituted pyridazines for treating neuropathic pain and associated syndromes
申请人:Sultzbaugh Lance
公开号:US20070191365A1
公开(公告)日:2007-08-16
The present invention is directed to the use of 3,4,6-substituted pyridazines such as those characterized by structure I for treating conditions such as neuropathic pain among others.
本发明涉及使用3,4,6-取代吡啶嗪,如结构I所示的化合物,用于治疗神经病痛等疾病。
[EN] QUATERNARY PIPERIDINE DERIVATIVES AND USES THEREOF<br/>[FR] DÉRIVÉS QUATERNAIRES DE PIPÉRIDINE ET LEURS UTILISATIONS
申请人:ASTRAZENECA AB
公开号:WO2010071575A1
公开(公告)日:2010-06-24
This invention generally relates to quaternary piperidine compounds, particularly substituted 3-phenylpiperidine compounds and salts thereof. This invention also relates to pharmaceutical compositions comprising such a compound, uses of such a compound (including, for example, treatment methods and medicament preparations), and processes for making such a compound.