Maprotiline HCl - CAS 10347-81-6
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Not Intended for Therapeutic Use. For research use only.
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Maprotiline HCl is a selective noradrenalin re-uptake inhibitor and a tetracyclic antidepressant.
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1.Biotransformation of oxaprotiline: isolation and identification of metabolites in urine of rat and dog.
Dieterle W, Faigle JW, Kriemler HP, Winkler T. Xenobiotica. 1986 Aug;16(8):743-52.
The biotransformation of oxaprotiline has been investigated in rat and dog after oral administration of racemic 14C-labelled oxaprotiline X HCl. Rats excreted 28% dose in urine within 120 h and dogs 32% within 96 h. The metabolites were isolated by liquid chromatography and their structures elucidated by spectroscopic methods. In both species, oxaprotiline is extensively metabolized. Principal metabolic transformations are aromatic hydroxylations and formation of aromatic hydroxy-methoxy derivatives, N-demethylation, deamination and direct O-glucuronidation. Most of the primary metabolites formed by functionalization reactions occur in both free and glucuronidated form. In the rat, diastereoisomeric 3-hydroxy metabolites and the corresponding phenolic glucuronides are predominant. Products of deamination are minor, and products of direct O-glucuronidation are not detectable. In the dog, biotransformation is more complex. Major metabolites are diastereoisomeric 2- and 3-hydroxy compounds and the corresponding phenolic glucuronides.
2.The metabolic fate of 14C-oxaprotiline X HCl in man. III. Stereospecific disposition.
Dieterle W, Faigle JW, Küng W, Theobald W. Biopharm Drug Dispos. 1984 Oct-Dec;5(4):377-86.
The disposition of the enantiomers of oxaprotiline has been investigated after single 100 mg oral doses of racemic 14C-labelled oxaprotiline X HCl in two healthy subjects. Absorption was complete. Peak blood concentrations of total 14C were 804 and 1010 ng equiv. g-1 after 4-6 h in the two subjects. After 9 days 85 and 80 per cent of the dose were excreted in urine, and a total of 93 and 87 per cent were found in the excreta. Mean peak blood concentrations of unchanged S(+)- and R(-)-oxaprotiline amounted to 25 and 10 ng g-1 before, and 474 and 422 ng g-1 after acid hydrolysis (free plus O-glucuronide). The mean blood half-lives of the S(+) and R(-) isomers were 22 and 23 h. Direct O-glucuronidation is the major metabolic pathway and N-demethylation a minor one. The former is more marked with the S(+) isomer and the latter with the R(-) isomer. For oxaprotiline, the AUC-ration of S(+) to R(-) was 2.2 before and 1.4 after hydrolysis. For desmethyl oxaprotiline the corresponding ration was 0.
3.Convulsive attacks due to antidepressant drug overdoses: case reports and discussion.
Flechter S, Rabey JM, Regev I, Borenstein N, Vardi J. Gen Hosp Psychiatry. 1983 Sep;5(3):217-21.
Antidepressant drug overdoses have been reported to induce seizures, but the etiology of this phenomenon is still unclear. Recently we treated three patients who suffered from epileptic seizures after acute overdoses of three antidepressant drugs: (a) Dibenzepin HCl (Noveril), (b) Maprotiline HCl (Ludiomil), and (c) Clorimipramine (Anafranil). After a review of the pertinent literature, the possible role of antidepressant drugs in the genesis of epileptic seizures is discussed.
4.The metabolic fate of [14C]oxaprotiline.HCl in man. II. Isolation and identification of metabolites.
Dieterle W, Faigle JW, Kriemler HP, Winkler T. Xenobiotica. 1984 Apr;14(4):311-9.
The new antidepressant agent oxaprotiline is extensively metabolized by man. Following an oral 50 mg dose of racemic [14C]oxaprotiline, most of the 14C was excreted in the urine as metabolites (greater than 98% total 14C); only 1% was excreted unchanged. Glucuronidation at the carbinol group of the molecule is the major metabolic pathway (83%). The two diastereoisomeric glucuronides were separated; the more polar O-glucuronide of S(+)-oxaprotiline predominates (44%), suggesting stereoselective disposition of the two enantiomers. Oxidative pathways are minor, and yield desmethyl oxaprotiline (10%) and 3-hydroxy R(-)-oxaprotiline (4%), both of which are conjugated with glucuronic acid. The biotransformation of oxaprotiline in man is less complex than that of other polycyclic antidepressants, which are metabolized mainly by oxidative reactions.
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CAS 10347-81-6 Maprotiline HCl

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