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- W2017791894 abstract "1. Following oral dosing of 7,8-dichloro-1,2,3,4-tetrahydro[1-14C]isoquinoline (14C-DCTQ) to rats, the plasma 14C increased steadily for 24h. In dogs, the 14C peak occurred at 40min. The concn. of unchanged drug in rats remained constant for 2h following oral administration then decreased with a t1/2 of 18h. In the dog unchanged drug levels were highest at 20min then fell with a t1/2 of 1·2h.2. Intravenous administration of 14C-DCTQ to rats resulted in a biphasic fall in plasma unchanged drug levels with t1/2 of 1.5 and 18h. In the dog after intravenous administration, plasma levels of unchanged drug fell with t1/2 of 1·2h.3. Binding of the drug to plasma protein in vitro was 97.9% in rat, 99.4% in dog 99.7% in human. Distribution in blood was 39.5% cellular, 59.2% protein, 1.3% free, in rat; 13.4% cellular, 86.1% protein, 0.5% free, in dog; and 7.5% cellular, 92.2% protein and 0.3% free, in human.4. Tissues in rat that had higher concn. of 14C than blood, in decreasing order were: kidney, liver, adrenal, lung, gastro-intestinal (g.i.) tract, fat, brain (oral dosage); and lung, adrenal, brain, kidney, liver, heart, spleen, g.i. tract (intravenous dosage). Up to 80-87% of brain 14C was present as unchanged drug.5. Rats dosed orallv with 14C-DCTQ excreted 64% of the dose of 14C in urine and 33% in faeces; after intravenous administration exretion was 58% in urine and 28% in faeces.6. Chronic oral dosage of 14C-DCTQ to pregnant rats produced 14C concn. in the fullterm foetus, half that of maternal plasma concn.7. Concn. of 14C in the milk of lactating rats dosed with 14C-DCTQ, averaged 87% of the plasma 14C over 5 days." @default.
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- W2017791894 date "1981-01-01" @default.
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- W2017791894 title "Metabolism of 7,8-dichloro-1,2,3,4-tetrahydroisoquinoline, a phenylethanolamineN-methyltransferase inhibitor. I. Disposition following administration to the rat and dog" @default.
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- W2017791894 doi "https://doi.org/10.3109/00498258109045308" @default.
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