scholarly journals Carbonyl Reduction of Flubendazole in the Human Liver: Strict Stereospecificity, Sex Difference, Low Risk of Drug Interactions

2019 ◽  
Vol 10 ◽  
Author(s):  
Vladimír Kubíček ◽  
Lenka Skálová ◽  
Adam Skarka ◽  
Věra Králová ◽  
Jana Holubová ◽  
...  
1991 ◽  
Vol 42 ◽  
pp. S93-S98 ◽  
Author(s):  
Edmund Maser ◽  
Thomas Gebel ◽  
Karl J. Netter

1998 ◽  
Vol 23 (3) ◽  
pp. 417-424 ◽  
Author(s):  
P. B. Desai ◽  
J. Z. Duan ◽  
Y -W. Zhu ◽  
S. Kouzi

Xenobiotica ◽  
2011 ◽  
Vol 41 (9) ◽  
pp. 758-763 ◽  
Author(s):  
Hye Hyun Yoo ◽  
Nam-Sun. Kim ◽  
Min Jung Kim ◽  
Dongyun Shin ◽  
Jae-Gook Shin ◽  
...  

2009 ◽  
Vol 33 (2) ◽  
pp. 279 ◽  
Author(s):  
Ken J Harvey

In 2003, the Therapeutic Goods Administration instituted a major recall of products made by Pan Pharmaceuticals Limited. Later that year, an expert committee produced 49 recommendations for complementary medicines reform, many of which were to be implemented by the proposed Australia New Zealand Therapeutic Products Authority (ANZTPA). In 2008, the Pan Pharmaceuticals affair reached some conclusion in the courts, the ANZTPA had been abandoned and the case for reform had intensified. There was widespread and increasing use of complementary medicines yet consumers were often unaware that, unlike conventional medicines, these medicines were not evaluated for efficacy. The justification of this two-tiered regulatory system was that complementary medicines are relatively low-risk products. However low risk does not mean no risk. A number of consumers have been shown to use these products for conditions where there is no evidence of effect, potentially placing them at risk. In addition, promotion often overstates their benefits while minimising and sometimes denying known adverse effects and drug interactions. Complaint procedures are overloaded and the ?sanctions? available do not deter repeat offenders. A number of regulatory reforms have been suggested to overcome these problems; they are reviewed in this paper.


2020 ◽  
Vol 10 (2) ◽  
pp. 104-112
Author(s):  
Gabriel Akyirem Akowuah ◽  
Jin Han Chin ◽  
Siew Wei Yeong ◽  
Suk Yen Quah ◽  
Mariam Ahmad

Background: Strobilanthes crispus (L.) Bremek (Acanthaceae) leaves are used traditionally in Malaysia, Thailand, and Indonesia for anti-diabetic, anti-lytic, diuretic, and laxative purposes. Herb-drug interactions may potentiate or antagonize the absorption and metabolism of drugs which may result in potential toxicity. The aim of the present study was to investigate the effect of juice, hot aqueous, cold aqueous and methanol extracts of S. crispus leaves on phase I cytochrome 3A4 (CYP3A4) and Cytochrome 2E1 (CYP2E1) and phase II human liver enzyme UDP-Glucuronosyl Transferase (UGT). Methods: The herb-drug interactions of the leaf extracts and juice were determined by specific enzyme activity of CYP isoforms with specific probe substrate using spectrophotometry. CYP3A4 activity was measured for aminopyrine specific metabolite (formaldehyde) at 415 nm. CYP2E1 activity was determined using p-nitrophenol specific metabolite (p-nitrocatechol) at 535 nm. UGT activity was quantified through the consumption of p-nitrophenol by UGT at 405 nm. Results: All the S. crispus preparations showed significant inhibition of CYP3A4 activity. Only the methanolic extract showed a significant inhibition in CYP2E1. All the S. crispus extracts showed a significant effect on UGT activation at the higher concentration (1000 ng/ml). Only the cold aqueous extract and the juice showed UGT inhibition at lower concentration (1 ng/ml). Conclusion: S. crispus preparations showed in-vitro drug-herb interaction effects on human liver microsomes. Therefore, there is a possibility of drug-herb interaction could occur with S. crispus leaves through its effect on CYP3A4. Inhibition of the herb extracts on CYP2E1 could show anticarcinogenesis effects. The potency of drugs that metabolized via UGT pathway may be affected when co-administered with S. crispus leaf preparations.


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