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Last Updated: 2 years ago

Possible Interaction: Levodopa and Quercetin

supplement:

Quercetin

Research Papers that Mention the Interaction

In conclusion, quercetin possesses strong iron-chelating abilities and could be recommended as a disease-modifying therapy when administered in combination with L-dopa , early on in the course of Parkinson's disease.
Quercetin efficiently halted the deleterious toxic effects of L-dopa , revealing normalization of catalepsy and rotarod score, in addition to amelioration of neurochemical parameters, indicating benefit of both symptomatic and neuroprotective therapies.
Advances in experimental medicine and biology  •  2020  |  View Paper
While both tea catechins and quercetin strongly inhibit human liver catechol-O-methyltransferase (COMT)-mediated O-methylation of L-DOPA in vitro, only (+)-catechin exerts a significant inhibition of L-DOPA methylation in both peripheral compartment and striatum in rats.
Brain Research  •  2013  |  View Paper
Quercetin through its COMT and MAO enzyme-inhibiting properties might potentiate the anticatatonic effect of L-dopa plus carbidopa treatment.
When quercetin was combined with a subthreshold dose of L-dopa plus carbidopa, the anticatatonic effect was potentiated.
Pharmacology  •  2003  |  View Paper
In the time course of the oxidation of L-3,4-dihydroxyphenylalanine (L-DOPA) catalyzed by the enzyme in the presence of different concentrations of quercetin , the rate decreased with increasing time until a straight line was approached.
Journal of agricultural and food chemistry  •  2002  |  View Paper