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Zonisamide is an antiseizure drug chemically classified as a sulfonamide and unrelated to other antiseizure agents. The precise mechanism by which zonisamide exerts its antiseizure effect is unknown, although it is believed that the drug blocks sodium and T-type calcium channels , which leads to the suppression of neuronal hypersynchronization ...
l-DOPA, also known as l-3,4-dihydroxyphenylalanine and used medically as levodopa, is made and used as part of the normal biology of some plants [2] and animals, including humans. Humans, as well as a portion of the other animals that utilize l -DOPA, make it via biosynthesis from the amino acid l -tyrosine .
COMT inhibitors are indicated for the treatment of Parkinson's disease in combination with levodopa and an aromatic L-amino acid decarboxylase inhibitor (e.g. carbidopa or benserazide). The therapeutic benefit of using a COMT inhibitor is based on its ability to prevent the methylation of levodopa to 3- O -methyldopa , thus increasing the ...
Guggenheim tried levodopa at a dose of 2.5 mg and thought that it was inactive aside from nausea and vomiting. [ 3 ] In work that earned him a Nobel Prize in 2000, Swedish scientist Arvid Carlsson first showed in the 1950s that administering levodopa to animals with drug-induced ( reserpine ) Parkinsonian symptoms caused a reduction in the ...
Droxidopa, also known as (–)-threo-3-(3,4-dihydroxyphenyl)-L-serine (L-DOPS), is a substituted phenethylamine and is chemically analogous to levodopa (L-3,4-dihydroxyphenylalanine; L-DOPA). Whereas levodopa functions as a precursor and prodrug to dopamine , droxidopa is a precursor and prodrug of norepinephrine .
[2] [5] It is a fixed-dose combination of foscarbidopa, an aromatic amino acid decarboxylation inhibitor and prodrug for carbidopa; [5] and foslevodopa, an aromatic amino acid and prodrug for levodopa that was developed by AbbVie.
Levodopa is a precursor to the neurotransmitter dopamine, which is administered to increase its levels in the central nervous system.However, most levodopa is decarboxylated to dopamine before it reaches the brain, and since dopamine is unable to cross the blood–brain barrier, this translates to little therapeutic gain with strong peripheral side effects.
Melevodopa, also known as levodopa methyl ester (LDME) and sold under the brand name Levomet, is a dopaminergic agent. It is the methyl ester of levodopa . [ 1 ] It is used in oral tablet form as an effervescent prodrug with 250 times the water solubility of tablet levodopa.