Dopa Health Dictionary

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Dopa: From 2 Different Sources

A precursor of DOPAMINE and NORADRENALINE. Levodopa is a drug used in the treatment of PARKINSONISM. It can cross the blood–brain barrier and increase the concentration of dopamine in the basal ganglia. It also inhibits prolactin secretion and may be used to treat GALACTORRHEA.
Health Source: Medical Dictionary
Author: Health Dictionary
n. dihydroxyphenylalanine: a physiologically important compound that forms an intermediate stage in the synthesis of catecholamines (dopamine, adrenaline, and noradrenaline) from the essential amino acid tyrosine. It also plays a role itself in the functioning of certain parts of the brain. The laevorotatory form, *levodopa, is administered for the treatment of *parkinsonism, in which there is a deficiency of the neurotransmitter *dopamine in the brain.
Health Source: Oxford | Concise Colour Medical Dictionary
Author: Jonathan Law, Elizabeth Martin

Dopamine

Dopamine is one of the CATECHOLAMINES and a precursor of NORADRENALINE. Its highest concentration is in that portion of the brain known as the basal nuclei (see BRAIN) where its function is to convey inhibitory in?uences to the extrapyramidal system. There is good evidence that dopamine de?ciency is one of the causative factors in PARKINSONISM.

Dopamine is given by intravenous infusion as treatment for cardiogenic shock in cardiac infarction or cardiac surgery.... dopamine

L. Dopa

An amino acid present in some foods and plants. Prepared synthetically in the laboratory when used as the basic medication for Parkinson’s disease. Has enabled millions of elderly sufferers to lead a useful and less painful life with reduced muscle tension. On entering the brain the substance is known as dopamine.

In old age the concentration of L-dopa in the brain decreases. This substance is available in very high concentrations in the plant Vivia faba (broad bean). Highest concentration is found in type WH 305. Research has shown that regular eating of these golden beans can prolong life expectancy, slow down the ageing process and possibly allow a reduced dosage in medication. ... l. dopa

Dopa-decarboxylase Inhibitors

Drugs used in the treatment of Parkinson’s disease.

The 2 main dopa-decarboxylase inhibitors, co-beneldopa and co-careldopa, are a combination of levodopa and benserazide and levodopa and carbidopa respectively.

These drugs prevent levodopa from being activated except within the brain, which reduces the incidence of side effects such as nausea and vomiting.... dopa-decarboxylase inhibitors

Dopamine Hypothesis

the theory that *schizophrenia is caused in part by abnormalities in the metabolism of *dopamine and can be treated in part by drugs that antagonize its action as a neurotransmitter.... dopamine hypothesis

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