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Elimination half-life is in the range of 10 to 12 hours, [11] [155] subject to differences in sex, [107] in cytochrome P450 genotypes, liver function and renal function. Modafinil is metabolized mainly in the liver, [11] and its inactive metabolites are excreted in the urine. Urinary excretion of the unchanged drug is usually less than 10% but ...
At steady state, the systemic exposure for armodafinil is 1.8 times the exposure observed after a single dose. The concentration-time profiles of the (R)-(−)-enantiomer following a single dose of 50 mg Nuvigil or 100 mg Provigil (modafinil being a 1:1 mixture of (R)-(−)- and (S)-(−)- enantiomers
Chemical structure of modafinil.. This page lists chemical compounds similar to modafinil, known as modafinil analogues and derivatives.These are structural analogues and derivatives of modafinil, a drug that affects dopamine levels in the brain in an unusual way (atypical dopamine reuptake inhibitor or DRI).
The kidney is the main excretory organ although others exist such as the liver, the skin, the lungs or glandular structures, such as the salivary glands and the lacrimal glands. These organs or structures use specific routes to expel a drug from the body, these are termed elimination pathways :
Drug metabolism is the metabolic breakdown of drugs by living organisms, usually through specialized enzymatic systems. More generally, xenobiotic metabolism (from the Greek xenos "stranger" and biotic "related to living beings") is the set of metabolic pathways that modify the chemical structure of xenobiotics, which are compounds foreign to an organism's normal biochemistry, such as any drug ...
In an adult, FMO1 is predominately expressed in the kidneys and to a lesser extent in the lungs and small intestine. FMO2 is the most abundant of the FMO's and is mostly expressed in the lungs and kidneys, with lower expression in the liver and small intestine. FMO3 is highly concentrated in the liver, but is also expressed in the lungs.