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  2. Armodafinil - Wikipedia

    en.wikipedia.org/wiki/Armodafinil

    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

  3. Modafinil - Wikipedia

    en.wikipedia.org/wiki/Modafinil

    Elimination half-life is in the range of 10 to 12 hours, [11] [154] subject to differences in sex, [106] 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 ...

  4. Carcinoid syndrome - Wikipedia

    en.wikipedia.org/wiki/Carcinoid_syndrome

    Carcinoid syndrome is a paraneoplastic syndrome comprising the signs and symptoms that occur secondary to neuroendocrine tumors (formerly known as carcinoid tumors). [1] The syndrome is caused by neuroendocrine tumors most often found in the gut releasing biologically active substances into the blood causing symptoms such as flushing and diarrhea, and less frequently, heart failure, vomiting ...

  5. First pass effect - Wikipedia

    en.wikipedia.org/wiki/First_pass_effect

    First-pass metabolism may occur in the liver (for propranolol, lidocaine, clomethiazole, and nitroglycerin) or in the gut (for benzylpenicillin and insulin). [4] The four primary systems that affect the first pass effect of a drug are the enzymes of the gastrointestinal lumen, [5] gastrointestinal wall enzymes, [6] [7] [8] bacterial enzymes [5] and hepatic enzymes.

  6. Drug metabolism - Wikipedia

    en.wikipedia.org/wiki/Drug_metabolism

    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 ...

  7. CYP2E1 - Wikipedia

    en.wikipedia.org/wiki/CYP2E1

    CYP2E1 is a membrane protein expressed in high levels in the liver, where it composes nearly 50% of the total hepatic cytochrome P450 mRNA [8] and 7% of the hepatic cytochrome P450 protein. [9] The liver is therefore where most drugs undergo deactivation by CYP2E1, either directly or by facilitated excretion from the body.

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