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Acetylcysteine is extensively liver metabolized, CYP450 minimal, urine excretion is 22–30% with a half-life of 5.6 hours in adults and 11 hours in newborns. [medical citation needed] Acetylcysteine is the N-acetyl derivative of the amino acid L-cysteine, and is a precursor in the formation of the antioxidant glutathione in the body.
Thiamphenicol glycinate acetylcysteine (TGA) is a pharmaceutical drug that is a combination of thiamphenicol glycinate ester (TAFGE), which is a derivative of the antibiotic thiamphenicol, and N-acetylcysteine (NAC), which is a mucus-thinning drug. Upon contact with tissue esterases, TGA releases both TAFGE and NAC.
[20] [74] Oral acetylcysteine is given as a 140 mg/kg loading dose followed by 70 mg/kg every four hours for 17 more doses, and if the patient vomits within 1 hour of dose, the dose must be repeated. [75] [76] Oral acetylcysteine may be poorly tolerated due to its unpleasant taste, odor, and its tendency to cause nausea and vomiting. [72]
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Cysteine (/ ˈ s ɪ s t ɪ iː n /; [5] symbol Cys or C [6]) is a semiessential [7] proteinogenic amino acid with the formula HOOC−CH(−NH 2)−CH 2 −SH. The thiol side chain in cysteine enables the formation of disulfide bonds, and often participates in enzymatic reactions as a nucleophile. Cysteine is chiral, but both D and L-cysteine ...
N-acetylcysteine has been shown to decrease drug-seeking behavior for nicotine and heroin as well. However, N-acetylcysteine does not alter the cocaine-induced rush or euphoria; it only causes a reduction in drug-seeking behavior. N-acetylcysteine works by increasing levels of cysteine in cells, leading to an increase in system Xc- activity.