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Eur J Clin Pharmacol. 1988;34(1):77-82.

Pharmacokinetics and bioavailability of reduced and oxidized N-acetylcysteine.

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Research and Development Department, ACO Läkemedel AB, Solna, Sweden.


The pharmacokinetics and bioavailability of N-acetylcysteine (NAC) have been determined after its intravenous and oral administration to 6 healthy volunteers. According to a randomized cross-over design each subject received NAC 200 mg i.v. and 400 mg p.o., and blood samples were collected for 30 h. Reduced NAC had a volume of distribution (VSS) of 0.59 and a plasma clearance of 0.84 The terminal half-life after intravenous administration was 1.95 h. The oral bioavailability was 4.0%. Based on total NAC concentration, its volume of distribution (VSS) was 0.47 and its plasma clearance was 0.11 The terminal half-life was 5.58 h after intravenous administration and 6.25 h after oral administration. Oral bioavailability of total NAC was 9.1%.

[Indexed for MEDLINE]

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