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Xenobiotica
the fate of foreign compounds in biological systems
Volume 47, 2017 - Issue 10
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Clinical Pharmacokinetics and Metabolism

Pharmacokinetics of guaifenesin, pseudoephedrine and hydrocodone in a combination oral liquid formulation, administered as single and multiple doses in healthy Chinese volunteers, and comparison with data for individual compounds formulated as Antuss®

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Pages 870-878 | Received 05 Aug 2016, Accepted 22 Sep 2016, Published online: 24 Oct 2016
 

Abstract

1. A new oral liquid formulation combining guaifenesin, pseudoephedrine and hydrocodone is effective in improving the symptoms of common cold. The pharmacokinetic properties of the individual components were evaluated in a randomized, open-label, four-period study in 12 healthy Chinese volunteers following single and multiple doses. The data were compared with data for the individual ingredients in Antuss®.

2. In the single-dose period, exposure levels (AUC and Cmax) for guaifenesin, pseudoephedrine and hydrocodone increased directly as the dose of the oral liquid formulation increased from 5 to 15 mL. Only minor amounts of guaifenesin and hydrocodone were excreted in urine (∼0.10% and 4.66%, respectively). Pseudoephedrine was mainly excreted unchanged, with 44.95% of the dose excreted in urine within 24 h. After multiple dosing, there was no obvious accumulation of any drug, as assessed by AUC. When considering Cmax, there was a trend toward accumulation of hydrocodone and pseudoephedrine. The pharmacokinetic profiles of guaifenesin and pseudoephedrine in the oral liquid formulation were similar to those in the branded preparation, Antuss®.

3. The newly developed oral liquid formulation combining guaifenesin, pseudoephedrine and hydrocodone was safe and well tolerated and might provide a reliable alternative to the branded formulation for patients with common colds.

Declaration of interest

The authors report no declarations of interest. This work was supported by grants from Guangdong Science and Technology Major Project (Grant Nos. 2011A080300003 and 2012A080204017). This research was also sponsored by Sinopharm Zhijun (Shenzhen) Pharmaceutical Co., Ltd. (Shenzhen, China), the manufacturer of the newly developed oral liquid formulation.

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