Abstract：
:This study was designed to investigate the multiple-dose pharmacokinetics, safety, and tolerability of the selective α4β2 nicotinic acetylcholine partial agonist, varenicline, in elderly (65-85 years old) nonsmokers. Fifty male and female subjects with normal renal function for their age were randomized to receive varenicline or placebo once or twice daily for 3 weeks in an investigator- and subject-blinded parallel-group design. Treatment regimens included weekly titration (n = 14; days 1-7, 0.5 mg once daily; days 8-14, 0.5 mg twice daily; days 15-21, 1 mg twice daily); 2-week twice-daily titration (n = 13; days 1-14, 0.5 mg once daily; days 15-21, 0.5 mg twice daily); 2-week once-daily titration (n = 13; days 1-14, 0.5 mg once daily; days 15-21, 1 mg once daily); and placebo (n = 10). Approximate dose-proportional increases in systemic exposure of varenicline at steady state, based on maximum concentration and area under the plasma concentration-time curve over the 24-hour period at steady state, were observed across the dose range of 0.5 to 2 mg/d. Median time to maximum concentration was 3 hours. Mean elimination half-life was estimated to be approximately 24 to 32 hours and independent of dose. Varenicline was considered to be safe and well tolerated in this elderly nonsmoking population.
journal_name
J Clin Pharmacoljournal_title
Journal of clinical pharmacologyauthors
Zhao Q,Schwam E,Fullerton T,O'Gorman M,Burstein AHdoi
10.1177/0091270010370461subject
Has Abstractpub_date
2011-04-01 00:00:00pages
492-501issue
4eissn
0091-2700issn
1552-4604pii
0091270010370461journal_volume
51pub_type
杂志文章,多中心研究,随机对照试验abstract：:Selection of the first dose for neonates in clinical trials is very challenging. The objective of this analysis was to assess if a population pharmacokinetic (PK) model developed with data from infants to adults is predictive of neonatal clearance and to evaluate what age range of prior PK data is needed for informati...
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