Document Detail

Evaluation of the bioequivalence of two transdermal fentanyl systems following single and repeat applications.
MedLine Citation:
PMID:  16368047     Owner:  NLM     Status:  MEDLINE    
OBJECTIVE: Transdermal delivery of fentanyl has potential benefits over slow-release morphine, being largely preferred by patients owing to the combination of effective pain relief, a good safety profile and easy, pain-free dosing. The new drug-in-adhesive Durogesic D-TRANS fentanyl Matrix Delivery System (DDTDF) has improved pharmaceutical characteristics and patient acceptability compared to the original Durogesic transdermal reservoir system (fentanyl transdermal reservoir), whilst still providing reliable and consistent delivery of fentanyl. The bioequivalence of these two systems was evaluated in two studies.
RESEARCH DESIGNS AND METHODS: Eighty healthy volunteers received single (72 h) or multiple (288 h) applications of DDTDF and the transdermal reservoir system (100 microg/h) in two separate randomised, crossover bioequivalence studies. Bioequivalence was assessed by calculating the ratio of least squares means based on log-transformed data following single system application and at steady-state during the fourth application.
RESULTS: Both transdermal systems were bioequivalent with respect to all tested pharmacokinetic parameters. Inter-subject variability was comparable between the two systems and was greater than intra-subject variability. Transdermal delivery was well tolerated in both groups.
CONCLUSIONS: The pharmacokinetic results demonstrate that DDTDF is bioequivalent to the original fentanyl transdermal reservoir system after single and multiple applications.
Gayatri Sathyan; Cindy Guo; Krishna Sivakumar; Shalini Gidwani; Suneel Gupta
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't    
Journal Detail:
Title:  Current medical research and opinion     Volume:  21     ISSN:  0300-7995     ISO Abbreviation:  Curr Med Res Opin     Publication Date:  2005 Dec 
Date Detail:
Created Date:  2005-12-21     Completed Date:  2006-02-03     Revised Date:  2012-09-10    
Medline Journal Info:
Nlm Unique ID:  0351014     Medline TA:  Curr Med Res Opin     Country:  England    
Other Details:
Languages:  eng     Pagination:  1961-8     Citation Subset:  IM    
ALZA Corporation, Mountain View, CA, USA.
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MeSH Terms
Administration, Cutaneous
Analgesics, Opioid / administration & dosage*,  pharmacokinetics
Drug Delivery Systems
Fentanyl / administration & dosage*,  adverse effects,  pharmacokinetics*
Middle Aged
Randomized Controlled Trials as Topic
Therapeutic Equivalency
Reg. No./Substance:
0/Analgesics, Opioid; 437-38-7/Fentanyl

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine

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