15249
Colloidal drug delivery systems ( CDDS ) are interesting systems , which are able to improve the duration of drug residence in the skin and to allow an achievable drug sustained and controlled release compared to conventional topical formulations . This review focuses on micro and nanoemulsions , vesicular carriers and nanoparticles as novel high efficiency delivery systems of NSAIDs in topical applications .
 None
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 None