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Hisamitsu America is the US division of Hisamitsu Pharmaceutical Co., Inc., founded in 1847, which has specialized in transdermal drug delivery system technology since the introduction of its Salonpas line of patches in 1934. The Salonpas® product line, which gained early acceptance in Asia and is now registered in over 30 countries, has pioneered the development of transdermal patches to relieve pain. Since 2010, Salonpas has become one of the fastest growing OTC brands in the USA.