A device for delivering the beneficial agent at a controlled rate over a prolonged period of time 1, wherein the cationic surfactant is a member selected from {HEAD ~ the group} consisting of {TAIL ~ lauryldimethylbenzylammonium chloride}, diisobutylphenoxyethoxyethyldimethyl benzylammonium chloride, alkyldimethylbenzylammonium chloride, laurylisoquinolinium bromide, cetylethyldimethylammonium chloride, stearyldimethylbenzylammonium chloride, and ethanolated alkyl guanidine complex 
consisting of
A device for delivering the beneficial agent at a controlled rate over a prolonged period of time 1 , wherein the cationic surfactant is a member selected from { HEAD ~ the group } consisting of { TAIL ~ lauryldimethylbenzylammonium chloride } , diisobutylphenoxyethoxyethyldimethyl benzylammonium chloride , alkyldimethylbenzylammonium chloride , laurylisoquinolinium bromide , cetylethyldimethylammonium chloride , stearyldimethylbenzylammonium chloride , and ethanolated alkyl guanidine complex
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