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 the group consisting of lauryldimethylbenzylammonium chloride, diisobutylphenoxyethoxyethyldimethyl benzylammonium chloride, {HEAD ~ alkyldimethylbenzylammonium chloride}, laurylisoquinolinium bromide, {TAIL ~ cetylethyldimethylammonium chloride}, stearyldimethylbenzylammonium chloride, and ethanolated alkyl guanidine complex 
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 the group consisting of lauryldimethylbenzylammonium chloride , diisobutylphenoxyethoxyethyldimethyl benzylammonium chloride , { HEAD ~ alkyldimethylbenzylammonium chloride } , laurylisoquinolinium bromide , { TAIL ~ cetylethyldimethylammonium chloride } , stearyldimethylbenzylammonium chloride , and ethanolated alkyl guanidine complex
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