esters of sulfuric hydrohalic and aromatic sulfonic acids among such esters are methyl chloride and bromide ethyl chloride propyl chloride butyl chloride isobutyl chloride benzylchloride and bromide phenethyl bromide naphthymethyl chloride dimethyl sulfate methyl benzenesulfonate ethyl toluenesulfonate ethylene chlorohydrin propylene chlorobydrin allyl bromide methylallyl bromide and crotyl bromide the topical compositions contemplated for administration of methylphenidate in accordance with the present invention are in a flexible finite system the term u201c adhesive u201d as used herein is intended in its broadest to mean a natural or synthetic polymer that is capable of sticking to the site of topical application and includes bioadhesives also referred to a mucoadhesives and pressuresensitive adhesives as are generally known in the art a polymer is a adhesive within the meaning of the term is it has the properties of an adhesive per se or if it functions as an adhesive by the addition of tackifiers plasticizers crosslinking agents or other additives especially preferred adhesives are acrylics natural and synthetic rubbers natural and synthetic gums polysiloxanes polyacrylates polyvinylpyrrolidones vinylpyrrolidone copolymers styrene block copolymers and mixtures thereof particularly suitable bioadhesives or mucoadhesives include natural or synthetic polysaccharides and polyacrylic acid polymers and mixtures thereof the term u201c polysaccharide u201d as used herein means a carbohydrate decomposable by hydrolysis into.