Dextran conjugates with nalidixic acid and oxacillin, were prepared in two
ways: (a) by the reaction of the drugs with chloroacetylated crosslinked de
xtran microparticles and (b) by the reaction of the drugs with crosslinked
polysaccharide microparticles in the presence of a coupling agent. The in v
itro behavior of these conjugates was studied and the mechanism of drug rel
ease was determined.