An improved
controlled release composition for non-parenteral administration of active agents and other therapeutics, particularly for oral or topical administration, has been developed. The composition is made by dispersing a complex formed of an
active agent bound to an
ion-exchange resin or to another form of resin or carrier, in a non-ionic non-aqueous (“NINA”) vehicle. The complexes are optionally coated with one or more
layers of
coating material to provide a controlled pattern of release of
active agent from the carrier. Replacing the usual aqueous vehicle with a NINA vehicle, such as an oil or an ointment, allows the
active agent-carrier complexes, with or without coatings, to be both orally and topically administered. The compositions can be formulated as powders, liquids, liquid suspensions, gels, capsules, soft
gelatin capsules, tablets, chewable tablets, topical ointments, lotions, pourable or pumpable fluids, semisolid, crushable tablets, and unit-of-use sachets or capsules for reconstitution or direct application. The combination of multiple active agents is possible with this
system, in which one or more active agents are bound to particles and one or more active agents are dissolved or dispersed in the NINA vehicle. This allows the combination of two or more active agents, which are otherwise incompatible, into a single
dosage form.