The present invention provides a method and composition are provided for loading one or more drugs in a solution onto one or more ion exchange resin particles to form a drug-loaded resin particle. The drug-loaded resin particle is a sustained-release coated layered pharmaceutical drug-ion exchange resin having a one or more pharmaceutically active drugs applied directly to a non-equilibrated ion exchange resin to form a drug-resin complex. The drug-resin complex then coated is shelf stable.
