A bioactive dose for delivering a bioactive agent to a mammal, includes a solid bioactive dosage unit containing at least one bioactive agent and a rapid release coating provided on at least one outer surface of the solid bioactive dosage unit, the rapid release coating containing a material having a property of rapidly modulating a pH of bodily fluids in which the material comes in contact in a direction towards an ideal absorptive pH or towards an ideal pH to hinder absorption of the at least one bioactive agent given the pKa that least at one bioactive agent.
