A sustained release apparatus including at least one sustained release mini tablet implant； the or each mini tablet implant including a pharmaceutically active composition including at least one pharmaceutically active component； and a carrier therefor, wherein the or each tablet implant is of the coated tablet or covered rod type； the or each mini tablet implant being approximately 0.1 to 0.5 times the length and/or diameter of a single immediate release tablet capable of providing the desired threshold blood level depending on the pharmaceutical active selected, and having a payload of approximately 30% to 70% by weight of the total payload of an equivalent immediate release treatment conducted for an equivalent period； the sustained release apparatus providing, in use, zero order release of pharmaceutical active.
