the aripiprazole will form a complex with the substituted u03b2 cyclodextrin which complex may be dissolved in water to form an injectable formulation however physical mixtures of aripiprazole and the substituted u03b2 cyclodextrin are within the scope of the present invention as well the complex or the physical mixture may also be compressed into a tablet or may be filled into capsules the aripiprazole formulations of the invention may be formed of dry physical mixtures of aripiprazole and the substituted u03b2 cyclodextrin or dry inclusion complexes thereof which upon addition of water are reconstituted to form an aqueous injectable formulation alternatively the aqueous injectable formulation may be freeze dried and later reconstituted with water thus the inclusion complex in accordance with the invention may be pre formed formed in situ or formed in vivo in the gastrointestional tract or the buccal cavity all of the above are contemplated by the present invention the aripiprazole formulation of the invention in the form of an aqueous injectable will include an acid buffer to adjust ph of the aqueous injection within the range from about 3 5 to about 5 examples of acid buffers suitable for use herein include acids such as hydrochloric acid sulfuric acid phosphoric acid hydrobromic acid and the like and organic acids such as oxalic acid maleic acid fumaric acid lactic acid malic acid tartaric acid citric acid.