Disclosed herein are storage-stable injectable preparations comprising a composition comprising a poorly soluble drug as an active ingredient, such as aripiprazole or brexpiprazole, a dispersion medium and a suspending agent selected from polyvinylpyrrolidone or polyethylene glycol and carboxymethyl cellulose. Another object of the present invention is to provide a compact, lightweight prefilled syringe by filling a syringe with the injectable preparation.
