Coated particle formulation

A solid oral formulation comprising olanzapine as an active ingredient with one or more pharmaceutically acceptable excipients,

• wherein the olanzapine is coated with a polymer selected from the group consisting of cetyl alcohol, cetyl esters wax, carnauba wax, shellac, beeswax, magnesium stearate, hydroxypropyl methyl cellulose, hydroxyethyl cellulose, methylhydroxyethylcellulose, sodium carboxymethylcellulose, hydroxypropylcellulose, polyvinyl pyrrolidone, dimethylaminoethyl methacrylatemethylacrylate acid ester copolymer, ethylacrylate-methylmethacrylate copolymer, methylcellulose, and ethylcellulose.