It is an object of the present invention to provide a pharmaceutical composition, which can suppress a reduction in the content of an active ingredient caused by oxidation or decomposition of rapamycin or a derivative thereof, can ensure long-term stability, and has high safety. In the present invention, the inventors have found that (B) a tocopherol derivative and (C) a phospholipid are used in a pharmaceutical formulation comprising rapamycin or a derivative thereof, so that oxidation or decomposition of the rapamycin or a derivative thereof can be suppressed, thereby completing the present invention. The rapamycin or a derivative thereof, and (B) the tocopherol derivative and (C) the phospholipid are preferably in the form of a solid mixture produced by preparing a solution containing these components and then removing the solvent from the solution.
