| abstract |
【Task】 Planoprofen is unstable to light, and particularly when a nonionic surfactant coexists, the stability to light is significantly reduced. It is an object to keep an eye drop containing pranoprofen practically stable over a long period of time. [Solution] Either a polyethylene naphthalate container, a polyarylate container, a container whose material is polyethylene naphthalate or a container whose material is polyarylate is filled with an aqueous preparation containing pranoprofen. Therefore, the stability of pranoprofen with respect to light has been improved, and it has become possible to provide an eye drop that can keep pranoprofen stable for practical use over a long period of time. |