| 摘要 |
The invention is directed to an ophthalmic composition comprising a disuccinate of formula I or a corresponding salt thereof; wherein R1 is selected from hydrogen, alkyl or -C(O)alkyl, the alkyl having one to twelve carbons and optionally one or more oxygen atoms, A is a methylene group or an oxyalkylene group, and n is from 2 to 8. The ophthalmic composition also includes a cationic antimicrobial component and a tonicity agent, wherein the tonicity agent provides for an osmolality of the composition from 200 mOs/kg to 420 mOsm/kg.
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