A review of olopatadine for the treatment of ocular allergy

Expert Opin Pharmacother. 2004 Sep;5(9):1979-94. doi: 10.1517/14656566.5.9.1979.


Ocular allergy affects > 20% of the general population and many therapeutic preparations are available to individuals experiencing the most common forms--seasonal and perennial allergic conjunctivitis. 0.1% Olopatadine topical ophthalmic solution is currently approved for the treatment of allergic signs and symptoms in patients > or = 3 years of age. Olopatadine is available in Europe as Opatanol) and in > 30 other countries as Patanol. It inhibits mast cell degranulation and antagonises histamine receptors to manage the itching, redness, chemosis, tearing and lid swelling of the ocular allergic reaction, and its mast cell stabilising ability has been demonstrated both in vitro (using human conjunctival mast cells) and in vivo (human clinical experience). This article reviews both the laboratory and clinical information available on olopatadine, prefaced by a discussion of the current understanding of the ocular allergic reaction and followed by the future implications for this compound. Both laboratory and clinical studies have established the efficacy, safety and comfort of olopatadine in several study design models and comparisons to other antiallergy medications. The application of olopatadine, specifically in the management of lid swelling, an allergic sign recalcitrant to therapy and nasal allergic symptoms has also been established. In the future, a new formulation containing 0.2% olopatadine exhibits a duration of action up to 24 h, supporting once-daily dosing.

Publication types

  • Review

MeSH terms

  • Animals
  • Anti-Allergic Agents / pharmacology
  • Anti-Allergic Agents / therapeutic use*
  • Blepharitis / drug therapy
  • Conjunctivitis, Allergic / complications
  • Conjunctivitis, Allergic / drug therapy*
  • Conjunctivitis, Allergic / immunology
  • Contact Lenses
  • Dibenzoxepins / pharmacology
  • Dibenzoxepins / therapeutic use*
  • Histamine H1 Antagonists / pharmacology
  • Histamine H1 Antagonists / therapeutic use
  • Humans
  • Mast Cells / drug effects
  • Olopatadine Hydrochloride
  • Ophthalmic Solutions
  • Randomized Controlled Trials as Topic
  • Rhinitis / complications
  • Rhinitis / drug therapy


  • Anti-Allergic Agents
  • Dibenzoxepins
  • Histamine H1 Antagonists
  • Ophthalmic Solutions
  • Olopatadine Hydrochloride