Olapatadine or Patanol is an antihistamine eye drop suitable for allergic eye reactions such as those seen in hayfever.
Olapatadine or Patanol blocks histamine 1 release and inhibits mast cell degranulation - both effects reduce inflammation and itch.
Headache has been reported in about 7% of people using Olapatadine or Patanol. Sometimes the eye drop itself can cause eye irritation.
Olapatadine or Patanol is not suitable for people who have difficulty using eye drops, for example people with manual dexterity problems. It is longer acting that other anti allergy eye drops thus has to be applied only twice, not four times, daily.
Olapatadine or Patanol use with other drugs, and specifically other eye drops, has not been examined.
FDC Reports 1997;59(1):18
The Medical Letter 1997;39(1014):108
The relevant product monographs must be regarded as the appropriate sources of prescribing information.