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Table 2 Parenteral and ophthalmic preparation European Pharmacopoeia criteria A and B (With permission from the European Pharmacopoeia[11])

From: Effectiveness of ophthalmic solution preservatives: a comparison of latanoprost with 0.02% benzalkonium chloride and travoprost with the sofZia preservative system

  Log reduction
   6 hours 24 hours 7 days 14 days 28 days
Bacteria A 2 3 - - NR
  B - 1 3 - NI
Fungi A - - 2 - NI
  B - - - 1 NI
  1. NI: no increase; NR: no recovery.