Comparative Study between Lidocaine Gel 2% and 5% for Ophthalmic Procedures

Hélio Francisco Shiroma, Kleber Eidi Shimono, Michel Eid Farah, Raquel Goldhardt, Astor Grumann, Eduardo Buchele Rodrigues

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Abstract

Purpose: To compare same-day pain control and safety of 2 different anesthetic gels utilizing 5% and 2% lidocaine gel. Main outcome is to determine whether 5% lidocaine gel is more effective in decreasing pain during conjunctival clamping compared to 2% lidocaine gel 5 and 10 min after gel application. Methods: This is a prospective, randomized double-blind clinical trial. Patients were randomized to receive 2% or 5% lidocaine gel in each eye. Discomfort during the gel instillation and pain during conjunctival clamping 5 and 10 min after gel application were compared. Extent of corneal conjunctival staining was graded according to the Oxford scale. Results: Eighty eyes of 40 patients were enrolled. The groups were similar in gender, with a mean age of 48 ± 16.26 years. The 5% lidocaine gel resulted in higher discomfort during initial instillation (P = 0.092), however, the pain during conjunctival clamping was lower in the 5% lidocaine gel eyes (P = 0.564) in both 5 and 10 min later (P <0.001). The majority of patients (80%) had no corneal conjunctival dye staining. The tear break-up time was not statistically different after lidocaine gel 2% (20.35 ± 7.37 s) and lidocaine 5% (19.75 ± 7.00 s). Conclusion: Five percent and 2% lidocaine gel have similar efficacy controlling pain 5 min after instillation, however, 5% lidocaine gel appears to be more effective with a longer duration of action, without corneal toxicity. There was no corneal toxicity noted with either concentration.

Original languageEnglish (US)
Pages (from-to)192-195
Number of pages4
JournalJournal of Ocular Pharmacology and Therapeutics
Volume32
Issue number4
DOIs
StatePublished - May 1 2016

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ASJC Scopus subject areas

  • Pharmacology (medical)
  • Ophthalmology
  • Pharmacology

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