Lidocain solution 1-2% have used with or without adrenaline for skin local anesthesia. Also normal salin, diphenhydramine and bacteriostatic salin have been used. The purpose of this study was to compare the effectiveness of 1% lidocain with 0.1% lidocain in local skin anesthesia.

This study was carried out by triple blind method on 140 patients that submitted to Hamedan Sina Hospital in 2000. These patients divided in two groups randomly, 70 cases received 1% lidocain and other 70 cases received 0.1% lidocain. The pain assessment score was between 0-10 that was asked from each patient and collected data analyzed by statistical methods.

This study showed that 51.1% of patients that received 1% lidocain and 48.9% that received 0.1% lidocain did not have any pain during injection (P>0.05). Also 54.3% of patients that received 1% lidocain and 45.7% that received 0.1% lidocain solution did not have any pain throw the procedure (P>0.05).

The effect of 0.1% lidocain solution had no much difference from
   1% lidocain in skin local anesthesia and thus it is suggested to use it for wide anesthesia in skin surgeries.