['To compare the pain perception between intraurethral instillation of 2% lidocaine gel and liquid paraffin during Urodynamic study in men.', 'A randomized, single-blind comparison trial was conducted. Forty men scheduled to undergo multichannel Urodynamic study were randomized to receive either 10\u2009ml of 2% lidocaine gel (group 1, n\u2009=\u200920) or 10\u2009ml of liquid paraffin (group 2, n\u2009=\u200920). Patients recorded their pain on a 0-10 visual analog scale prior to lubricant instillation, immediately after lubricant instillation, after the introduction of the Urodynamic catheter, 5 and 30\u2009min after the catheter was taken out.', 'pain scores were significantly higher in group 1 compared to group 2 immediately after the instillation of the lubricants (4.2\u2009±\u20091.5 vs. 2.6\u2009±\u20090.9, P\u2009<\u20090.001) and after catheterization (4.8\u2009±\u20091.5 vs. 3.5\u2009±\u20091.1, P\u2009<\u20090.01). There were no differences in the pain scores between the two groups in the other time points that were evaluated.'] Is liquid paraffin superior to 2 % lidocaine gel in reducing urethral pain during urodynamic study in men : A pilot study?