The acute effect of cigarette smoking on the respiratory function and FENO production among young smokers.

Introduction: Smoking is known to have a long-term impact on lung function; however, the acute physiological response of smoking a single cigarette and the influential role of pack years and cigarettes per day on pulmonary indices remains an area of interest, especially among young smokers.

Methods: 50 naive smokers (ages: 18-26, 24 males: mean pack years 3.8) participated in this experimental study.