Abstract
Asthma and COPD (Chronic Obstructive Pulmonary Disease) are well defined. Recently, ACOS (Asthma Overlap Syndrome and COPD) has been discussed, a variant, with clinical manifestations similar to what is reported in COPD, but with a significant response to the use of bronchodilators. The anti-inflammatory cholinergic system and nicotinic receptors have been shown to be important in modulat…