18. Use of any medication within one month prior to the study with cholinergic or anticholinergic properties, including (but not limited to): nicotine patch, nicorette gum, atrovent, enablex, toriaz, ditropan, vesicare, detrol, sanctura, artane, Aricept, cogentin, akineton, zanaflex, norflex, flexeril, lomotil, mototen, levsin, razadyne, exelon (part I)