a positive trendP = 0.06
In a group of 660 patients IFIS was shown to be related to use of tamsulosin, history of use (but not current use) of other alpha1-antagonists, and hypertension; however, no correlation was found with individual use of angiotensin antagonists, anticholinergics, cholinergic agonists, muscle relaxants, nitric oxide donors, saw palmetto (but a positive trend was observed with P = 0.06 for current use), diabetes, or congestive heart failure [ 31 ].