At Screening (Visit 1), subjects will enter into a 4-week open label tamsulosin hydrochloride 0.4 mg QD run-in period prior to being randomized into the 12-week double-blind treatment period (Visit 2). At conclusion of the 4-week tamsulosin hydrochloride run-in period, subjects will complete a 3-day diary just prior to Baseline (Visit 2). Approximately 7 days prior to Visit 2 subjects will receive a phone call reminding them about the diary and to answer any questions.