The study design allows 3 main research questions to be addressed: 1) Does M-BET reduce nocturia more than α-blockers?; 2) Does M-BET improve sleep more than α-blockers?; and 3) Will combination therapy be more effective than either treatment alone? The main outcomes will be nocturia reduction and sleep improvement at 12 weeks. Nocturia reduction will be assessed by participant completed bladder diaries and sleep improvement will be assessed by wrist-actigraph determined sleep efficiency, total sleep time, and wake time after sleep onset.