Provided is a therapeutic agent for lower urinary tract symptom consisting of (+)-3-{1-[3-(trifluoromethoxy)benzyl]piperidin-4-yl}-4-phenyl-3,4-dihydro-2(1H)-quinazolinone or a pharmaceutically acceptable salt thereof or a combination of (+)-3-{1-[3-(trifluoromethoxy)benzyl]piperidin-4-yl}-4-phenyl-3,4-dihydro-2(1H)-quinazolinone or a pharmaceutically acceptable salt thereof and a compound selected from the group consisting of α1-adrenergic receptor blockers, 5-α reductase inhibitors, antiandrogen drugs, β3-adrenergic receptor agonists, phosphodiesterase V inhibitors, plant preparations, amino acid preparations, herbal medicines and the like. Also provided is a method of using in combination the above-described therapeutic agent and a surgical treatment such as bladder distention or surgery.
