Abstract: Provided are methods of treating an overactive bladder in a patient which include: administering a Myosin II ATPase inhibitor compound; or administering an X group and Y group substituted (3a-hydroxy-1-phenyl-1,2,3,3a-tetrahydro-4H-pyrollo[2,3b] quinolin-4-one) compound of Formula 1 or administering an X group and Y group substituted (3a-hydroxy-1-phenyl-1,2,3,3a-tetrahydro-4H-pyrollo[2,3b] quinolin-4-one) compound of Formula II; or administering pharmaceutically-acceptable salts, racemic mixtures, enantiomers, or prodrugs of said compounds, useful in their active form as inhibitors of Myosin II ATPase related to over-active bladder. Optionally the compounds are administered intervesicularly into the bladder. Also provided are pharmaceutical compositions comprising said compounds useful in their active form, as methods of treating a patient suffering from an over-active bladder related to inhibition of Myosin II ATPase.