An interventional active/placebo double blinded parallel randomized controlled study in which at 12 weeks of treatment, the primary endpoint of patient perception of bladder condition is measured along with associated safety and other secondary endpoints like bladder diary endpoints, quality of life and patient treatment satisfaction.

Patients included in the study must have symptoms of OAB (frequency of at least 8 per day and Urgency of at least 1 episode per day confirmed by bladder diary).

Patients are not eligible to enroll in the study if they have/had significant hepatic or renal disease, history of radiation treatment.

Inclusion Criteria:

• Symptoms of OAB (frequency more than 8 per day and Urgency more than 1 episode per day confirmed by bladder diary)

Exclusion Criteria:

• Significant hepatic or renal disease, history of radiation treatment