Solifenacin Flexible Dosing Study in Frequent Micturition Patients With and Without Urgency

Inclusion Criteria: * For the without-urgency group: * urinary frequency ≥ 8 micturitions per 24 hours no urgency on voiding diary (1 or 2 on a 5 urgency scale) * For the with-urgency group: * urinary frequency ≥ 8 micturitions per 24 hours symptoms of urinary urgency≥ 2/day on the voiding diary (3 to 5 on a 5 urgency scale) * Symptoms lasting for more than 3 months Exclusion Criteria: * Clinically significant stress incontinence as determined by the investigator; for female patients, clinically significant stress incontinence confirmed by a cough provocation test * Total daily urine volume of \> 3000 mL as verified on the micturition diary before randomization * Significant hepatic or renal disease, defined as having twice the upper limit of the reference ranges for serum concentrations of aspartate aminotra * Any condition that is a contraindication for anticholinergic treatment, including uncontrolled narrow-angled glaucoma, urinary retention or gastric retention * Symptomatic acute urinary tract infection (UTI) during the run-in period * Recurrent UTIs defined as having been treated for symptomatic UTIs \> 4 times in the last year * Diagnosed or suspected of interstitial cystitis * Uninvestigated hematuria or hematuria secondary to a malignant disease * Clinically significant bladder outlet obstruction defined by clinical symptoms and investigator's opinion according to local standard of care (residual urine\> 100mL of functional bladder capacity) * Patients with marked cystocele or other clinically significant pelvic prolapse * Treatment within 14 days preceding randomization, or expected to initiate treatment during the study with: * Any anticholinergic drugs other than a randomized trial drug * Any drug treatment for overactive bladder. Estrogen treatment started more than 2 months prior to inclusion is allowed * On an unstable dosage of any drug with anticholinergic side effects, or expected to start such treatment during the study * Receipt of any electrostimulation or bladder training within 14 days before randomization, or expected to start such treatment during the study * An indwelling catheter or practicing intermittent self-catheterization * Use of any investigational drug within 1 month prior to the start of the study * Patients with chronic constipation or history of severe constipation * Pregnant or nursing women * Sexually active females of childbearing potential not using reliable contraception for at least 1 month prior to the start of the study and not agreeing to use such methods during the entire study period and for at least 1 month thereafter. Reliable contraceptive methods are defined as intrauterine devices (IUDs), combination type contraceptive pills, hormonal implants, double barrier method, injectable contraceptives and surgical procedures (tubal ligation or vasectomy) * Patients who have bladder cancer or prostate cancer * Treatment with potent CYP3A4 inhibitors, such as cyclosporine, vinblastine, macrolide antibiotics (e.g. erythromycin, clarithromycin, azithromycin) or antifungal agents (e.g. ketoconazole, itraconazole, micronazole) * Patients who have neurological disease * Patients who have psychological disease * Any other condition which, in the opinion of the investigator, makes the patient unsuitable for inclusion