Solifenacin hydrochloride is primarily used in the treatment of overactive bladder (OAB) syndrome. It helps to reduce symptoms such as frequent urination, urgency, and incontinence by relaxing the bladder muscles. This medication is often prescribed for patients who experience these symptoms due to neurological conditions or other underlying causes. It is typically administered orally in tablet form, and the dosage is adjusted based on the patient's response and tolerance. Solifenacin hydrochloride is also effective in improving the quality of life for individuals suffering from OAB by allowing better control over bladder function. It is important to follow the prescribed regimen and consult a healthcare provider for any side effects or concerns.