Displaying 14 results of Oxybutynin Impurities Oxybutynin is an anticholinergic drug used to treat urinary incontinence and overactive bladder. However, during the manufacturing process, impurities can form, which are unwanted or harmful substances that can affect the quality, safety, and efficacy of the drug. These impurities can result from starting materials, reagents, solvents, or reaction byproducts. Therefore, it is crucial to identify, quantify, and control these impurities to ensure the purity and safety of oxybutynin products.