Regurin is a brand name for the medication trospium chloride, which is commonly prescribed to treat symptoms of an overactive bladder, such as frequent or urgent urination and urinary incontinence. It belongs to a class of drugs known as antimuscarinics or anticholinergics, which work by relaxing the muscles in the bladder to help control urination. Regurin is typically taken orally, and it is available in both immediate-release and extended-release formulations to suit different treatment needs. By helping to manage the symptoms of an overactive bladder, Regurin can improve quality of life for individuals experiencing these conditions. Like all medications, it may cause side effects in some patients, so it should be used under the guidance of a healthcare professional.