Regurin XL is a brand name for the medication trospium chloride, which is commonly prescribed to treat symptoms of an overactive bladder. This includes conditions such as urinary incontinence, urgency, and frequency. As an antimuscarinic agent, Regurin XL works by blocking specific receptors in the bladder, helping to relax the bladder muscles. This action reduces the spasms that cause the urgent and frequent need to urinate, thereby helping to control the symptoms of bladder overactivity. Regurin XL is formulated as an extended-release capsule, designed to release the medication slowly over time, allowing for once-daily dosing. Patients are advised to follow their healthcare provider's instructions closely when taking Regurin XL, including any dietary or activity restrictions.