Tolterodine is a popular medication used to treat symptoms of overactive bladder, but there's been some chatter about it causing weight gain as a side effect. In this article, we'll dive into how tolterodine works, explore whether there's a real link to weight gain, and share some tips for managing any potential side effects. Whether you're currently taking tolterodine or considering it, you'll find this info handy in your decision-making process. Get the scoop on what science says and how you can stay informed.