Shortly after I started my finasteride regime my left ankle became unusually soar. Every time I stood up after sitting or sleeping it would hurt when I walked. I thought it might be the finasteride but the pain has since gone away. I really have no idea what the cause of the pain was but I think many of us jump to the conclusion that any changes in our bodies are side effects from medications. In short, yes I've experienced pain in certain joints/muscles after taking finasteride, but can't be sure that the medication was the cause. My hair does look better though!