Has anyone used salonpas while pregnant?? The sticky things that are suppose to help with pain. My neck and lower back…

Has anyone used salonpas while pregnant?? The sticky things that are suppose to help with pain. My neck and lower back has been killing me all day and I wanted to use one but my research on it is very confusing.. I'm not sure if they are safe... If you have any idea or have used them please comment and let me know