Hello everybody and thank you for your future help. This is my first post because I am new to this site. So as of right now, I am prescribed Norco for lower back issues. When I take them during the day , sometimes I have to nap because it makes me so tired. When I lay down and close my eyes, I start getting a lot of anxiety because I feel so weird. My heart races and I'll even start twitching. I don't really know how to explain the feeling, but it's bad and scary. Sometimes it gets so bad I keep my phone right next to me just in case I need to call someone for help. So much anxiety hits me,the twitching of my whole body and head, heart racing, etc. Anyone know of this side effect? Thank you .