Can I go to the E R, for late night carpal tunnel pain?

Yes

They take care of you , but they don't prescribe heavy pain releavers .

Yes..you can. They gave me a pill that got me through the night till i seen my Doctor. I would go to Urgent Care instead. They are across on the other side of the boulevard. In where all the other offices are . It does face 50 tho. It is a very nice place to go when needed.

You can go to the ER for any reason you see fit.