The maximum daily dose is 3000mg (used to be 4000mg). So, you need to take a lot for it to be damaging. The main danger is when you take multiple products that contain it and OD unwittingly.
I have been doing well with tramadol and acetominophen. Getting hydrocodone in the US as a routine medication was just getting too much of a hassle. My rheumatologist suspects that tramadol will eventually be under the same restrictions.
Jan